How to update if user exist instead of create?

[Django Lover]

How i can update model when Key exist else create a new one??

 

My code is-

 

**Form.py**

class UserSettingForm(forms.ModelForm):

     class Meta:

           model = StUserSetting

           fields = ( 'default_language', 'prim_currency', 'number_format', 'decimal_format',

            'date_format', 'time_format', 'currency_format', 'currency_position', 'financial_year_start',

             'week_start', 'estimate_default_tab', 'invoice_default_tab',)

**View.py**

class CreateUpadateUserSetting(LoginRequiredMixin, FormView):

     template_name = 'settings/user_settings.html'

     form_class = UserSettingForm

     success_url = '/user/setting/preference/'

[Larry Martell]

https://docs.djangoproject.com/en/2.1/ref/models/querysets/#update-or-create

[Django Lover]

Thanks, Larry for replying. I want to say I am new in Django and I don't know how to use in class-based view, Can you help me to integrate with CBV?

[Mateusz]

Just for the record, you should probably consider using CreateView and UpdateView (docs) if possible. ;)
Here is an example (Stack).