Data not inserted into database with sqlAlchemy [closed] - flask

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I am new to Flask and webdevelopment.
When I am trying to insert data to an EMPTY database, either the data simply does not insert into database successfully, or an error saying "table check has no column named name" pops up (which is right now quoted, and deleted when I instantiate object "check"). \
app = Flask(__name__)
app.app_context().push()
app.config.from_object(Config)
#not let people to modify the cookies
app.config['SECRET_KEY'] = 'you-will-never-guess'
#database adn migration are instances in python
with app.app_context():
db = SQLAlchemy(app)
db.create_all()
db.session.commit()
db.init_app(app)
......
#app.route('/images/', methods=['GET', 'POST'])
def image():#fetch the building by id
#!!! use requenst, to link the arguments passed in from href, then to the python
id = request.args.get('id', default='', type=str)
form = CheckForm()
if int(id)> 0 and int(id) <= image_len:
if form.validate_on_submit():
check = Check( yes=form.yes.data, maybe_yes = form.maybe_yes.data, no=form.no.data)
db.session.add(check)
db.session.commit()
flash('inserted!')
return redirect(url_for('index'))
return render_template('images.html', images=images, id = id, form = form)
else:
flash("You reach the top", "warning")
return render_template('allImage.html', images=images)
class Check(db.Model):
dbid = db.Column(db.Integer, primary_key=True)
# !!!!! name = db.Column(db.Integer, unique = True)
yes = db.Column(db.Boolean)
maybe_yes = db.Column(db.Boolean)
no = db.Column(db.Boolean)
def __repr__(self):
return f"Check('{self.name}', '{self.yes}', '{self.maybe_yes}','{self.no}')"
if __name__ == "__main__":
u = Check( yes=False, maybe_yes = True, no =None)
db.session.add(u)
db.session.commit()
Here is my code, and please help me to find the bug and shed some light! Thanks a lot!

Answer 1

It seems like you have defined a column "name" in your Check model, but you have commented it out. So when you create an instance of the Check model, you are trying to pass a value to the "name" attribute, which is not defined. Hence the error "table check has no column named name".
To fix this error, you should remove the reference to "name" in the repr method of the Check model:
def __repr__(self):
return f"Check('{self.yes}', '{self.maybe_yes}','{self.no}')"
Also, you can initialize your database by using the following code:
if __name__ == '__main__':
with app.app_context():
db.create_all()
u = Check(yes=False, maybe_yes = True, no =None)
db.session.add(u)
db.session.commit()
This code creates a database and tables only if they don't already exist, and then adds a new instance of Check to the database and commits the changes to the database.