Python django.db.models 模块，AutoField() 实例源码

def sequence_list(self):
        "Returns a list of information about all DB sequences for all models in all apps."
        from django.apps import apps
        from django.db import models, router

        sequence_list = []

        for app_config in apps.get_app_configs():
            for model in router.get_migratable_models(app_config, self.connection.alias):
                if not model._meta.managed:
                    continue
                if model._meta.swapped:
                    continue
                for f in model._meta.local_fields:
                    if isinstance(f, models.AutoField):
                        sequence_list.append({'table': model._meta.db_table, 'column': f.column})
                        break  # Only one AutoField is allowed per model, so don't bother continuing.

                for f in model._meta.local_many_to_many:
                    # If this is an m2m using an intermediate table,
                    # we don't need to reset the sequence.
                    if f.rel.through is None:
                        sequence_list.append({'table': f.m2m_db_table(), 'column': None})

        return sequence_list

def set_up_test_model(self):
        operations = [
            migrations.CreateModel(
                "Pony",
                [
                    ('pony_id', models.AutoField(primary_key=True)),
                    ('pink', models.IntegerField(default=3)),
                    ('weight', models.FloatField())
                ],
            ),
            migrations.CreateModel(
                'Rider',
                [
                    ('rider_id', models.AutoField(primary_key=True)),
                    ('pony', models.ForeignKey('Pony', on_delete=models.CASCADE))
                ],
            ),
        ]
        return self.apply_operations('tests', ProjectState(), operations)

def test_demo_schemata_get_migrated(self):
        user = User.objects.create_user(**CREDENTIALS)
        schema = DemoSchema.objects.create(user=user, from_template=self.template)

        operation = migrations.CreateModel("Pony", [
            ('pony_id', models.AutoField(primary_key=True)),
            ('pink', models.IntegerField(default=1)),
        ])
        project_state = ProjectState()
        new_state = project_state.clone()
        operation.state_forwards('tests', new_state)

        schema.activate()
        self.assertFalse('tests_pony' in get_table_list())

        with connection.schema_editor() as editor:
            operation.database_forwards('tests', editor, project_state, new_state)
        schema.activate()
        self.assertTrue('tests_pony' in get_table_list())

        with connection.schema_editor() as editor:
            operation.database_backwards('tests', editor, new_state, project_state)
        schema.activate()
        self.assertFalse('tests_pony' in get_table_list())

def backwards(self, orm):

        # Rename field 'file._file'
        db.rename_column('filer_file', 'file', '_file')

        # Deleting field 'File.is_public'
        db.delete_column('filer_file', 'is_public')

        # no need to do this. south just *thinks* something has changed, because it did not know anything about through in earlier versions

        # Adding M2M table for field files on 'clipboard'
#        db.create_table('filer_clipboard_files', (
#            ('id', models.AutoField(verbose_name='ID', primary_key=True, auto_created=True)),
#            ('clipboard', models.ForeignKey(orm['filer.clipboard'], null=False)),
#            ('file', models.ForeignKey(orm['filer.file'], null=False))
#        ))
#        db.create_unique('filer_clipboard_files', ['clipboard_id', 'file_id'])

def sequence_reset_sql(self, style, model_list):
        from django.db import models
        output = []
        query = self._sequence_reset_sql
        for model in model_list:
            for f in model._meta.local_fields:
                if isinstance(f, models.AutoField):
                    table_name = self.quote_name(model._meta.db_table)
                    sequence_name = self._get_sequence_name(model._meta.db_table)
                    column_name = self.quote_name(f.column)
                    output.append(query % {'sequence': sequence_name,
                                           'table': table_name,
                                           'column': column_name})
                    # Only one AutoField is allowed per model, so don't
                    # continue to loop
                    break
            for f in model._meta.many_to_many:
                if not f.remote_field.through:
                    table_name = self.quote_name(f.m2m_db_table())
                    sequence_name = self._get_sequence_name(f.m2m_db_table())
                    column_name = self.quote_name('id')
                    output.append(query % {'sequence': sequence_name,
                                           'table': table_name,
                                           'column': column_name})
        return output

def sequence_list(self):
        "Returns a list of information about all DB sequences for all models in all apps."
        from django.apps import apps
        from django.db import models, router

        sequence_list = []

        for app_config in apps.get_app_configs():
            for model in router.get_migratable_models(app_config, self.connection.alias):
                if not model._meta.managed:
                    continue
                if model._meta.swapped:
                    continue
                for f in model._meta.local_fields:
                    if isinstance(f, models.AutoField):
                        sequence_list.append({'table': model._meta.db_table, 'column': f.column})
                        break  # Only one AutoField is allowed per model, so don't bother continuing.

                for f in model._meta.local_many_to_many:
                    # If this is an m2m using an intermediate table,
                    # we don't need to reset the sequence.
                    if f.remote_field.through is None:
                        sequence_list.append({'table': f.m2m_db_table(), 'column': None})

        return sequence_list

def change_models(self, queryset, cleaned_data):
        n = queryset.count()

        data = {}
        fields = self.opts.fields + self.opts.many_to_many
        for f in fields:
            if not f.editable or isinstance(f, models.AutoField) \
                    or not f.name in cleaned_data:
                continue
            data[f] = cleaned_data[f.name]

        if n:
            for obj in queryset:
                for f, v in data.items():
                    f.save_form_data(obj, v)
                obj.save()
            self.message_user(_("Successfully change %(count)d %(items)s.") % {
                "count": n, "items": model_ngettext(self.opts, n)
            }, 'success')

def construct_instance(form, instance, fields=None, exclude=None):
    """
    Constructs and returns a model instance from the bound ``form``'s
    ``cleaned_data``, but does not save the returned instance to the
    database.
    """
    from django.db import models
    opts = instance._meta

    cleaned_data = form.cleaned_data
    file_field_list = []
    for f in opts.fields:
        if not f.editable or isinstance(f, models.AutoField) \
                or f.name not in cleaned_data:
            continue
        if fields is not None and f.name not in fields:
            continue
        if exclude and f.name in exclude:
            continue
        # Leave defaults for fields that aren't in POST data, except for
        # checkbox inputs because they don't appear in POST data if not checked.
        if (f.has_default() and
                form[f.name].field.widget.value_omitted_from_data(form.data, form.files, form.add_prefix(f.name))):
            continue
        # Defer saving file-type fields until after the other fields, so a
        # callable upload_to can use the values from other fields.
        if isinstance(f, models.FileField):
            file_field_list.append(f)
        else:
            f.save_form_data(instance, cleaned_data[f.name])

    for f in file_field_list:
        f.save_form_data(instance, cleaned_data[f.name])

    return instance


# ModelForms #################################################################

def change_models(self, queryset, cleaned_data):
        n = queryset.count()

        data = {}
        fields = self.opts.fields + self.opts.many_to_many
        for f in fields:
            if not f.editable or isinstance(f, models.AutoField) \
                    or not f.name in cleaned_data:
                continue
            data[f] = cleaned_data[f.name]

        if n:
            for obj in queryset:
                for f, v in data.items():
                    f.save_form_data(obj, v)
                obj.save()
            self.message_user(_("Successfully change %(count)d %(items)s.") % {
                "count": n, "items": model_ngettext(self.opts, n)
            }, 'success')

def change_models(self, queryset, cleaned_data):
        n = queryset.count()

        data = {}
        fields = self.opts.fields + self.opts.many_to_many
        for f in fields:
            if not f.editable or isinstance(f, models.AutoField) \
                    or not f.name in cleaned_data:
                continue
            data[f] = cleaned_data[f.name]

        if n:
            for obj in queryset:
                for f, v in data.items():
                    f.save_form_data(obj, v)
                obj.save()
            self.message_user(_("Successfully change %(count)d %(items)s.") % {
                "count": n, "items": model_ngettext(self.opts, n)
            }, 'success')

def change_models(self, queryset, cleaned_data):
        n = queryset.count()

        data = {}
        fields = self.opts.fields + self.opts.many_to_many
        for f in fields:
            if not f.editable or isinstance(f, models.AutoField) \
                    or not f.name in cleaned_data:
                continue
            data[f] = cleaned_data[f.name]

        if n:
            for obj in queryset:
                for f, v in data.items():
                    f.save_form_data(obj, v)
                obj.save()
            self.message_user(_("Successfully change %(count)d %(items)s.") % {
                "count": n, "items": model_ngettext(self.opts, n)
            }, 'success')

def change_models(self, queryset, cleaned_data):
        n = queryset.count()

        data = {}
        fields = self.opts.fields + self.opts.many_to_many
        for f in fields:
            if not f.editable or isinstance(f, models.AutoField) \
                    or not f.name in cleaned_data:
                continue
            data[f] = cleaned_data[f.name]

        if n:
            for obj in queryset:
                for f, v in data.items():
                    f.save_form_data(obj, v)
                obj.save()
            self.message_user(_("Successfully change %(count)d %(items)s.") % {
                "count": n, "items": model_ngettext(self.opts, n)
            }, 'success')

def sequence_reset_sql(self, style, model_list):
        from django.db import models
        output = []
        query = self._sequence_reset_sql
        for model in model_list:
            for f in model._meta.local_fields:
                if isinstance(f, models.AutoField):
                    table_name = self.quote_name(model._meta.db_table)
                    sequence_name = self._get_sequence_name(model._meta.db_table)
                    column_name = self.quote_name(f.column)
                    output.append(query % {'sequence': sequence_name,
                                           'table': table_name,
                                           'column': column_name})
                    # Only one AutoField is allowed per model, so don't
                    # continue to loop
                    break
            for f in model._meta.many_to_many:
                if not f.rel.through:
                    table_name = self.quote_name(f.m2m_db_table())
                    sequence_name = self._get_sequence_name(f.m2m_db_table())
                    column_name = self.quote_name('id')
                    output.append(query % {'sequence': sequence_name,
                                           'table': table_name,
                                           'column': column_name})
        return output

def change_models(self, queryset, cleaned_data):
        n = queryset.count()

        data = {}
        fields = self.opts.fields + self.opts.many_to_many
        for f in fields:
            if not f.editable or isinstance(f, models.AutoField) \
                    or not f.name in cleaned_data:
                continue
            data[f] = cleaned_data[f.name]

        if n:
            for obj in queryset:
                for f, v in data.items():
                    f.save_form_data(obj, v)
                obj.save()
            self.message_user(_("Successfully change %(count)d %(items)s.") % {
                "count": n, "items": model_ngettext(self.opts, n)
            }, 'success')

def forwards(self, orm):
        # Adding model 'Project'
        db.create_table('api_project', (
            ('id', self.gf('django.db.models.fields.AutoField')(primary_key=True)),
            ('name', self.gf('django.db.models.fields.CharField')(max_length=255)),
            ('organization', self.gf('django.db.models.fields.related.ForeignKey')(related_name='project_organization', to=orm['auth.User'])),
            ('created_by', self.gf('django.db.models.fields.related.ForeignKey')(related_name='project_creator', to=orm['auth.User'])),
            ('date_created', self.gf('django.db.models.fields.DateTimeField')(auto_now_add=True, blank=True)),
            ('date_modified', self.gf('django.db.models.fields.DateTimeField')(auto_now=True, blank=True)),
        ))
        db.send_create_signal('api', ['Project'])

        # Adding unique constraint on 'Project', fields ['name', 'organization']
        db.create_unique('api_project', ['name', 'organization_id'])

        # Adding M2M table for field projects on 'Team'
        db.create_table('api_team_projects', (
            ('id', models.AutoField(verbose_name='ID', primary_key=True, auto_created=True)),
            ('team', models.ForeignKey(orm['api.team'], null=False)),
            ('project', models.ForeignKey(orm['api.project'], null=False))
        ))
        db.create_unique('api_team_projects', ['team_id', 'project_id'])

def sequence_reset_sql(self, style, model_list):
        from django.db import models
        output = []
        query = self._sequence_reset_sql
        for model in model_list:
            for f in model._meta.local_fields:
                if isinstance(f, models.AutoField):
                    table_name = self.quote_name(model._meta.db_table)
                    sequence_name = self._get_sequence_name(model._meta.db_table)
                    column_name = self.quote_name(f.column)
                    output.append(query % {'sequence': sequence_name,
                                           'table': table_name,
                                           'column': column_name})
                    # Only one AutoField is allowed per model, so don't
                    # continue to loop
                    break
            for f in model._meta.many_to_many:
                if not f.rel.through:
                    table_name = self.quote_name(f.m2m_db_table())
                    sequence_name = self._get_sequence_name(f.m2m_db_table())
                    column_name = self.quote_name('id')
                    output.append(query % {'sequence': sequence_name,
                                           'table': table_name,
                                           'column': column_name})
        return output

def change_models(self, queryset, cleaned_data):
        n = queryset.count()

        data = {}
        for f in self.opts.fields:
            if not f.editable or isinstance(f, models.AutoField) \
                    or not f.name in cleaned_data:
                continue
            data[f] = cleaned_data[f.name]

        if n:
            for obj in queryset:
                for f, v in data.items():
                    f.save_form_data(obj, v)
                obj.save()
            self.message_user(_("Successfully change %(count)d %(items)s.") % {
                "count": n, "items": model_ngettext(self.opts, n)
            }, 'success')

def forwards(self, orm):
        # Adding model 'Project'
        db.create_table(u'projects_project', (
            (u'id', self.gf('django.db.models.fields.AutoField')(primary_key=True)),
            ('team', self.gf('django.db.models.fields.related.ForeignKey')(to=orm['teams.Team'], null=True, blank=True)),
            ('added_by', self.gf('django.db.models.fields.related.ForeignKey')(related_name='added_projects', to=orm['accounts.Account'])),
            ('name', self.gf('django.db.models.fields.CharField')(max_length=32)),
            ('description', self.gf('django.db.models.fields.TextField')()),
        ))
        db.send_create_signal(u'projects', ['Project'])

        # Adding M2M table for field members on 'Project'
        m2m_table_name = db.shorten_name(u'projects_project_members')
        db.create_table(m2m_table_name, (
            ('id', models.AutoField(verbose_name='ID', primary_key=True, auto_created=True)),
            ('project', models.ForeignKey(orm[u'projects.project'], null=False)),
            ('account', models.ForeignKey(orm[u'accounts.account'], null=False))
        ))
        db.create_unique(m2m_table_name, ['project_id', 'account_id'])

def forwards(self, orm):
        # Adding field 'Account.is_superuser'
        db.add_column(u'accounts_account', 'is_superuser',
                      self.gf('django.db.models.fields.BooleanField')(default=False),
                      keep_default=False)

        # Adding M2M table for field groups on 'Account'
        m2m_table_name = db.shorten_name(u'accounts_account_groups')
        db.create_table(m2m_table_name, (
            ('id', models.AutoField(verbose_name='ID', primary_key=True, auto_created=True)),
            ('account', models.ForeignKey(orm[u'accounts.account'], null=False)),
            ('group', models.ForeignKey(orm[u'auth.group'], null=False))
        ))
        db.create_unique(m2m_table_name, ['account_id', 'group_id'])

        # Adding M2M table for field user_permissions on 'Account'
        m2m_table_name = db.shorten_name(u'accounts_account_user_permissions')
        db.create_table(m2m_table_name, (
            ('id', models.AutoField(verbose_name='ID', primary_key=True, auto_created=True)),
            ('account', models.ForeignKey(orm[u'accounts.account'], null=False)),
            ('permission', models.ForeignKey(orm[u'auth.permission'], null=False))
        ))
        db.create_unique(m2m_table_name, ['account_id', 'permission_id'])

def sequence_reset_sql(self, style, model_list):
        from django.db import models
        output = []
        query = self._sequence_reset_sql
        for model in model_list:
            for f in model._meta.local_fields:
                if isinstance(f, models.AutoField):
                    table_name = self.quote_name(model._meta.db_table)
                    sequence_name = self._get_sequence_name(model._meta.db_table)
                    column_name = self.quote_name(f.column)
                    output.append(query % {'sequence': sequence_name,
                                           'table': table_name,
                                           'column': column_name})
                    # Only one AutoField is allowed per model, so don't
                    # continue to loop
                    break
            for f in model._meta.many_to_many:
                if not f.remote_field.through:
                    table_name = self.quote_name(f.m2m_db_table())
                    sequence_name = self._get_sequence_name(f.m2m_db_table())
                    column_name = self.quote_name('id')
                    output.append(query % {'sequence': sequence_name,
                                           'table': table_name,
                                           'column': column_name})
        return output

def sequence_list(self):
        "Returns a list of information about all DB sequences for all models in all apps."
        from django.apps import apps
        from django.db import models, router

        sequence_list = []

        for app_config in apps.get_app_configs():
            for model in router.get_migratable_models(app_config, self.connection.alias):
                if not model._meta.managed:
                    continue
                if model._meta.swapped:
                    continue
                for f in model._meta.local_fields:
                    if isinstance(f, models.AutoField):
                        sequence_list.append({'table': model._meta.db_table, 'column': f.column})
                        break  # Only one AutoField is allowed per model, so don't bother continuing.

                for f in model._meta.local_many_to_many:
                    # If this is an m2m using an intermediate table,
                    # we don't need to reset the sequence.
                    if f.remote_field.through is None:
                        sequence_list.append({'table': f.m2m_db_table(), 'column': None})

        return sequence_list

def change_models(self, queryset, cleaned_data):
        n = queryset.count()

        data = {}
        fields = self.opts.fields + self.opts.many_to_many
        for f in fields:
            if not f.editable or isinstance(f, models.AutoField) \
                    or not f.name in cleaned_data:
                continue
            data[f] = cleaned_data[f.name]

        if n:
            for obj in queryset:
                for f, v in data.items():
                    f.save_form_data(obj, v)
                obj.save()
            self.message_user(_("Successfully change %(count)d %(items)s.") % {
                "count": n, "items": model_ngettext(self.opts, n)
            }, 'success')

def change_models(self, queryset, cleaned_data):
        n = queryset.count()

        data = {}
        fields = self.opts.fields + self.opts.many_to_many
        for f in fields:
            if not f.editable or isinstance(f, models.AutoField) \
                    or not f.name in cleaned_data:
                continue
            data[f] = cleaned_data[f.name]

        if n:
            for obj in queryset:
                for f, v in data.items():
                    f.save_form_data(obj, v)
                obj.save()
            self.message_user(_("Successfully change %(count)d %(items)s.") % {
                "count": n, "items": model_ngettext(self.opts, n)
            }, 'success')

def change_models(self, queryset, cleaned_data):
        n = queryset.count()

        data = {}
        fields = self.opts.fields + self.opts.many_to_many
        for f in fields:
            if not f.editable or isinstance(f, models.AutoField) \
                    or not f.name in cleaned_data:
                continue
            data[f] = cleaned_data[f.name]

        if n:
            for obj in queryset:
                for f, v in data.items():
                    f.save_form_data(obj, v)
                obj.save()
            self.message_user(_("Successfully change %(count)d %(items)s.") % {
                "count": n, "items": model_ngettext(self.opts, n)
            }, 'success')

def backwards(self, orm):

        # Rename field 'file._file'
        db.rename_column('filer_file', 'file', '_file')

        # Deleting field 'File.is_public'
        db.delete_column('filer_file', 'is_public')

        # no need to do this. south just *thinks* something has changed, because it did not know anything about through in earlier versions

        # Adding M2M table for field files on 'clipboard'
#        db.create_table('filer_clipboard_files', (
#            ('id', models.AutoField(verbose_name='ID', primary_key=True, auto_created=True)),
#            ('clipboard', models.ForeignKey(orm['filer.clipboard'], null=False)),
#            ('file', models.ForeignKey(orm['filer.file'], null=False))
#        ))
#        db.create_unique('filer_clipboard_files', ['clipboard_id', 'file_id'])

def change_models(self, queryset, cleaned_data):
        n = queryset.count()

        data = {}
        for f in self.opts.fields:
            if not f.editable or isinstance(f, models.AutoField) \
                    or not f.name in cleaned_data:
                continue
            data[f] = cleaned_data[f.name]

        if n:
            for obj in queryset:
                for f, v in list(data.items()):
                    f.save_form_data(obj, v)
                obj.save()
            self.message_user(_("Successfully change %(count)d %(items)s.") % {
                "count": n, "items": model_ngettext(self.opts, n)
            }, 'success')

def sequence_reset_sql(self, style, model_list):
        from django.db import models
        output = []
        query = self._sequence_reset_sql
        for model in model_list:
            for f in model._meta.local_fields:
                if isinstance(f, models.AutoField):
                    table_name = self.quote_name(model._meta.db_table)
                    sequence_name = self._get_sequence_name(model._meta.db_table)
                    column_name = self.quote_name(f.column)
                    output.append(query % {'sequence': sequence_name,
                                           'table': table_name,
                                           'column': column_name})
                    # Only one AutoField is allowed per model, so don't
                    # continue to loop
                    break
            for f in model._meta.many_to_many:
                if not f.remote_field.through:
                    table_name = self.quote_name(f.m2m_db_table())
                    sequence_name = self._get_sequence_name(f.m2m_db_table())
                    column_name = self.quote_name('id')
                    output.append(query % {'sequence': sequence_name,
                                           'table': table_name,
                                           'column': column_name})
        return output

def sequence_list(self):
        "Returns a list of information about all DB sequences for all models in all apps."
        from django.apps import apps
        from django.db import models, router

        sequence_list = []

        for app_config in apps.get_app_configs():
            for model in router.get_migratable_models(app_config, self.connection.alias):
                if not model._meta.managed:
                    continue
                if model._meta.swapped:
                    continue
                for f in model._meta.local_fields:
                    if isinstance(f, models.AutoField):
                        sequence_list.append({'table': model._meta.db_table, 'column': f.column})
                        break  # Only one AutoField is allowed per model, so don't bother continuing.

                for f in model._meta.local_many_to_many:
                    # If this is an m2m using an intermediate table,
                    # we don't need to reset the sequence.
                    if f.remote_field.through is None:
                        sequence_list.append({'table': f.m2m_db_table(), 'column': None})

        return sequence_list

def sequence_reset_sql(self, style, model_list):
        from django.db import models
        output = []
        query = self._sequence_reset_sql
        for model in model_list:
            for f in model._meta.local_fields:
                if isinstance(f, models.AutoField):
                    table_name = self.quote_name(model._meta.db_table)
                    sequence_name = self._get_sequence_name(model._meta.db_table)
                    column_name = self.quote_name(f.column)
                    output.append(query % {'sequence': sequence_name,
                                           'table': table_name,
                                           'column': column_name})
                    # Only one AutoField is allowed per model, so don't
                    # continue to loop
                    break
            for f in model._meta.many_to_many:
                if not f.remote_field.through:
                    table_name = self.quote_name(f.m2m_db_table())
                    sequence_name = self._get_sequence_name(f.m2m_db_table())
                    column_name = self.quote_name('id')
                    output.append(query % {'sequence': sequence_name,
                                           'table': table_name,
                                           'column': column_name})
        return output

def sequence_list(self):
        "Returns a list of information about all DB sequences for all models in all apps."
        from django.apps import apps
        from django.db import models, router

        sequence_list = []

        for app_config in apps.get_app_configs():
            for model in router.get_migratable_models(app_config, self.connection.alias):
                if not model._meta.managed:
                    continue
                if model._meta.swapped:
                    continue
                for f in model._meta.local_fields:
                    if isinstance(f, models.AutoField):
                        sequence_list.append({'table': model._meta.db_table, 'column': f.column})
                        break  # Only one AutoField is allowed per model, so don't bother continuing.

                for f in model._meta.local_many_to_many:
                    # If this is an m2m using an intermediate table,
                    # we don't need to reset the sequence.
                    if f.remote_field.through is None:
                        sequence_list.append({'table': f.m2m_db_table(), 'column': None})

        return sequence_list

def change_models(self, queryset, cleaned_data):
        n = queryset.count()

        data = {}
        fields = self.opts.fields + self.opts.many_to_many
        for f in fields:
            if not f.editable or isinstance(f, models.AutoField) \
                    or not f.name in cleaned_data:
                continue
            data[f] = cleaned_data[f.name]

        if n:
            for obj in queryset:
                for f, v in data.items():
                    f.save_form_data(obj, v)
                obj.save()
            self.message_user(_("Successfully change %(count)d %(items)s.") % {
                "count": n, "items": model_ngettext(self.opts, n)
            }, 'success')

def change_models(self, queryset, cleaned_data):
        n = queryset.count()

        data = {}
        fields = self.opts.fields + self.opts.many_to_many
        for f in fields:
            if not f.editable or isinstance(f, models.AutoField) \
                    or not f.name in cleaned_data:
                continue
            data[f] = cleaned_data[f.name]

        if n:
            for obj in queryset:
                for f, v in data.items():
                    f.save_form_data(obj, v)
                obj.save()
            self.message_user(_("Successfully change %(count)d %(items)s.") % {
                "count": n, "items": model_ngettext(self.opts, n)
            }, 'success')

def change_models(self, queryset, cleaned_data):
        n = queryset.count()

        data = {}
        fields = self.opts.fields + self.opts.many_to_many
        for f in fields:
            if not f.editable or isinstance(f, models.AutoField) \
                    or not f.name in cleaned_data:
                continue
            data[f] = cleaned_data[f.name]

        if n:
            for obj in queryset:
                for f, v in data.items():
                    f.save_form_data(obj, v)
                obj.save()
            self.message_user(_("Successfully change %(count)d %(items)s.") % {
                "count": n, "items": model_ngettext(self.opts, n)
            }, 'success')

def test_migrations_apply_to_templates(self):
        template = SchemaTemplate.objects.create(name='a')
        operation = migrations.CreateModel("Pony", [
            ('pony_id', models.AutoField(primary_key=True)),
            ('pink', models.IntegerField(default=1)),
        ])
        project_state = ProjectState()
        new_state = project_state.clone()
        operation.state_forwards('tests', new_state)

        template.activate()
        self.assertFalse('tests_pony' in get_table_list())

        with connection.schema_editor() as editor:
            operation.database_forwards('tests', editor, project_state, new_state)
        template.activate()
        self.assertTrue('tests_pony' in get_table_list())

        with connection.schema_editor() as editor:
            operation.database_backwards('tests', editor, new_state, project_state)
        template.activate()
        self.assertFalse('tests_pony' in get_table_list())

def change_models(self, queryset, cleaned_data):
        n = queryset.count()

        data = {}
        fields = self.opts.fields + self.opts.many_to_many
        for f in fields:
            if not f.editable or isinstance(f, models.AutoField) \
                    or not f.name in cleaned_data:
                continue
            data[f] = cleaned_data[f.name]

        if n:
            for obj in queryset:
                for f, v in data.items():
                    f.save_form_data(obj, v)
                obj.save()
            self.message_user(_("Successfully change %(count)d %(items)s.") % {
                "count": n, "items": model_ngettext(self.opts, n)
            }, 'success')

def change_models(self, queryset, cleaned_data):
        n = queryset.count()

        data = {}
        for f in self.opts.fields:
            if not f.editable or isinstance(f, models.AutoField) \
                    or not f.name in cleaned_data:
                continue
            value = cleaned_data[f.name]
            if value:
                data[f] = value

        if n:
            for obj in queryset:
                for f, v in data.items():
                    f.save_form_data(obj, v)
                obj.save()
            self.message_user(_("Successfully change %(count)d %(items)s.") % {
                "count": n, "items": model_ngettext(self.opts, n)
            }, 'success')

def change_models(self, queryset, cleaned_data):
        n = queryset.count()

        data = {}
        fields = self.opts.fields + self.opts.many_to_many
        for f in fields:
            if not f.editable or isinstance(f, models.AutoField) \
                    or not f.name in cleaned_data:
                continue
            data[f] = cleaned_data[f.name]

        if n:
            for obj in queryset:
                for f, v in data.items():
                    f.save_form_data(obj, v)
                obj.save()
            self.message_user(_("Successfully change %(count)d %(items)s.") % {
                "count": n, "items": model_ngettext(self.opts, n)
            }, 'success')

def backwards(self, orm):
        # Adding model 'View'
        db.create_table('sentry_view', (
            ('path', self.gf('django.db.models.fields.CharField')(max_length=100, unique=True)),
            ('verbose_name', self.gf('django.db.models.fields.CharField')(max_length=200, null=True)),
            ('id', self.gf('sentry.db.models.fields.bounded.BoundedBigAutoField')(primary_key=True)),
            ('verbose_name_plural', self.gf('django.db.models.fields.CharField')(max_length=200, null=True)),
        ))
        db.send_create_signal('sentry', ['View'])

        # Adding M2M table for field views on 'Group'
        db.create_table('sentry_groupedmessage_views', (
            ('id', models.AutoField(verbose_name='ID', primary_key=True, auto_created=True)),
            ('group', self.gf('sentry.db.models.fields.FlexibleForeignKey')(orm['sentry.group'], null=False)),
            ('view', self.gf('sentry.db.models.fields.FlexibleForeignKey')(orm['sentry.view'], null=False))
        ))
        db.create_unique('sentry_groupedmessage_views', ['group_id', 'view_id'])

def sequence_reset_sql(self, style, model_list):
        from django.db import models
        output = []
        query = self._sequence_reset_sql
        for model in model_list:
            for f in model._meta.local_fields:
                if isinstance(f, models.AutoField):
                    table_name = self.quote_name(model._meta.db_table)
                    sequence_name = self._get_sequence_name(model._meta.db_table)
                    column_name = self.quote_name(f.column)
                    output.append(query % {'sequence': sequence_name,
                                           'table': table_name,
                                           'column': column_name})
                    # Only one AutoField is allowed per model, so don't
                    # continue to loop
                    break
            for f in model._meta.many_to_many:
                if not f.remote_field.through:
                    table_name = self.quote_name(f.m2m_db_table())
                    sequence_name = self._get_sequence_name(f.m2m_db_table())
                    column_name = self.quote_name('id')
                    output.append(query % {'sequence': sequence_name,
                                           'table': table_name,
                                           'column': column_name})
        return output

def sequence_list(self):
        "Returns a list of information about all DB sequences for all models in all apps."
        from django.apps import apps
        from django.db import models, router

        sequence_list = []

        for app_config in apps.get_app_configs():
            for model in router.get_migratable_models(app_config, self.connection.alias):
                if not model._meta.managed:
                    continue
                if model._meta.swapped:
                    continue
                for f in model._meta.local_fields:
                    if isinstance(f, models.AutoField):
                        sequence_list.append({'table': model._meta.db_table, 'column': f.column})
                        break  # Only one AutoField is allowed per model, so don't bother continuing.

                for f in model._meta.local_many_to_many:
                    # If this is an m2m using an intermediate table,
                    # we don't need to reset the sequence.
                    if f.remote_field.through is None:
                        sequence_list.append({'table': f.m2m_db_table(), 'column': None})

        return sequence_list

def forwards(self, orm):
        # Adding model 'Project'
        db.create_table('api_project', (
            ('id', self.gf('django.db.models.fields.AutoField')(primary_key=True)),
            ('name', self.gf('django.db.models.fields.CharField')(max_length=255)),
            ('organization', self.gf('django.db.models.fields.related.ForeignKey')(related_name='project_organization', to=orm['auth.User'])),
            ('created_by', self.gf('django.db.models.fields.related.ForeignKey')(related_name='project_creator', to=orm['auth.User'])),
            ('date_created', self.gf('django.db.models.fields.DateTimeField')(auto_now_add=True, blank=True)),
            ('date_modified', self.gf('django.db.models.fields.DateTimeField')(auto_now=True, blank=True)),
        ))
        db.send_create_signal('api', ['Project'])

        # Adding unique constraint on 'Project', fields ['name', 'organization']
        db.create_unique('api_project', ['name', 'organization_id'])

        # Adding M2M table for field projects on 'Team'
        db.create_table('api_team_projects', (
            ('id', models.AutoField(verbose_name='ID', primary_key=True, auto_created=True)),
            ('team', models.ForeignKey(orm['api.team'], null=False)),
            ('project', models.ForeignKey(orm['api.project'], null=False))
        ))
        db.create_unique('api_team_projects', ['team_id', 'project_id'])

def sequence_reset_sql(self, style, model_list):
        from django.db import models
        output = []
        query = self._sequence_reset_sql
        for model in model_list:
            for f in model._meta.local_fields:
                if isinstance(f, models.AutoField):
                    table_name = self.quote_name(model._meta.db_table)
                    sequence_name = self._get_sequence_name(model._meta.db_table)
                    column_name = self.quote_name(f.column)
                    output.append(query % {'sequence': sequence_name,
                                           'table': table_name,
                                           'column': column_name})
                    # Only one AutoField is allowed per model, so don't
                    # continue to loop
                    break
            for f in model._meta.many_to_many:
                if not f.remote_field.through:
                    table_name = self.quote_name(f.m2m_db_table())
                    sequence_name = self._get_sequence_name(f.m2m_db_table())
                    column_name = self.quote_name('id')
                    output.append(query % {'sequence': sequence_name,
                                           'table': table_name,
                                           'column': column_name})
        return output

def sequence_list(self):
        "Returns a list of information about all DB sequences for all models in all apps."
        from django.apps import apps
        from django.db import models, router

        sequence_list = []

        for app_config in apps.get_app_configs():
            for model in router.get_migratable_models(app_config, self.connection.alias):
                if not model._meta.managed:
                    continue
                if model._meta.swapped:
                    continue
                for f in model._meta.local_fields:
                    if isinstance(f, models.AutoField):
                        sequence_list.append({'table': model._meta.db_table, 'column': f.column})
                        break  # Only one AutoField is allowed per model, so don't bother continuing.

                for f in model._meta.local_many_to_many:
                    # If this is an m2m using an intermediate table,
                    # we don't need to reset the sequence.
                    if f.remote_field.through is None:
                        sequence_list.append({'table': f.m2m_db_table(), 'column': None})

        return sequence_list

def change_models(self, queryset, cleaned_data):
        n = queryset.count()

        data = {}
        fields = self.opts.fields + self.opts.many_to_many
        for f in fields:
            if not f.editable or isinstance(f, models.AutoField) \
                    or not f.name in cleaned_data:
                continue
            data[f] = cleaned_data[f.name]

        if n:
            for obj in queryset:
                for f, v in data.items():
                    f.save_form_data(obj, v)
                obj.save()
            self.message_user(_("Successfully change %(count)d %(items)s.") % {
                "count": n, "items": model_ngettext(self.opts, n)
            }, 'success')

def forwards(self, orm):

        # Adding model 'Tag'
        db.create_table('maasserver_tag', (
            ('id', self.gf('django.db.models.fields.AutoField')(primary_key=True)),
            ('created', self.gf('django.db.models.fields.DateTimeField')()),
            ('updated', self.gf('django.db.models.fields.DateTimeField')()),
            ('name', self.gf('django.db.models.fields.CharField')(unique=True, max_length=256)),
            ('definition', self.gf('django.db.models.fields.TextField')()),
            ('comment', self.gf('django.db.models.fields.TextField')(blank=True)),
        ))
        db.send_create_signal('maasserver', ['Tag'])

        # Adding M2M table for field tags on 'Node'
        db.create_table('maasserver_node_tags', (
            ('id', models.AutoField(verbose_name='ID', primary_key=True, auto_created=True)),
            ('node', models.ForeignKey(orm['maasserver.node'], null=False)),
            ('tag', models.ForeignKey(orm['maasserver.tag'], null=False))
        ))
        db.create_unique('maasserver_node_tags', ['node_id', 'tag_id'])

def forwards(self, orm):
        # Adding field 'StaticIPAddress.subnet'
        db.add_column('maasserver_staticipaddress', 'subnet',
                      self.gf('django.db.models.fields.related.ForeignKey')(to=orm['maasserver.Subnet'], null=True, blank=True),
                      keep_default=False)


        # Changing field 'StaticIPAddress.ip'
        db.alter_column('maasserver_staticipaddress', 'ip', self.gf('maasserver.fields.MAASIPAddressField')(max_length=39, unique=True, null=True))
        # Adding M2M table for field ip_addresses on 'Interface'
        db.create_table('maasserver_interface_ip_addresses', (
            ('id', models.AutoField(verbose_name='ID', primary_key=True, auto_created=True)),
            ('interface', models.ForeignKey(orm['maasserver.interface'], null=False)),
            ('staticipaddress', models.ForeignKey(orm['maasserver.staticipaddress'], null=False))
        ))
        db.create_unique('maasserver_interface_ip_addresses', ['interface_id', 'staticipaddress_id'])

def forwards(self, orm):
        # Adding model 'ActionStatus'
        db.create_table(u'Crm_actionstatus', (
            (u'id', self.gf('django.db.models.fields.AutoField')(primary_key=True)),
            ('name', self.gf('django.db.models.fields.CharField')(max_length=200)),
            ('ordering', self.gf('django.db.models.fields.IntegerField')(default=10)),
        ))
        db.send_create_signal(u'Crm', ['ActionStatus'])

        # Adding field 'Action.status'
        db.add_column(u'Crm_action', 'status',
                      self.gf('django.db.models.fields.related.ForeignKey')(default=None, to=orm['Crm.ActionStatus'], null=True, blank=True),
                      keep_default=False)

        # Adding M2M table for field allowed_status on 'ActionType'
        m2m_table_name = db.shorten_name(u'Crm_actiontype_allowed_status')
        db.create_table(m2m_table_name, (
            ('id', models.AutoField(verbose_name='ID', primary_key=True, auto_created=True)),
            ('actiontype', models.ForeignKey(orm[u'Crm.actiontype'], null=False)),
            ('actionstatus', models.ForeignKey(orm[u'Crm.actionstatus'], null=False))
        ))
        db.create_unique(m2m_table_name, ['actiontype_id', 'actionstatus_id'])

def forwards(self, orm):
        # Adding M2M table for field contacts on 'Action'
        m2m_table_name = db.shorten_name(u'Crm_action_contacts')
        db.create_table(m2m_table_name, (
            ('id', models.AutoField(verbose_name='ID', primary_key=True, auto_created=True)),
            ('action', models.ForeignKey(orm[u'Crm.action'], null=False)),
            ('contact', models.ForeignKey(orm[u'Crm.contact'], null=False))
        ))
        db.create_unique(m2m_table_name, ['action_id', 'contact_id'])

        # Adding M2M table for field entities on 'Action'
        m2m_table_name = db.shorten_name(u'Crm_action_entities')
        db.create_table(m2m_table_name, (
            ('id', models.AutoField(verbose_name='ID', primary_key=True, auto_created=True)),
            ('action', models.ForeignKey(orm[u'Crm.action'], null=False)),
            ('entity', models.ForeignKey(orm[u'Crm.entity'], null=False))
        ))
        db.create_unique(m2m_table_name, ['action_id', 'entity_id'])

def forwards(self, orm):

        # Removing M2M table for field to on 'Emailing'
        db.delete_table('Emailing_emailing_to')

        # Adding M2M table for field send_to on 'Emailing'
        db.create_table('Emailing_emailing_send_to', (
            ('id', models.AutoField(verbose_name='ID', primary_key=True, auto_created=True)),
            ('emailing', models.ForeignKey(orm['Emailing.emailing'], null=False)),
            ('contact', models.ForeignKey(orm['Crm.contact'], null=False))
        ))
        db.create_unique('Emailing_emailing_send_to', ['emailing_id', 'contact_id'])

        # Adding M2M table for field sent_to on 'Emailing'
        db.create_table('Emailing_emailing_sent_to', (
            ('id', models.AutoField(verbose_name='ID', primary_key=True, auto_created=True)),
            ('emailing', models.ForeignKey(orm['Emailing.emailing'], null=False)),
            ('contact', models.ForeignKey(orm['Crm.contact'], null=False))
        ))
        db.create_unique('Emailing_emailing_sent_to', ['emailing_id', 'contact_id'])

def forwards(self, orm):
        # Adding model 'CategoryPermission'
        db.create_table('Profile_categorypermission', (
            ('id', self.gf('django.db.models.fields.AutoField')(primary_key=True)),
            ('category', self.gf('django.db.models.fields.related.OneToOneField')(to=orm['coop_cms.ArticleCategory'], unique=True)),
        ))
        db.send_create_signal('Profile', ['CategoryPermission'])

        # Adding M2M table for field can_view_groups on 'CategoryPermission'
        db.create_table('Profile_categorypermission_can_view_groups', (
            ('id', models.AutoField(verbose_name='ID', primary_key=True, auto_created=True)),
            ('categorypermission', models.ForeignKey(orm['Profile.categorypermission'], null=False)),
            ('group', models.ForeignKey(orm['Crm.group'], null=False))
        ))
        db.create_unique('Profile_categorypermission_can_view_groups', ['categorypermission_id', 'group_id'])

        # Adding M2M table for field can_edit_groups on 'CategoryPermission'
        db.create_table('Profile_categorypermission_can_edit_groups', (
            ('id', models.AutoField(verbose_name='ID', primary_key=True, auto_created=True)),
            ('categorypermission', models.ForeignKey(orm['Profile.categorypermission'], null=False)),
            ('group', models.ForeignKey(orm['Crm.group'], null=False))
        ))
        db.create_unique('Profile_categorypermission_can_edit_groups', ['categorypermission_id', 'group_id'])