增加数据库迁移命令和数据库初始化命令，分离schemas

applications/schemas/admin_user.py

@@ -0,0 +1,20 @@
+from applications.extensions import ma
+from marshmallow import fields
+from applications.models import Dept
+
+
+# 用户models的序列化类
+class UserSchema(ma.Schema):
+    id = fields.Integer()
+    username = fields.Str()
+    realname = fields.Str()
+    enable = fields.Integer()
+    create_at = fields.DateTime()
+    update_at = fields.DateTime()
+    dept = fields.Method("get_dept")
+
+    def get_dept(self, obj):
+        if obj.dept_id != None:
+            return Dept.query.filter_by(id=obj.dept_id).first().dept_name
+        else:
+            return None