Initial value for Formset hidden field

Question

I have a problem with the initial value of a hidden field in a modelform deployed in a formset. Just the first form have the initial value in the hidden field and the others are empty.

The modelForm is:

class md_changelogFormModel(forms.ModelForm):
    post_docs = forms.CharField(widget=forms.HiddenInput(),
                                initial="READY_FOR_RUN")
    # Other fields

    class Meta:
        model = md_changelog
        fields = '__all__'

The same model md_changelog is used in a form based in BaseInlineFormSet:

class md_changelogForm(BaseInlineFormSet)

      class Meta:
            model = md_changelog
            fields = '__all__'

And a formset class is created with inlineformset_factory:

md_changelogFormSet = inlineformset_factory(md_orderlog, md_changelog,
                                            form=md_changelogFormModel,
                                            formset=md_changelogForm,
                                            extra=1, max_num=20)

And the formset class is instantiated in a class based view:

def get(self, request, *args, **kwargs):
    """
    Handles GET requests and instantiates blank versions of the form
    and its inline formsets.
    """
    self.object = None
    form_class = self.get_form_class()
    form = self.get_form(form_class)

    md_changelog_form = md_changelogFormSet(initial=[{'post_docs':'READY_FOR_RUN'}])

    return self.render_to_response(
        self.get_context_data(form=form,
                              md_changelog_form=md_changelog_form))

The problem is that when the post function receives the request.POST, only the post_docs hidden field in the first form of the formset data is filled with the initial value, the others no.

How can I initialize the other forms?

Thanks!

score 0 · Answer 1 · answered Oct 01 '15 at 20:44

If you need to provide initial values for all forms in a given form-field please have a look at the docs: https://docs.djangoproject.com/en/1.8/topics/forms/formsets/#using-initial-data-with-a-formset

Hence, in my view in order to initialize all 3 fields with the same initial date you should change your code to:

def get(self, request, *args, **kwargs):
    """
    Handles GET requests and instantiates blank versions of the form
    and its inline formsets.
    """
    self.object = None
    form_class = self.get_form_class()
    form = self.get_form(form_class)

   md_changelog_form = md_changelogFormSet(initial=[
       {'post_docs':'READY_FOR_RUN'},
       {'post_docs':'READY_FOR_RUN'},
       {'post_docs':'READY_FOR_RUN'},
   ])

   return self.render_to_response(self.get_context_data(form=form, md_changelog_form=md_changelog_form))

Hope that helps!

Thanks!, but in the form we add new forms with the jQuery Formset pluguin, in that case we will need to assign the hidden field value with javascript? — Pedro Muñoz, Oct 01 '15 at 20:54
I don't have a possibility to test it but potientially you can change how a new field in a given formset is initialized. Have a look at this question - [http://stackoverflow.com/questions/1500121/django-how-to-set-initial-values-for-a-field-in-an-inline-model-formset](http://stackoverflow.com/questions/1500121/django-how-to-set-initial-values-for-a-field-in-an-inline-model-formset) - this should solve your problem. — user1544500, Oct 01 '15 at 21:18

Initial value for Formset hidden field

1 Answers1