Databases
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PO"Column 'contact_id' cannot be null" with a ForeignKey Field
 

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  1. PO"Column 'contact_id' cannot be null" with a ForeignKey Field
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    <p>I'm looking for a way to get the contact.id to pass to my ForeignKey field. Right now it's returning an error stating the contact_id cannot be null. </p> <p>Here is my Models:</p> <pre><code>class Contact(models.Model): first_name = models.CharField(max_length=100, help_text="First Name") last_name = models.CharField(max_length=100, help_text="Last Name") email_address = models.EmailField(max_length=275) address = models.CharField(max_length=10, choices=ADDRESS_CHOICES) def __unicode__(self): return "%s %s" % (self.first_name, self.last_name) class LetterHead(models.Model): contact = models.ForeignKey(Contact, related_name='letterhead') address = models.CharField(max_length=10, choices=ADDRESS_CHOICES) quantity = models.CharField(max_length=4, choices=QUANTITY_CHOICES) </code></pre> <p>Here are my Views:</p> <pre><code>class ContactForm(forms.ModelForm): address = forms.ChoiceField(required=True, widget=RadioSelect(), choices=ADDRESS_CHOICES,) class Meta: model = Contact class LetterHeadForm(forms.ModelForm): address = forms.ChoiceField(required=False, widget=RadioSelect(), choices=ADDRESS_CHOICES) class Meta: model = LetterHead exclude = ('contact',) widgets = { 'quantity': forms.Select(choices=QUANTITY_CHOICES), } LetterHeadFormSet = modelformset_factory(LetterHead, form=LetterHeadForm, extra=2, max_num=2) </code></pre> <p>Here are my Views:</p> <pre><code>class OrderFormProcessor(object): def __init__(self, contact=None, contact_form_class=ContactForm, letterhead_form_class=LetterHeadFormSet, send_notification=False): self.contact_form_class = contact_form_class self.letterhead_form_class = letterhead_form_class self.send_notification = send_notification self.contact = contact def process(self, request, context=None): if not context: context = {} data = request.POST or None contact = self.contact contact_form = self.contact_form_class(data, instance=contact) forms = dict( contact_form=contact_form, ) formsets = dict( letterhead_formset=self.letterhead_form_class(data, prefix='letterhead_'), ) if request.method == 'POST': for f in forms.values() + formsets.values(): print f.__class__, f.is_valid() form_is_valid = all([f.is_valid() for f in forms.values() + formsets.values()]) if form_is_valid: contact = forms['contact_form'].save() letterhead_form = formsets['letterhead_formset'] for lf in letterhead_form: lf.contact_id = contact.id lf.save() if self.send_notification: email = OrderFormNotification(to=[settings.NO_REPLY_EMAIL_ADDRESS], extra_context=data) email.send() else: pass all_forms = chain(forms.values(), chain.from_iterable(formsets.values())) context = context.copy() context.update(forms.items() + formsets.items()) context.update( error_list=list(chain.from_iterable([form.errors.values() for form in all_forms])), ) return (forms, formsets), context </code></pre>
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    1. UStjoenz
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