sqlalchemy.exc.InvalidRequestError when add a filter and apply

[e271828182]

model.py
`
from flask_sqlalchemy import SQLAlchemy
from sqlalchemy import Column, String

db = SQLAlchemy()

class User(db.Model):
tablename = 'ding_user'

id = Column(String(50), primary_key=True, nullable=False)
user_code = Column(String(10), nullable=False)
phone = Column(String(20), nullable=False)
name = Column(String(20), nullable=False)

view.py
from flask_admin.contrib.sqla import ModelView
from flask_admin.contrib.sqla.filters import FilterEqual

from model import User

class UserModelView(ModelView):
column_list = ('phone', 'name')
column_filters = (FilterEqual(column=User.phone, name='Phone'),)`