diff --git a/api/app/lib/index.js b/api/app/lib/index.js
index b1991d8b..d7df097b 100644
--- a/api/app/lib/index.js
+++ b/api/app/lib/index.js
@@ -27,7 +27,7 @@ module.exports.models = function (dc) { // dc = { orm: Sequelize对象, ORM: Seq
     });
 
     const { User, Department } = dc.models;
-
+    // 定义外键
     User.belongsTo(Department, { foreignKey: 'departmentId', targetKey: 'id' });
     Department.hasMany(User, { foreignKey: 'departmentId', sourceKey: 'id' });
 };