python - Multiple models validation in the same View - Django 1.11 -


i'm looking strategy validate uniqueness of keys of 4 models have relationships each other before being able save them in database.

in other words, check uniqueness of keys there no inconsistency in database when using model.save() method, , use when unique keys unique.

following view below example, fields cnpj, address, , number respectively in legalperson, email , phone, must unique.

class storeregistrationview(view):     '''     classe responsavel pelo cadastro de lojas     '''     def post(self, request):          if request.method == 'post':             #import pdb; pdb.set_trace()             form = storeform(request.post)              if form.is_valid():                  lp = legalperson(                     cnpj = form.cleaned_data['cnpj'],                     corporate_name = form.cleaned_data['corporate_name'],                     fantasy_name = form.cleaned_data['fantasy_name'],                     state_inscription = form.cleaned_data['state_inscription'],                     municipal_inscription = form.cleaned_data['municipal_inscription'],                     )                  lp.save()                  address = address(                     street = form.cleaned_data['street'],                     neighborhood = form.cleaned_data['neighborhood'],                     number = form.cleaned_data['number'],                     complement = form.cleaned_data['complement'],                     city = form.cleaned_data['city'],                     estate = form.cleaned_data['estate'],                     country = 'brasil',                     cep = form.cleaned_data['cep'],                     latitude = form.cleaned_data['latitude'],                     longitude = form.cleaned_data['longitude'],                     person = lp,                     )                  address.save()                  email = email(                     address = form.cleaned_data['email'],                     person=lp,                     )                  email.save()                  phone = phone(                     number=form.cleaned_data['phone_number'],                     person=lp,                     )                  phone.save()                  # mensagem de sucesso que será disponibilizada para o usuário                 messages.success(request, 'cadastro de loja efetuado com sucesso.')                  return redirect('importar-produtos')          messages.warning(request, 'erro durante o cadastro.')         context = {             'store_form': storeform(),                 }          return render(request, 'n3oadmin/store-registration.html', context)

i've been researching, , found models in django have validating methods model.full_clean(), model.clean(), , model.validate_unique().

instead of using regular form, should create multiple model forms.

class legalpersonform(forms.modelform):     class meta:         model = legalperson         fields = [...]  class = addressform(forms.modelform):     class meta:         model = legalperson         exclude = ['person']

then, use model forms in view , template. model forms take care of validating unique constraints.

if request.method == 'post':     address_form = addressform(request.post)     legal_person_form = legalpersonform(request.post)      if address_form.is_valid() , legal_person_form.is_valid():         person = legal_person_form.save()         address = address_form.save(commit=false)         address.person = person         address.save()          ...          return redirect('importar-produtos') else:     address_form = addressform()     legal_person_form = legalpersonform()  context = {     'address_form': address_form,     'legal_person_form': legal_person_form, } return render(request, 'n3oadmin/store-registration.html', context)

note can exclude foreign key fields in model form. then, in view, can save commit=false, set foreign key, save instance.

note have instantiated blank forms addressform() , legalpersonform in else block (for requests). means if form valid, see form errors in template instead of blank form.


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