Python sqlalchemy.dialects.postgresql 模块，ENUM 实例源码

def upgrade():
    """Upgrade the database to a newer revision."""
    # commands auto generated by Alembic - please adjust! ###
    op.create_table('component_gh_usage',
                    sa.Column('id', sa.Integer(), nullable=False),
                    sa.Column('name', sa.String(length=255), nullable=False),
                    sa.Column('version', sa.String(length=255), nullable=False),
                    sa.Column('count', sa.Integer(), nullable=False),
                    sa.Column('ecosystem_backend', postgresql.ENUM('none', 'npm', 'maven', 'pypi',
                                                                   'rubygems', 'scm', 'crates',
                                                                   name='ecosystem_backend_enum',
                                                                   create_type=False),
                              nullable=True),
                    sa.Column('timestamp', sa.DateTime(), server_default=sa.text('LOCALTIMESTAMP'),
                              nullable=False),
                    sa.PrimaryKeyConstraint('id'))
    # end Alembic commands ###

def upgrade():
    """Upgrade the database to a newer revision."""
    # ### commands auto generated by Alembic - please adjust! ###
    op.create_table('component_gh_usage',
                    sa.Column('id', sa.Integer(), nullable=False),
                    sa.Column('name', sa.String(length=255), nullable=False),
                    sa.Column('version', sa.String(length=255), nullable=False),
                    sa.Column('count', sa.Integer(), nullable=False),
                    sa.Column('ecosystem_backend', postgresql.ENUM('none', 'npm', 'maven', 'pypi',
                                                                   'rubygems', 'scm', 'crates',
                                                                   name='ecosystem_backend_enum',
                                                                   create_type=False),
                              nullable=True),
                    sa.Column('timestamp', sa.DateTime(), server_default=sa.text('LOCALTIMESTAMP'),
                              nullable=False), sa.PrimaryKeyConstraint('id'))
    # ### end Alembic commands ###

def create(op, name, *values):

    enum = ENUM(*values, name=name, create_type=False)
    enum.create(op.get_bind(), checkfirst=True)

    return enum

def existing(name):
    return ENUM(name=name, create_type=False)

def upgrade():
    ### commands auto generated by Alembic - please adjust! ###
    semester = postgresql.ENUM('Fall', 'Spring', 'Neither', name='co_op_enum')
    semester.create(op.get_bind())
    op.add_column('current_coops', sa.Column('semester', sa.Enum('Fall', 'Spring', 'Neither', name='co_op_enum'), server_default='Neither', nullable=False))
    op.drop_column('current_coops', 'active')
    ### end Alembic commands ###

def upgrade():
    classification_type_enum = postgresql.ENUM('binary', 'multi-label', 'multi-class', name='classification_type_enum')
    classification_type_enum.create(op.get_bind())
    # ### commands auto generated by Alembic - please adjust! ###
    op.add_column('problem', sa.Column('classification_type', sa.Enum('binary', 'multi-label', 'multi-class', name='classification_type_enum'), server_default='binary', nullable=True))
    op.execute('''
        UPDATE "problem" SET classification_type = 'multi-class' WHERE (SELECT COUNT(*) FROM "problem_label" WHERE problem_id = problem.id) >= 2
    ''')
    # ### end Alembic commands ###

def downgrade():
    # ### commands auto generated by Alembic - please adjust! ###
    op.drop_column('problem', 'classification_type')
    classification_type_enum = postgresql.ENUM('binary', 'multi-label', 'multi-class', name='classification_type_enum')
    classification_type_enum.drop(op.get_bind())
    # ### end Alembic commands ###

def downgrade():
    ### commands auto generated by Alembic - please adjust! ###
    op.add_column('rule', sa.Column('config', postgresql.JSONB(), autoincrement=False, nullable=True))
    op.add_column('rule', sa.Column('type', sa.VARCHAR(), autoincrement=False, nullable=False))
    op.add_column('rule', sa.Column('action', postgresql.ENUM(u'added', u'removed', u'both', name='rule_actions'), autoincrement=False, nullable=False))
    op.drop_column('rule', 'description')
    op.drop_column('rule', 'conditions')
    ### end Alembic commands ###

def downgrade():
    ### commands auto generated by Alembic - please adjust! ###
    op.drop_table('rule')
    ### end Alembic commands ###
    postgresql.ENUM(name='rule_actions').drop(op.get_bind(), checkfirst=False)

def downgrade():
    """Downgrade the database to an older revision."""
    # ### commands auto generated by Alembic - please adjust! ###
    conn = op.get_bind()
    conn.execute("DELETE FROM ecosystems WHERE name = 'nuget'")

    # There's no 'ALTER TYPE enum REMOVE VALUE'
    op.alter_column('package_gh_usage', 'ecosystem_backend',
                    existing_type=postgresql.ENUM('none', 'npm', 'maven', 'pypi', 'rubygems',
                                                  'scm', 'crates', 'nuget',
                                                  name='ecosystem_backend_enum'),
                    type_=postgresql.ENUM('none', 'npm', 'maven', 'pypi', 'rubygems', 'scm',
                                          'crates', name='ecosystem_backend_enum'),
                    existing_nullable=True)
    op.alter_column('ecosystems', '_backend',
                    existing_type=sa.Enum('none', 'npm', 'maven', 'pypi', 'rubygems', 'scm',
                                          'crates', 'nuget', name='ecosystem_backend_enum'),
                    type_=sa.Enum('none', 'npm', 'maven', 'pypi', 'rubygems', 'scm', 'crates',
                                  name='ecosystem_backend_enum'),
                    existing_nullable=True)
    op.alter_column('component_gh_usage', 'ecosystem_backend',
                    existing_type=postgresql.ENUM('none', 'npm', 'maven', 'pypi', 'rubygems',
                                                  'scm', 'crates', 'nuget',
                                                  name='ecosystem_backend_enum'),
                    type_=postgresql.ENUM('none', 'npm', 'maven', 'pypi', 'rubygems', 'scm',
                                          'crates', name='ecosystem_backend_enum'),
                    existing_nullable=True)
    # ### end Alembic commands ###

def upgrade():
    # ### commands auto generated by Alembic - please adjust! ###

    consent_type_type = postgresql.ENUM('FORM', 'INFORMATION_SHEET', name='consent_type_type')
    consent_type_type.create(op.get_bind())

    op.add_column('consents', sa.Column('consent_type', sa.Enum('FORM', 'INFORMATION_SHEET', name="consent_type_type"), nullable=True))
    consent_type = sa.table('consents', sa.column('consent_type'))
    op.execute(consent_type.update().values(consent_type='FORM'))
    op.alter_column('consents', 'consent_type', nullable=False)


    op.add_column('consents', sa.Column('weight', sa.Integer(), nullable=True))

    # ### end Alembic commands ###

def enum_column(enum_cls, name, metadata):
    class EnumColumn(_BaseEnumColumn):
        pass

    EnumColumn.enum_cls = enum_cls

    # Just as tables do, enum columns require metadata to bind to.
    EnumColumn.impl = ENUM(*(e.value for e in enum_cls), name=name, metadata=metadata)

    EnumColumn.reverse_enum_values = {e.value: e for e in enum_cls}
    EnumColumn.__name__ = str('EnumColumn_' + name)
    return EnumColumn()

def _prep_testing_database(options, file_config):
    from sqlalchemy.testing import config, util
    from sqlalchemy.testing.exclusions import against
    from sqlalchemy import schema, inspect

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            util.drop_all_tables(e, inspector)

            if config.requirements.schemas.enabled_for_config(cfg):
                util.drop_all_tables(e, inspector, schema=cfg.test_schema)

            if against(cfg, "postgresql"):
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def _prep_testing_database(options, file_config):
    from alembic.testing import config
    from alembic.testing.exclusions import against
    from sqlalchemy import schema
    from alembic import util

    if util.sqla_08:
        from sqlalchemy import inspect
    else:
        from sqlalchemy.engine.reflection import Inspector
        inspect = Inspector.from_engine

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            for tname in reversed(inspector.get_table_names(
                    order_by="foreign_key")):
                e.execute(schema.DropTable(
                    schema.Table(tname, schema.MetaData())
                ))

            if config.requirements.schemas.enabled_for_config(cfg):
                for tname in reversed(inspector.get_table_names(
                        order_by="foreign_key", schema="test_schema")):
                    e.execute(schema.DropTable(
                        schema.Table(tname, schema.MetaData(),
                                     schema="test_schema")
                    ))

            if against(cfg, "postgresql") and util.sqla_100:
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def _prep_testing_database(options, file_config):
    from sqlalchemy.testing import config, util
    from sqlalchemy.testing.exclusions import against
    from sqlalchemy import schema, inspect

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            util.drop_all_tables(e, inspector)

            if config.requirements.schemas.enabled_for_config(cfg):
                util.drop_all_tables(e, inspector, schema=cfg.test_schema)

            if against(cfg, "postgresql"):
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def _prep_testing_database(options, file_config):
    from sqlalchemy.testing import config, util
    from sqlalchemy.testing.exclusions import against
    from sqlalchemy import schema, inspect

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            util.drop_all_tables(e, inspector)

            if config.requirements.schemas.enabled_for_config(cfg):
                util.drop_all_tables(e, inspector, schema=cfg.test_schema)

            if against(cfg, "postgresql"):
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def _prep_testing_database(options, file_config):
    from alembic.testing import config
    from alembic.testing.exclusions import against
    from sqlalchemy import schema
    from alembic import util

    if util.sqla_08:
        from sqlalchemy import inspect
    else:
        from sqlalchemy.engine.reflection import Inspector
        inspect = Inspector.from_engine

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            for tname in reversed(inspector.get_table_names(
                    order_by="foreign_key")):
                e.execute(schema.DropTable(
                    schema.Table(tname, schema.MetaData())
                ))

            if config.requirements.schemas.enabled_for_config(cfg):
                for tname in reversed(inspector.get_table_names(
                        order_by="foreign_key", schema="test_schema")):
                    e.execute(schema.DropTable(
                        schema.Table(tname, schema.MetaData(),
                                     schema="test_schema")
                    ))

            if against(cfg, "postgresql") and util.sqla_100:
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def _prep_testing_database(options, file_config):
    from sqlalchemy.testing import config, util
    from sqlalchemy.testing.exclusions import against
    from sqlalchemy import schema, inspect

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            util.drop_all_tables(e, inspector)

            if config.requirements.schemas.enabled_for_config(cfg):
                util.drop_all_tables(e, inspector, schema=cfg.test_schema)

            if against(cfg, "postgresql"):
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def _prep_testing_database(options, file_config):
    from alembic.testing import config
    from alembic.testing.exclusions import against
    from sqlalchemy import schema
    from alembic import util

    if util.sqla_08:
        from sqlalchemy import inspect
    else:
        from sqlalchemy.engine.reflection import Inspector
        inspect = Inspector.from_engine

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            for tname in reversed(inspector.get_table_names(
                    order_by="foreign_key")):
                e.execute(schema.DropTable(
                    schema.Table(tname, schema.MetaData())
                ))

            if config.requirements.schemas.enabled_for_config(cfg):
                for tname in reversed(inspector.get_table_names(
                        order_by="foreign_key", schema="test_schema")):
                    e.execute(schema.DropTable(
                        schema.Table(tname, schema.MetaData(),
                                     schema="test_schema")
                    ))

            if against(cfg, "postgresql") and util.sqla_100:
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def _prep_testing_database(options, file_config):
    from sqlalchemy.testing import config, util
    from sqlalchemy.testing.exclusions import against
    from sqlalchemy import schema, inspect

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            util.drop_all_tables(e, inspector)

            if config.requirements.schemas.enabled_for_config(cfg):
                util.drop_all_tables(e, inspector, schema=cfg.test_schema)

            if against(cfg, "postgresql"):
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def _prep_testing_database(options, file_config):
    from alembic.testing import config
    from alembic.testing.exclusions import against
    from sqlalchemy import schema
    from alembic import util

    if util.sqla_08:
        from sqlalchemy import inspect
    else:
        from sqlalchemy.engine.reflection import Inspector
        inspect = Inspector.from_engine

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            for tname in reversed(inspector.get_table_names(
                    order_by="foreign_key")):
                e.execute(schema.DropTable(
                    schema.Table(tname, schema.MetaData())
                ))

            if config.requirements.schemas.enabled_for_config(cfg):
                for tname in reversed(inspector.get_table_names(
                        order_by="foreign_key", schema="test_schema")):
                    e.execute(schema.DropTable(
                        schema.Table(tname, schema.MetaData(),
                                     schema="test_schema")
                    ))

            if against(cfg, "postgresql") and util.sqla_100:
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def _prep_testing_database(options, file_config):
    from sqlalchemy.testing import config, util
    from sqlalchemy.testing.exclusions import against
    from sqlalchemy import schema, inspect

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            util.drop_all_tables(e, inspector)

            if config.requirements.schemas.enabled_for_config(cfg):
                util.drop_all_tables(e, inspector, schema=cfg.test_schema)

            if against(cfg, "postgresql"):
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def _prep_testing_database(options, file_config):
    from sqlalchemy.testing import config, util
    from sqlalchemy.testing.exclusions import against
    from sqlalchemy import schema, inspect

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            util.drop_all_tables(e, inspector)

            if config.requirements.schemas.enabled_for_config(cfg):
                util.drop_all_tables(e, inspector, schema=cfg.test_schema)

            if against(cfg, "postgresql"):
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def _prep_testing_database(options, file_config):
    from sqlalchemy.testing import config, util
    from sqlalchemy.testing.exclusions import against
    from sqlalchemy import schema, inspect

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            util.drop_all_tables(e, inspector)

            if config.requirements.schemas.enabled_for_config(cfg):
                util.drop_all_tables(e, inspector, schema=cfg.test_schema)

            if against(cfg, "postgresql"):
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def _prep_testing_database(options, file_config):
    from alembic.testing import config
    from alembic.testing.exclusions import against
    from sqlalchemy import schema
    from alembic import util

    if util.sqla_08:
        from sqlalchemy import inspect
    else:
        from sqlalchemy.engine.reflection import Inspector
        inspect = Inspector.from_engine

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            for tname in reversed(inspector.get_table_names(
                    order_by="foreign_key")):
                e.execute(schema.DropTable(
                    schema.Table(tname, schema.MetaData())
                ))

            if config.requirements.schemas.enabled_for_config(cfg):
                for tname in reversed(inspector.get_table_names(
                        order_by="foreign_key", schema="test_schema")):
                    e.execute(schema.DropTable(
                        schema.Table(tname, schema.MetaData(),
                                     schema="test_schema")
                    ))

            if against(cfg, "postgresql") and util.sqla_100:
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def _prep_testing_database(options, file_config):
    from sqlalchemy.testing import config, util
    from sqlalchemy.testing.exclusions import against
    from sqlalchemy import schema, inspect

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            util.drop_all_tables(e, inspector)

            if config.requirements.schemas.enabled_for_config(cfg):
                util.drop_all_tables(e, inspector, schema=cfg.test_schema)

            if against(cfg, "postgresql"):
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def _prep_testing_database(options, file_config):
    from sqlalchemy.testing import config, util
    from sqlalchemy.testing.exclusions import against
    from sqlalchemy import schema, inspect

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            util.drop_all_tables(e, inspector)

            if config.requirements.schemas.enabled_for_config(cfg):
                util.drop_all_tables(e, inspector, schema=cfg.test_schema)

            if against(cfg, "postgresql"):
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def _prep_testing_database(options, file_config):
    from alembic.testing import config
    from alembic.testing.exclusions import against
    from sqlalchemy import schema
    from alembic import util

    if util.sqla_08:
        from sqlalchemy import inspect
    else:
        from sqlalchemy.engine.reflection import Inspector
        inspect = Inspector.from_engine

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            for tname in reversed(inspector.get_table_names(
                    order_by="foreign_key")):
                e.execute(schema.DropTable(
                    schema.Table(tname, schema.MetaData())
                ))

            if config.requirements.schemas.enabled_for_config(cfg):
                for tname in reversed(inspector.get_table_names(
                        order_by="foreign_key", schema="test_schema")):
                    e.execute(schema.DropTable(
                        schema.Table(tname, schema.MetaData(),
                                     schema="test_schema")
                    ))

            if against(cfg, "postgresql") and util.sqla_100:
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def _prep_testing_database(options, file_config):
    from sqlalchemy.testing import config, util
    from sqlalchemy.testing.exclusions import against
    from sqlalchemy import schema, inspect

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            util.drop_all_tables(e, inspector)

            if config.requirements.schemas.enabled_for_config(cfg):
                util.drop_all_tables(e, inspector, schema=cfg.test_schema)

            if against(cfg, "postgresql"):
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def _prep_testing_database(options, file_config):
    from alembic.testing import config
    from alembic.testing.exclusions import against
    from sqlalchemy import schema
    from alembic import util

    if util.sqla_08:
        from sqlalchemy import inspect
    else:
        from sqlalchemy.engine.reflection import Inspector
        inspect = Inspector.from_engine

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            for tname in reversed(inspector.get_table_names(
                    order_by="foreign_key")):
                e.execute(schema.DropTable(
                    schema.Table(tname, schema.MetaData())
                ))

            if config.requirements.schemas.enabled_for_config(cfg):
                for tname in reversed(inspector.get_table_names(
                        order_by="foreign_key", schema="test_schema")):
                    e.execute(schema.DropTable(
                        schema.Table(tname, schema.MetaData(),
                                     schema="test_schema")
                    ))

            if against(cfg, "postgresql") and util.sqla_100:
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def _prep_testing_database(options, file_config):
    from sqlalchemy.testing import config, util
    from sqlalchemy.testing.exclusions import against
    from sqlalchemy import schema, inspect

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            util.drop_all_tables(e, inspector)

            if config.requirements.schemas.enabled_for_config(cfg):
                util.drop_all_tables(e, inspector, schema=cfg.test_schema)

            if against(cfg, "postgresql"):
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def _prep_testing_database(options, file_config):
    from alembic.testing import config
    from alembic.testing.exclusions import against
    from sqlalchemy import schema
    from alembic import util

    if util.sqla_08:
        from sqlalchemy import inspect
    else:
        from sqlalchemy.engine.reflection import Inspector
        inspect = Inspector.from_engine

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            for tname in reversed(inspector.get_table_names(
                    order_by="foreign_key")):
                e.execute(schema.DropTable(
                    schema.Table(tname, schema.MetaData())
                ))

            if config.requirements.schemas.enabled_for_config(cfg):
                for tname in reversed(inspector.get_table_names(
                        order_by="foreign_key", schema="test_schema")):
                    e.execute(schema.DropTable(
                        schema.Table(tname, schema.MetaData(),
                                     schema="test_schema")
                    ))

            if against(cfg, "postgresql") and util.sqla_100:
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def _prep_testing_database(options, file_config):
    from sqlalchemy.testing import config, util
    from sqlalchemy.testing.exclusions import against
    from sqlalchemy import schema, inspect

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            util.drop_all_tables(e, inspector)

            if config.requirements.schemas.enabled_for_config(cfg):
                util.drop_all_tables(e, inspector, schema=cfg.test_schema)

            if against(cfg, "postgresql"):
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def _prep_testing_database(options, file_config):
    from alembic.testing import config
    from alembic.testing.exclusions import against
    from sqlalchemy import schema
    from alembic import util

    if util.sqla_08:
        from sqlalchemy import inspect
    else:
        from sqlalchemy.engine.reflection import Inspector
        inspect = Inspector.from_engine

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            for tname in reversed(inspector.get_table_names(
                    order_by="foreign_key")):
                e.execute(schema.DropTable(
                    schema.Table(tname, schema.MetaData())
                ))

            if config.requirements.schemas.enabled_for_config(cfg):
                for tname in reversed(inspector.get_table_names(
                        order_by="foreign_key", schema="test_schema")):
                    e.execute(schema.DropTable(
                        schema.Table(tname, schema.MetaData(),
                                     schema="test_schema")
                    ))

            if against(cfg, "postgresql") and util.sqla_100:
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def _prep_testing_database(options, file_config):
    from sqlalchemy.testing import config, util
    from sqlalchemy.testing.exclusions import against
    from sqlalchemy import schema, inspect

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            util.drop_all_tables(e, inspector)

            if config.requirements.schemas.enabled_for_config(cfg):
                util.drop_all_tables(e, inspector, schema=cfg.test_schema)

            if against(cfg, "postgresql"):
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def upgrade():
    # ### commands auto generated by Alembic - please adjust! ###
    op.create_table('credential',
    sa.Column('id', sa.Integer(), nullable=False),
    sa.Column('user_id', sa.Integer(), nullable=False),
    sa.Column('type', postgresql.ENUM('username', 'admin', name='credential_types'), nullable=False),
    sa.Column('key', sa.String(length=255), nullable=False),
    sa.Column('value', sa.String(length=255), nullable=True),
    sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text(u'now()'), nullable=False),
    sa.PrimaryKeyConstraint('id'),
    sa.UniqueConstraint('key')
    )
    op.create_table('photo',
    sa.Column('id', sa.String(length=36), nullable=False),
    sa.Column('user_id', sa.Integer(), nullable=True),
    sa.Column('original_width', sa.Integer(), nullable=True),
    sa.Column('original_height', sa.Integer(), nullable=True),
    sa.PrimaryKeyConstraint('id')
    )
    op.create_table('post',
    sa.Column('id', sa.Integer(), nullable=False),
    sa.Column('photo_id', sa.String(length=36), nullable=True),
    sa.Column('message', sa.Text(), nullable=True),
    sa.Column('user_id', sa.Integer(), nullable=False),
    sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text(u'now()'), nullable=False),
    sa.PrimaryKeyConstraint('id')
    )
    op.create_table('user',
    sa.Column('id', sa.Integer(), nullable=False),
    sa.Column('username', sa.String(length=80), nullable=False),
    sa.Column('photo_id', sa.String(length=36), nullable=True),
    sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text(u'now()'), nullable=False),
    sa.PrimaryKeyConstraint('id')
    )

    op.create_foreign_key(
        'credential_user_id_fkey',
        'credential', 'user',
        ['user_id'], ['id'],
    )
    op.create_foreign_key(
        'photo_user_id_fkey',
        'photo', 'user',
        ['user_id'], ['id'],
    )
    op.create_foreign_key(
        'post_photo_id_fkey',
        'post', 'photo',
        ['photo_id'], ['id'],
    )
    op.create_foreign_key(
        'post_user_id_fkey',
        'post', 'user',
        ['user_id'], ['id'],
    )
    op.create_foreign_key(
        'user_photo_id_fkey',
        'user', 'photo',
        ['photo_id'], ['id'],
    )
    # ### end Alembic commands ###

def _prep_testing_database(options, file_config):
    from sqlalchemy.testing import config, util
    from sqlalchemy.testing.exclusions import against
    from sqlalchemy import schema, inspect

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            util.drop_all_tables(e, inspector)

            if config.requirements.schemas.enabled_for_config(cfg):
                util.drop_all_tables(e, inspector, schema=cfg.test_schema)

            if against(cfg, "postgresql"):
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))

def _prep_testing_database(options, file_config):
    from sqlalchemy.testing import config, util
    from sqlalchemy.testing.exclusions import against
    from sqlalchemy import schema, inspect

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            util.drop_all_tables(e, inspector)

            if config.requirements.schemas.enabled_for_config(cfg):
                util.drop_all_tables(e, inspector, schema=cfg.test_schema)

            if against(cfg, "postgresql"):
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))