Flask-WTF validate_on_submit() not executed

Question

I am unable to figure out why my form will not validate. I have made sure that the CSRF field is inserted in to the HTML with form.hidden_tag

Here is the code for my registration form:

from flask_wtf import FlaskForm
from wtforms import StringField, PasswordField, SubmitField, BooleanField
from wtforms.validators import DataRequired, Length, Email, EqualTo


class RegistrationForm(FlaskForm):
    username = StringField('Username', validators=[DataRequired(), Length(min=2, max=20)])
    email = StringField('Email', validators=[DataRequired(), Email()])
    password = PasswordField('Password', validators=[DataRequired()])
    confirm_password = PasswordField('Confirm Password', validators=[DataRequired(), EqualTo(password)])
    submit = SubmitField('Register')

Here is the function in which I am checking to see if the form is validated. It does submit, as the program prints out 'submitted' into my terminal

@app.route('/register', methods=['GET', 'POST'])
def register():
    form = RegistrationForm()
    if form.is_submitted():
        print("submitted")
    if form.validate_on_submit():
        flash(f'Account created for {form.username.data}!', 'success')
        return redirect(url_for('home'))
    print(forms.errors)
    return render_template('register.html', title='Register', form=form)

Using forms.errors, I get the following error message:

{'confirm_password': ["Invalid field name '<UnboundField(PasswordField, ('Password',), {'validators': [<wtforms.validators.DataRequired object at 0x00000205913D2F28>]})>'."]}

I am unsure of what this means.

If it helps, I have all my current code located on GitHub: https://github.com/tomajohnson21/FakeBook

Fredrik · Accepted Answer · 2019-10-19 19:43:08Z

9

You are using the class member password instead of the "fieldname", thus you get the error.

Incorrect:

EqualTo(password)

Correct:

EqualTo('password')

There is an example of EqualTo in WTForms validators documentation

answered Oct 19, 2019 at 19:43

Fredrik

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Coder's hub · Accepted Answer · 2019-01-13 15:07:31Z

1

You can only put single quotes to password to solve it.

confirm_password = PasswordField('Confirm Password', validators=[DataRequired(), EqualTo('password')])

answered Jan 13, 2019 at 15:07

Coder's hub

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