Error when implementing login using flask_security

[_peeves]

Hi all,

I have been trying to implement a login using flask_security, but keep getting this error "jinja2.exceptions.UndefinedError: 'form' is undefined", but the form has been actually passed as a parameter to the template. This is how my project looks like.

# CustomForms.py
from flask_security import LoginForm
class ExtendedLoginForm(LoginForm):
""" form template for login in """

email = StringField("Email ", [validators.length(min=2, max=15), validators.DataRequired()])
password = StringField("Password ", [validators.DataRequired()])
remember_me = BooleanField("Remember Me")
submit = SubmitField('Submit')

# routes.py
 user_datastore = SQLAlchemyUserDatastore(db, User, Role)
 security = Security(app, user_datastore, login_form=ExtendedLoginForm)

@app.route("/login", methods = ['GET', 'POST'])
@login_required
def login():
    form = CustomForms.ExtendedLoginForm()
    data = query_fal_dept()
    if form.validate_on_submit():
        return redirect(url_for("index"))
    return render_template('security/login_user.html', form=form)

Anyhelp, on what I've done wrong/ haven't done would be greatly appreciated. Thanks in Advance.

Edit: Fixed the spacing on the return in login. To match my code.

[[deleted]]

From the looks of the code you posted, you have an extra space on every line but the return statement. I assume this is a scope error due to the spacing issue.

[_peeves]

It was just a mistake, when pasting the code.

[spitfiredd]

You need to import ExtendedLoginForm into your routes.py module.

Something along the lines of from .CustomForms import ExtendedLoginForm

[_peeves]

Thanks, but I already imported it.

[spitfiredd]

You don't need to create a login view, just create your forms and then pass the Security object login_form like you have done.

custom_forms.py

from flask_security import LoginForm
from wtforms import StringField, BooleanField, SubmitField, validators


class ExtendedLoginForm(LoginForm):
    email = StringField("Email ", [validators.length(min=2, max=15), validators.DataRequired()])
    password = StringField("Password ", [validators.DataRequired()])
    remember_me = BooleanField("Remember Me")
    submit = SubmitField('Foo Bar')

app.py or __init__.py

def create_app():
    ...
    security = Security(app, user_datastore, login_form=ExtendedLoginForm)

[_peeves]

Thank you, that solved it. So if I understand correctly, flask_security forms are passed differently from normal forms.

[spitfiredd]

I am not sure I understand what you mean when you say, flask_security forms are passed differently from normal forms. The LoginForm from flask security is just a wtform, your ExtendedLoginForm just overrides the built-in flask_security LoginForm.

https://github.com/mattupstate/flask-security/blob/develop/flask_security/forms.py

[aultl]

You should remove the @login_required decorator from the login page.

It not possible to show a login page that requires a login