CODEWITHSUNDEEP
djangoformsdjango-formsdjango-views
Hari
Hari

Reputation: 1623

Django set Initial data in Forms

I am new to Django, Let say I have a view like follow with form

class DepartmentCreateView(LoginRequiredMixin,CreateView):
    form_class = DepartmentForm
    template_name = os.path.join(TEMPLATE_FOLDER, "create/index.html")

    def get_success_url(self):
        position_id = self.kwargs.get('position_id')
        return reverse_lazy('departments_list', kwargs = { 'college_id' : 
        college_id })


    def get_initial(self):
        initial = super(DepartmentCreateView, self).get_initial()
        initial.update({ 'college' : self.kwargs.get('college_id'), 
        'code' : 1 })
         return initial

my form looks like

class DepartmentForm(forms.ModelForm):
    class Meta:
        model = Department
        fields = ('name', 'college', 'code')

when I display form I am setting some default values to some fields(college) using get_initial(), it works as expected, but when I submit the form if the form is invalid(for example code is required but value is null) it shows error message as expected in the code field, but form fails to set default value to college again.

what mistake i made here?

Upvotes: 2

Views: 5842

Answers (3)

antipups
antipups

Reputation: 311

Django have a method get_initial_for_field for form, and in your case correct write that:

def get_initial_for_field(self, field, field_name):
    """
       field_name: string = name of field in your model (college, code, name)
       field = class of this field
       return: value to initial, string, int or other (example: datetime.date.today())
    """

    if field_name == 'college':
        return self.kwargs.get('college_id')

    elif field_name == 'code':
        return '1'

Upvotes: 0

mohammedgqudah
mohammedgqudah

Reputation: 568

you can override the get_form to set the value of the input to your initial value

def get_form(self, form_class=None):
    form = super(CreatePost, self).get_form(form_class)
    form.fields['your_input'].widget.attrs.update({'value': 'new_value'})
    return form

Upvotes: 2

Bill F
Bill F

Reputation: 731

You can use the initial= your_value for each field as found in Django Docs. This should be in your forms.

OR

You can populate it key value pair like initial= {'your_key', your_value} when you init your form.

Upvotes: 2

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