In the example shown by the code below, is it possible to automatically validate and create instances of Endereco and Coordenada using LocalizacaoForm?
The reason why I want to do this is so that I can use Generic Views as much as possible, and they don't work well (at least not out-of-the-box) with more than one ModelForm per view.
In the application, I want to render a LocalizacaoForm and show the fields from Endereco and Coordenada as well. What I am doing in so far doesn't seem to solve it, because self.fields.update(fields_for_model(Coordenada)) only creates the input fields, not an actual instance of Coordenada. Therefore I get a django NOT NULL constraint failed id for the object coordenada.
Is there a way to do what I want or should I just stick with rendering each form separately?
#models.py
class Coordenada(models.Model):
latitude = models.FloatField()
longitude = models.FloatField()
altitude = models.FloatField()
erro_horizontal = models.FloatField()
class Endereco(models.Model):
cep = models.IntegerField()
uf = models.CharField(max_length=2)
localidade = models.CharField(max_length=50) # nome da cidade
# other fields...
class Localizacao(models.Model):
endereco = models.OneToOneField(Endereco)
coordenada_geografica = models.ForeignKey('Coordenada')
#forms.py
class LocalizacaoForm(forms.ModelForm):
def __init__(self, instance=None, *args, **kwargs):
super(LocalizacaoForm, self).__init__(instance=instance, *args, **kwargs)
# Retrieve the fields from Endereco and Coordenada model and update the fields with it
self.fields.update(fields_for_model(Endereco))
self.fields.update(fields_for_model(Coordenada))
class Meta:
model = Localizacao
exclude = ('endereco', 'coordenada_geografica')
#views.py
class LocalizacaoCreateView(generic.CreateView):
model = Localizacao
form_class = LocalizacaoForm
template_name = 'localizacao_create_form.html'
You can create instances of Coordenada and Endereco in the save() method of LocalizacaoForm, like this:
class LocalizacaoForm(forms.ModelForm):
# The rest of the form ...
# ...
def save(self, commit=False):
localizacao = super(LocalizacaoForm, self).save(commit=False)
# create an instance of Coordenada
coordenada = Coordenada.objects.create(
latitude=self.cleaned_data['latitude'],
longitude=self.cleaned_data['longitude'],
altitude=self.cleaned_data['altitude'],
erro_horizontal=self.cleaned_data['erro_horizontal']
)
# create an instance of Endereco
endereco = Endereco.objects.create(
cep=self.cleaned_data['cep'],
uf=self.cleaned_data['uf'],
localidade=self.cleaned_data['localidade'],
)
# add those instances to localizacao
localizacao.coordenada_geografica = coordenada
localizacao.endereco = endereco
if commit:
localizacao.save()
return localizacao
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