CODEWITHSUNDEEP
djangodjango-views
omushpapa
omushpapa

Reputation: 1732

Identifying if object already exists in CreateView

Is there a way of determining if an object exists in the database. If it does, an "object already exists" is returned. Otherwise, a new object is created.

Upvotes: 1

Views: 1432

Answers (2)

omushpapa
omushpapa

Reputation: 1732

So, the solution I implemented had to go to the ModelForm:

class LabelForm(forms.ModelForm):

    class Meta:
        model = Label
        fields = ('name',)

    def clean(self):
        if Label.objects.filter(name=self.cleaned_data['name'].lower()).exists()
            raise forms.ValidationError('Label exists!')

        return self.cleaned_data

Upvotes: 3

Remi Smirra
Remi Smirra

Reputation: 2539

How about using the get_or_create method? With this, you will also see, whether or not the object has been newly created. If not, you return your "object already exists".

You should probably do this in your override of the post(request, *args, **kwargs) method within your view.

See the docs for futher information

Upvotes: 0

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