diff --git a/nonebot_plugin_tetris_stats/db/models.py b/nonebot_plugin_tetris_stats/db/models.py
index 068b983..cfda37a 100644
--- a/nonebot_plugin_tetris_stats/db/models.py
+++ b/nonebot_plugin_tetris_stats/db/models.py
@@ -23,9 +23,8 @@ class PydanticType(TypeDecorator):
         *args: Any,
         **kwargs: Any,
     ):
-        for i in get_model:
-            models.update(i())
-        self.models = models
+        self.get_model = get_model
+        self._models = models
         super().__init__(*args, **kwargs)
 
     if PYDANTIC_V2:
@@ -56,6 +55,14 @@ class PydanticType(TypeDecorator):
                     ...
         raise ValueError
 
+    @property
+    def models(self) -> tuple[type[BaseModel], ...]:
+        models: set[type[BaseModel]] = set()
+        for i in self.get_model:
+            models.update(i())
+        models.update(self._models)
+        return tuple(models)
+
 
 class Bind(MappedAsDataclass, Model):
     id: Mapped[int] = mapped_column(init=False, primary_key=True)