我们从Python开源项目中，提取了以下35个代码示例，用于说明如何使用django.db.router.allow_migrate()。
def get_queryset(model, using, primary_keys, use_base_manager): # get all objects if not model._meta.proxy and router.allow_migrate(using, model): if use_base_manager: objects = model._base_manager else: objects = model._default_manager queryset = objects.using(using).order_by(model._meta.pk.name) if primary_keys: queryset = queryset.filter(pk__in=primary_keys) return queryset if use_base_manager: objects = model._base_manager else: objects = model._default_manager queryset = objects.using(using).order_by(model._meta.pk.name) if primary_keys: queryset = queryset.filter(pk__in=primary_keys) return queryset
def database_forwards(self, app_label, schema_editor, from_state, to_state): if router.allow_migrate(schema_editor.connection.alias, app_label, **self.hints): self._run_sql(schema_editor, self.sql)
def database_backwards(self, app_label, schema_editor, from_state, to_state): if self.reverse_sql is None: raise NotImplementedError("You cannot reverse this operation") if router.allow_migrate(schema_editor.connection.alias, app_label, **self.hints): self._run_sql(schema_editor, self.reverse_sql)
def database_forwards(self, app_label, schema_editor, from_state, to_state): if router.allow_migrate(schema_editor.connection.alias, app_label, **self.hints): # We now execute the Python code in a context that contains a 'models' # object, representing the versioned models as an app registry. # We could try to override the global cache, but then people will still # use direct imports, so we go with a documentation approach instead. self.code(from_state.apps, schema_editor)
def database_backwards(self, app_label, schema_editor, from_state, to_state): if self.reverse_code is None: raise NotImplementedError("You cannot reverse this operation") if router.allow_migrate(schema_editor.connection.alias, app_label, **self.hints): self.reverse_code(from_state.apps, schema_editor)
def _check_backend_specific_checks(self, **kwargs): app_label = self.model._meta.app_label for db in connections: if router.allow_migrate(db, app_label, model=self.model): return connections[db].validation.check_field(self, **kwargs) return []
def _check_backend_specific_checks(self, **kwargs): app_label = self.model._meta.app_label for db in connections: if router.allow_migrate(db, app_label, model_name=self.model._meta.model_name): return connections[db].validation.check_field(self, **kwargs) return []
def database_forwards(self, app_label, schema_editor, from_state, to_state): # RunPython has access to all models. Ensure that all models are # reloaded in case any are delayed. from_state.clear_delayed_apps_cache() if router.allow_migrate(schema_editor.connection.alias, app_label, **self.hints): # We now execute the Python code in a context that contains a 'models' # object, representing the versioned models as an app registry. # We could try to override the global cache, but then people will still # use direct imports, so we go with a documentation approach instead. self.code(from_state.apps, schema_editor)
