本地回退了操作

gvsdsdk/model_base.py

@@ -294,6 +294,62 @@ class _CastJsonExpression:
         return f'CastJsonExpr({self.field_name}[{self.key!r}]->{type_name})'
 
 
+class ForeignKeyIdDescriptor:
+    """FK 字段描述符：类级别访问返回 FieldExpression，实例级别访问/设置委托给原始 Django 字段。"""
+    def __init__(self, fk_name):
+        self.fk_name = fk_name
+        self.id_attr = fk_name + '_id'
+        self._original_field = None  # 延迟绑定原始 Django 字段
+
+    def _get_original_field(self, owner):
+        if self._original_field is None:
+            try:
+                self._original_field = owner._meta.get_field(self.fk_name)
+            except Exception:
+                pass
+        return self._original_field
+
+    def __get__(self, obj, objtype=None):
+        if obj is None:
+            return FieldExpression(objtype, self.id_attr)
+        return getattr(obj, self.id_attr)
+
+    def __set__(self, obj, value):
+        # 直接写入实例 __dict__，避免触发描述符递归
+        obj.__dict__[self.id_attr] = value
+
+
+class FieldExpressionDescriptor:
+    """普通字段描述符：类级别访问返回 FieldExpression，实例级别访问/设置委托给原始 Django 字段。"""
+    def __init__(self, field_name):
+        self.field_name = field_name
+        self._original_field = None  # 延迟绑定原始 Django 字段
+
+    def _get_original_field(self, owner):
+        if self._original_field is None:
+            try:
+                self._original_field = owner._meta.get_field(self.field_name)
+            except Exception:
+                pass
+        return self._original_field
+
+    def __get__(self, obj, objtype=None):
+        if obj is None:
+            return FieldExpression(objtype, self.field_name)
+        # 实例级别：从 __dict__ 获取，或让 Django 字段描述符处理
+        if self.field_name in obj.__dict__:
+            return obj.__dict__[self.field_name]
+        # 委托给原始 Django 字段
+        orig = self._get_original_field(objtype)
+        if orig is not None:
+            return orig.__get__(obj, objtype)
+        return getattr(obj, self.field_name)
+
+    def __set__(self, obj, value):
+        # 直接写入实例 __dict__，避免触发描述符递归
+        obj.__dict__[self.field_name] = value
+
+
 class QModelBase(models.base.ModelBase):
     def __new__(mcs, name, bases, namespace, **kwargs):
         # 不再强制设置 db_column —— Django 会自动处理