1

我正在尝试使用棉花糖的 .load() 方法来反序列化 POST 请求上的 json 对象。但是我一直遇到这个错误'dict' object has no attribute '_sa_instance_state'用户和角色有多对多的关系。模式上的 .dump() 工作正常，但 .load() 可以保存除多个角色之外的所有其他字段。我试图在我的 json 正文中传递它。

{
    "last_name": "Fin",
    "roles": [{"id": 3, "role": "admin"}],
    "email": "test3@test.com",
    "first_name": "Al",
    "access_id": "ec1235",
    "password": "1234567"
}

我的用户和角色模型

user_role = db.Table('user_role',
                 db.Column('user_id', db.ForeignKey('user.id')),
                 db.Column('role_id', db.ForeignKey('role.id')),
                 db.Column('properties', JSONType),
                 )

class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    first_name = db.Column(db.String(80), nullable=False)
    last_name = db.Column(db.String(80), nullable=False)
    access_id = db.Column(db.String(6), unique=True, nullable=False)
    email = db.Column(EmailType, unique=True, nullable=False)
    password = db.Column(db.String(80), nullable=False)
    roles = db.relationship('Role', secondary=user_role, backref='user', cascade="all")

class Role(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    role = db.Column(db.String(20), nullable=False)

我的架构

class RoleSchema(ma.SQLAlchemyAutoSchema):
    class Meta:
        fields = ("id", "role")
        model = Role

class UserSchema(ma.SQLAlchemyAutoSchema):
    roles = ma.Nested(RoleSchema, many=True)

    class Meta:
        load_instance = True
        fields = ("id", "first_name", "last_name", "access_id", "email", "roles, "password")
        model = User

发布请求

    def post(self):
        try:
            body = request.get_json()
            user = user_schema.load(body)
            user.hash_password()
            db.session.add(user)
            db.session.commit()
            return {'id': str(user.id)}, 200
        except Exception as e:
            raise Exception("")
4

0 回答 0