Flask RESTful api put error

Question

I have a Post model as follows -

class Post(db.Model):
    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    likes = db.Column(db.Integer)
    body = db.Column(db.Text)
    user_id = db.Column(db.Integer, db.ForeignKey('user.id'))

    def __init__(self, body, user_id):
        self.likes = 0
        self.body = body
        self.user_id = user_id

I am unable to update objects using the PUT request. Here is my code -

class UserPost(Resource):
    def get(self, post_id):
        print(post_id)
        return marshal(Post.query.get(post_id), post_fields)

    def put(self, post_id):
        post = Post.query.get_or_404(post_id)
        args = post_parser.parse_args()
        print args
        for k, v in args.iteritems():
            if v is not None:
                post.__dict__[k] = v

                db.session.add(post)
                db.session.commit()
        return marshal(post, post_fields)

The Post object is not updated.

Answer 1

Instead of manually updating the post.__dict__ use setattr.