A good place to start would be to fix the fact that, if the form is not
valid on a post, the view returns None.
Bill
On Wed, Feb 27, 2013 at 4:53 AM, okorie Emmanuel <nickson1...@gmail.com>wrote:
> hi
>
> Am designing a form from django model, i have store some information in
> the database already, each time i enter a correct values am redirected to
> another page,but when ever an empty field is submitted it crash with this
> message " pin matching query does not exist" also when wrong query is
> entered (that is queries not in the database ) the same thing happens that
> is" pin matching query does not exist" . I think validation is the problem
> but i don't know how to go about it. here is my code
>
> *form.py*
>
> from django import forms
> from you.models import Pin
> from django.forms import ModelForm
>
> class PinForm(forms.ModelForm):
>
> class Meta:
> #pin = forms.CharField(max_length=12, widget=forms.PasswordInput())
> model = Pin
> fields = ('serial_no','pin')
> #exclude = ('is_active',)
> widgets = {'pin': forms.PasswordInput(render_value=False),}
> def clean(self):
> from django.core.exceptions import ValidationError
> if self.pin != pin and self.serial_no != serial_no:
> raise ValidationError('pin does not exist')
> if self.pin == pin and self.serial_no and self.is_active ==
> False:
> raise ValidationError('pin has being used')
> if self.pin == "" and self.serial_no == "":
> raise ValidationError('pin and serial no field cannot be
> empty')
>
>
> *model.py*
>
> from django.db import models
> from django.forms import ModelForm
> from django.core.exceptions import ValidationError
>
>
> class Pin(models.Model):
> pin = models.CharField(max_length=12)
> serial_no = models.CharField(max_length=12)
> is_active = models.BooleanField(default=True)
>
> class Meta:
> db_table = 'db_Pin'
> ordering = ['pin']
> def __unicode__(self):
> return self.pin
>
>
> *views.py*
>
> from you.forms import PinForm
> from django.contrib.auth import authenticate, login, REDIRECT_FIELD_NAME
> from django.http import HttpResponseRedirect, HttpResponse
> from django.template import RequestContext
> from django.shortcuts import render_to_response
> from django.conf import settings
> from you.models import Pin
> from django import forms
> from django.core.exceptions import ValidationError
>
>
> def index(request, template_name="index.html"):
> ValidationError=[]
> if request.method == "POST":
> postdata = request.POST.copy()
> form = PinForm(postdata)
> if form.is_valid():
> pin = request.POST.get('pin', '')
> serial_no = request.POST.get('serial_no', '')
> #decline = Pin.objects.get(pin=pin, serial_no=serial_no,
> is_active=False)
> accept = Pin.objects.get(pin=pin, serial_no=serial_no,
> is_active=True)
> if accept is not None and accept.is_active:
> return HttpResponseRedirect('/acceptance/')
>
> else:
> form = PinForm()
> return
> render_to_response('index.html',{'ValidationError':ValidationError,
> 'form':form},context_instance=RequestContext(request) )
>
>
>
>
> def acceptance(request, template_name = "acceptance.html"):
> return render_to_response(template_name, locals(),context_instance =
> RequestContext(request))
>
>
>
> *Template index.html*
>
> {% extends 'base.html'%}
>
> {% block site_wrapper %}
> <h1>Register</h1>
> {% if errors %}
> <ul>
> {% for ValidationError in ValidationError %}
> <li>{{ ValidationError }}</li>
> {% endfor %}
> </ul>
> {% endif %}
>
> <form action="" method="post">{% csrf_token %}
>
> <table >
> {{ form.as_table }}
> <tr>
> <th></th>
> <td>
> <input type="submit" name="submit" value="Register" />
>
> </td>
> <input type="hidden" name="next" value="{{ next }}" />
> </tr>
> </table>
>
> </form>
>
>
> {% endblock %}
>
>
>
> pls how can i validate this model form so that when an empty form is send
> it will display "can't submit empty form to the user", when wrong query is
> entered it will display to the user "pin and serial number does not exist"
> and if the right query is entered and the is_active is false it should tell
> the user "pin used ", this is because i intend to deactivate a pin and
> serial number when a user registers successfully. thanks
>
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