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POContextual form validation in Django
 

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  1. POContextual form validation in Django
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    <p>I want to do "contextal" form validation in django. Consider this case:</p> <pre><code>PLACE_TYPES = ( ('RESTAURANT', 'Restaurant'), ('BARCLUB', 'Bar / Club'), ('SHOPPING', 'Shopping'), ) RESTAURANT_FORMAT_CHOICES = ( ('FAST_FOOD', 'Fast Food'), ('FAST_CASUAL', 'Fast Casual'), ('CASUAL', 'Casual'), ('CHEF_DRIVEN', 'Chef Driven'), ) class Place(models.Model): place_type = models.CharField(max_length=48, choices=PLACE_TYPES, blank=False, null=False) name = models.CharField(max_length=256) website_1 = models.URLField(max_length=512, blank=True) hours = models.CharField(max_length=1024, blank=True) geometry = models.PointField(srid=4326, blank=True, null=True) #Restaurant Specific restaurant_format = models.CharField(max_length=128, choices=RESTAURANT_FORMAT_CHOICES, blank=True, null=True) </code></pre> <p>So in the django admin, the corresponding form for Place will have pulldown menu with choices like "restaurant, bar, club", and there is another field called "restaurant_format".</p> <p>Validation should make sure restaurant_field cannot be null if the first pulldown was set as "restaurant".</p> <p>I am trying something like this:</p> <pre><code>class PlaceAdminForm(forms.ModelForm): def clean(self): if self.cleaned_data['place_type'] == 'RESTAURANT': if self.cleaned_data['place_type'] is None: raise forms.ValidationError('For a restaurant you must choose a restaurant format') </code></pre> <p>but get this error:</p> <p>Exception Type: KeyError Exception Value:<br> place_type</p> <p>Exception Location: /place/admin.py in clean, line 27</p>
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