Flask, SQLAlchemy: How to make column autoincrement - sqlite

Question

I'm defining a model like this:
class User(UserMixin, db.Model):
__tablename__ = 'users'
id = db.Column(db.Integer, primary_key=True)
first = db.Column(db.String(64))
last = db.Column(db.String(64))
dob = db.Column(db.Date)
street_addr1 = db.Column(db.String(64))
street_addr2 = db.Column(db.String(64))
city = db.Column(db.String(64))
state = db.Column(db.String(2))
zip = db.Column(db.String(9))
gender = db.Column(db.Enum('M', 'F'))
home_box = db.Column(db.String(32))
username = db.Column(db.String(64), unique=True, index=True)
password_hash = db.Column(db.String(128))
#property
def password(self):
raise AttributeError('password is not a readable attribute')
#password.setter
def password(self, password):
self.password_hash = generate_password_hash(password)
def verify_password(self, password):
return check_password_hash(self.password_hash, password)
def __repr__(self):
return '<User %r>' % self.username
#login_manager.user_loader
def load_user(user_id):
return User.query.get(int(user_id))
views.py:
#main.route('/', methods=['GET', 'POST'])
def index():
form = RegistrationForm()
if form.validate_on_submit():
user = User()
user.username = form.username.data
user.first = form.first_name.data
user.last = form.last_name.data
user.city = form.city.data
user.dob = form.dob.data
user.gender = form.gender.data
user.home_box = form.home_box.data
user.state = form.state.data
user.street_addr1 = form.street_addr1.data
user.street_addr2 = form.street_addr2.data
user.zip = form.zip.data
user.password = form.password.data
db.session.add(user)
db.session.commit
Right now, inserts are failing because the id is not set:
sqlalchemy.exc.IntegrityError: (IntegrityError) constraint failed 'INSERT INTO users (first, last, dob, street_addr1, street_addr2, city, state, zip, gender, home_box, username, password_hash) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)' ('Nate', 'Reed', '1980-11-11', '', '', '', '', '', 'male', '', 'natereed', 'pbkdf2:sha1:1000$N8JHXEDU$24a7724ae9edda81a73e6b92d23aa576ad8284aa')
How do I make id autoincrement? My understanding is it has to be done at the table (not column) level. How do I do this in the code above?

Answer 1

I figured out the problem was I was trying to insert a value for gender that is not valid. It's an enum with values 'M' or 'F'.
It would be nice if the form could just be generated from the model, as that would eliminate the potential for this error. Any pointers on doing that with Flask?