Method database_forwards

django/db/migrations/operations/models.py:97–111

(self, app_label, schema_editor, from_state, to_state)

        )

    def database_forwards(self, app_label, schema_editor, from_state, to_state):
        model = to_state.apps.get_model(app_label, self.name)
        if self.allow_migrate_model(schema_editor.connection.alias, model):
            schema_editor.create_model(model)
            # While the `index_together` option has been deprecated some
            # historical migrations might still have references to them.
            # This can be moved to the schema editor once it's adapted to
            # from model states instead of rendered models (#29898).
            to_model_state = to_state.models[app_label, self.name_lower]
            if index_together := to_model_state.options.get("index_together"):
                schema_editor.alter_index_together(
                    model,
                    set(),
                    index_together,
                )

    def database_backwards(self, app_label, schema_editor, from_state, to_state):
        model = from_state.apps.get_model(app_label, self.name)