django - form has no errors but form.is_valid() doesn't validate

Question

I have a form that for some reason it it doesn't throw any errors (if user adds data in the text field) but form.is_valid() doesn't validate. Any ideas?

forms.py:

class MyForm(forms.Form):
    title = forms.CharField(widget=forms.TextInput(attrs={'class':'titleField'))

mytemplate.html

  <form action="" method="post" name="form">{% csrf_token %}
  {{ form.title.errors }}
  {{ form.title }}
  <input type="submit" name='submit_button' value="Post" />
  </form>

views.py:

      if 'submit_button' in request.POST:
            form = MyForm(request.POST)
            if form.is_valid():
               cd = form.cleaned_data 
               title = cd['title']
               g = MyData(title='title')   
               g.save()

       else:
            form = MyForm()

Thierry Lam · Accepted Answer · 2011-04-01 17:01:36Z

60

From your template, add the following:

{{ form.errors }}
{{ form.non_field_errors }}

Do you see any errors from the above?

answered Apr 1, 2011 at 17:01

Thierry Lam

46.5k43 gold badges122 silver badges146 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

Ani Varghese Over a year ago

{{ form.errors }} {{ form.non_field_errors }} doesn't shown any errors for me :( but still its not updating . form is a bound one , instance also passed to the form

Paul Kenjora Over a year ago

If the two above don't work, then you are not passing the GET or POST parameter to the form, hence its not getting any data and not validating. Be sure the form you are calling was passed a GET or POST from request.

user2916527 Over a year ago

I had the same problem and in the end I tracked it down to a boolean field that I had mistakenly set to forms.ChoicesField not forms.BoooleanField in forms.py. So make sure all your field types are correct because for me the error was silent.

mukesh.kumar Over a year ago

when I was subclassing an AuthenticationForm, I was trying to override some widget attributes, but in the constructor, while doing super().__init__(self, *args, **kwargs) I forgot to pass self and hence I was not able to see any errors. After fixing this I was able to see the errors. so pls check your forms.py file for any silly mistakes

enigma · Accepted Answer · 2019-04-02 18:42:04Z

17

You can also print (or log) error at back end too, Similarly use this:

Like, to print error:

print(form.errors)

answered Apr 2, 2019 at 18:42

enigma

1,14110 silver badges11 bronze badges

1 Comment

User Over a year ago

Not always possible when you have Sentry or similar installed

Rami Alloush · Accepted Answer · 2020-12-21 23:09:50Z

1

I'm using this block with bootstrap

{% if form.errors %}
<div class="alert alert-danger" role="alert">
    {% for field, errors in form.errors.items %}
    {% for error in errors %}
    <b>{{ field }}</b>: {{ error }}
    {% endfor %}
    {% endfor %}
</div>
{% endif %}

answered Dec 21, 2020 at 23:09

Rami Alloush

2,6462 gold badges32 silver badges34 bronze badges

Collectives™ on Stack Overflow

django - form has no errors but form.is_valid() doesn't validate

3 Answers 3

4 Comments

1 Comment

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

4 Comments

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related