diff --git a/app/model/PosModel.py b/app/model/PosModel.py
index 973ee88..0446b40 100644
--- a/app/model/PosModel.py
+++ b/app/model/PosModel.py
@@ -1,4 +1,7 @@
-from sqlmodel import Field
+from typing import Optional
+
+from pydantic import computed_field
+from sqlmodel import Field, Relationship
 
 from app.model.BasicModel import BasicModel
 from app.utils.create_module_service import create_model_service
@@ -9,9 +12,33 @@ class PosModel(BasicModel, table=True):
 
   name: str = Field(default=None, description="职位名称")
   code: str = Field(default=None, description="职位编码")
-  parent_code: str = Field(default=None, description="父职位编码")
+  # parent_code: str = Field(default=None, description="父职位编码")
   organization_code: str = Field(default=None, description="所属组织编码")
   remarks: str = Field(default=None, description="备注信息")
 
+  parent_code: str = Field(
+    default=None,
+    description="职位编码",
+    foreign_key="pl_pos.code",  # 添加外键约束
+    nullable=True
+  )
+
+  parent: Optional["PosModel"] = Relationship(
+    sa_relationship_kwargs={
+      "foreign_keys": "PosModel.parent_code",
+      "remote_side": "PosModel.code",
+      "uselist": False
+    }
+  )
+
+  @computed_field
+  @property
+  def parent_name(self) -> Optional[str]:
+    return self.parent.name if self.parent else None
+
+  @parent_name.setter
+  def parent_name(self, value: Optional[str]) -> None:
+    pass
+
 
 PosService = create_model_service(PosModel)