models.py 文件源码

def _from_tables(self):
        if hasattr(self._view_meta, "from_tables"):
            return self._view_meta.from_tables

        from django.apps import apps
        from_models = self._view_meta.from_models
        from_tables = set()
        for label in from_models:
            if "." in label:
                app_label, model_name = label.split(".")
                model = apps.get_model(app_label=app_label, model_name=model_name)
                if issubclass(model, View):
                    from_tables = from_tables | model._from_tables()
                else:
                    from_tables.add(model._meta.db_table)
            else:
                from_tables.add(label)
        setattr(self._view_meta, "from_tables", from_tables)
        return from_tables