WTForms尝试将我的元组作为SQLAlchemy行对象读取，但抛出错误

from wtforms import Form, StringField
from wtforms.validators import DataRequired
from sqlalchemy import Column, Integer, String
from sqlalchemy.ext.declarative import declarative_base

Base = declarative_base()

class MyModel(Base):
    __tablename__ = 'my_table'
    id = Column(Integer, primary_key=True)
    name = Column(String(255))

class MyForm(Form):
    id = StringField('ID', validators=[DataRequired()])
    name = StringField('Name', validators=[DataRequired()])

def tuple_to_model(tuple_data):
    id, name = tuple_data
    return MyModel(id=id, name=name)

# 在视图函数中使用
form = MyForm()
if form.validate_on_submit():
    tuple_data = (form.id.data, form.name.data)
    my_model = tuple_to_model(tuple_data)
    # 然后进行数据库操作或其他操作