Пишу приложения с использованиям SQLALCHEMY, но во время запуска приложения получаю ошибку
sqlalchemy.exc.ArgumentError: Column expression expected for argument 'foreign_keys'; got 'post.id'.
Был бы очень признателен за помощь в решении проблемы
Полная версия кода:
from flask import Flask, request, flash
from flask_sqlalchemy import SQLAlchemy
from sqlalchemy.testing import db
from wtforms_alchemy import ModelForm
app = Flask(__name__)
app.config.update(
DEBUG=True,
Secret_key='This must been secret !',
SQLACHEMY_DATABESE_URI='sqlite:///app_db.db',
SQLALCHEMY_TRACK_NOTIFICATION=False,
WTF_CSRF_ENABLE=False,
)
db = SQLAlchemy(app)
class Post(db.Model):
id = db.Column(db.Integer, primary_key=True, autoincrement=True, index=True)
post_name = db.Column(db.String(75), nullable=False)
post_body = db.Column(db.String(3000), nullable=False)
def __str__(self):
return '<Post> {}'.format(self.data)
class Comments(db.Model):
id = db.Column(db.Integer, primary_key=True, autoincrement=True, index=True)
post_id = db.Column(
db.Integer,
db.ForeignKey('post.id'),
index=True,
nullable=False,
)
post = db.relationship(Post, foreign_keys=['post_id', ])
post_comment = db.Column(db.String(1500), nullable=False)
def __str__(self):
return '<Comments> {}'.format(self.data)
# Error here !
class PostForm(ModelForm):
class Meta:
model = Post()
@app.route('/')
def index():
return 'Hello from Flask'
@app.route('/add_post', methods=['POST'])
def add_post():
form = PostForm(request.form)
if form.validate():
post_data = Post(**form.data)
db.session.add(post_data)
db.session.commit()
if __name__ == '__main__':
db.create_all()
app.run()
