[fix] Pydantic save json error

api/app/base/type.py

@@ -0,0 +1,25 @@
+from pydantic import BaseModel, Field
+from sqlalchemy import TypeDecorator, JSON
+
+
+class PydanticType(TypeDecorator):
+    impl = JSON
+
+    def __init__(self, pydantic_model: type[BaseModel]):
+        super().__init__()
+        self.model = pydantic_model
+
+    def process_bind_param(self, value, dialect):
+        # 入库：Model -> dict
+        if value is None:
+            return None
+        if isinstance(value, self.model):
+            return value.dict()
+        return value   # 已经是 dict 也放行
+
+    def process_result_value(self, value, dialect):
+        # 出库：dict -> Model
+        if value is None:
+            return None
+        # return self.model.parse_obj(value)  # pydantic v1
+        return self.model.model_validate(value)  # pydantic v2