Flask WT-Form not getting Validated

Question

My Flask form is not getting validated. Tried everything. form.validate() is not validating, although, there is no validation present. Is there any way out of this situation?

HTML Code

<body>
    <form method="POST" action = "{{ url_for('/generate') }}" novalidate>
        {{ form.csrf_token }}
        {{ form.hidden_tag() }} <br>
        {{ form.IsAssistantComm() }} <br>
        {{ form.Submit() }} <br>
    </form>
</body>

Flask Code

class GeneratorForm(FlaskForm):
    To = StringField('TO')
    IsAssistantComm = BooleanField('Is Assistant Commissioner?')
    Submit = SubmitField('Generate')

@app.route('/generate', methods=['GET', 'POST'])
def generate():
    form = GeneratorForm()
    if form.is_submitted():
        print("submitted")
    if form.validate():
        print("valid")
    if form.validate_on_submit():
        print("I am here")
        IsAssistantComm = form.IsAssistantComm.data
        return redirect('/')
    return render_template('main.html', form=form)

Program Stacktrace:


 * Running on http://127.0.0.1:5090/ (Press CTRL+C to quit)
submitted
127.0.0.1 - - [30/May/2020 18:48:08] "POST /generate HTTP/1.1" 200 -
submitted
127.0.0.1 - - [30/May/2020 18:48:09] "POST /generate HTTP/1.1" 200 -

Could you add the output of print(form.errors), it would help with debugging. — Atte
Also, I don't think you need both {{ form.csrf_token }} and {{ form.hidden_tag() }} in your template file, hidden tag should include the CSRF token. — Atte
Does this answer your question? WTF form.validate_on_submit() not working — rfkortekaas

Akib Rhast Akib Rhast · Accepted Answer · 2020-05-30T14:47:04

I might be mistaken here, but I think it just might be the fact that you have no form validation in your GenerateForm class, do something like this :

class GeneratorForm(FlaskForm):
To = StringField('TO')
IsAssistantComm = BooleanField('Is Assistant Commissioner?', validators =[DataRequired()])
Submit = SubmitField('Generate')

Let me know if that fixes it :D

Flask WT-Form not getting Validated

1 Answers