Strange bug with form errors

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Nestor Burma

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Aug 15, 2016, 4:15:37 AM8/15/16
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I have a very strange bug with fom errors. On my development site, my code works fine. But on my production site (apache + mod-wgsi + posgresql), the form errors I defined in is_valid() method of my ModelForm (in a generic CreateView) are not product by the template. Have you already seen such a thing ?
 
Here is my code :
 
 
views.py:
class UserCreate(CreateView):
    model = User
    template_name = 'base/userCreate.html'
    success_url = '/utilisateurs/nouveau/success/{id}'
    form_class = UtilisateurCreateForm
 
forms.py:
class UtilisateurCreateForm(forms.ModelForm):
    class Meta:
        model = User
        fields = ['first_name', 'last_name', 'email']
    def is_valid(self):
        valid =  super().is_valid()
        if email != '' and User.objects.filter(email = email).exists():
            self.add_error('email', 'Il existe déjà un utilisateur avec cet email.')
            valid = False
        return valid
 
userCreate.html:
{% extends "base/base.html" %}
{% block contenu %}
<h3>Nouvel utilisateur :</h3>
<form action="" method="post">{% csrf_token %}
    {{ form.as_p }}
    <input type="submit" value="Enregistrer" />
</form>
{% endblock %}
 
Thank's for your help.
 

M Hashmi

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Aug 15, 2016, 4:59:39 AM8/15/16
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Can you paste the full traceback from production server?

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Nestor Burma

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Aug 15, 2016, 6:11:22 AM8/15/16
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Oh I just have found the trick !
It comes from a django bug in some earlier version of django 1.9. in FormeMixinBase.form_invalid()
 
I had:
    def form_invalid(self, form):
        return self.render_to_response(self.get_context_data())
 
in place of:
    def form_invalid(self, form):
        return self.render_to_response(self.get_context_data(form=form))
 
so parameters wasn't transfered. Probably my pip did'nt install last version, and my production version was not exactly the same as my development one... An upgrade solved the problem.
 
Ouf ! I believed I was going to come crazy !
 
Thank's for your answer.
 
Envoyé: lundi 15 août 2016 à 08:59
De: "M Hashmi" <mhash...@gmail.com>
À: django...@googlegroups.com
Objet: Re: Strange bug with form errors
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M Hashmi

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Aug 15, 2016, 7:31:17 AM8/15/16
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Ok great.

Take care.

On Mon, Aug 15, 2016 at 3:10 AM, Nestor Burma <nest...@caramail.fr> wrote:
Oh I just have found the trick !
It comes from a django bug in some earlier version of django 1.9. in FormeMixinBase.form_invalid()
 
I had:
    def form_invalid(self, form):
        return self.render_to_response(self.get_context_data())
 
in place of:
    def form_invalid(self, form):
        return self.render_to_response(self.get_context_data(form=form))
 
so parameters wasn't transfered. Probably my pip did'nt install last version, and my production version was not exactly the same as my development one... An upgrade solved the problem.
 
Ouf ! I believed I was going to come crazy !
 
Thank's for your answer.
 
Envoyé: lundi 15 août 2016 à 08:59
De: "M Hashmi" <mhash...@gmail.com>
To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscribe@googlegroups.com.

 

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