Django ModelForm: how do I stuff in an initial value after it is constructed

Question

The question of how to supply an initial value in a ModelForm is well answered: Overriding initial value in ModelForm

But how do I stuff a value in after the model is created? Or how would I correct this code?

class Entry_form(forms.ModelForm):
    class Meta:
        model = models.Entry
        exclude = ('')

:

def entry_add(request, pk):
    form = Entry_form
    selected_text = request.GET.get('selected_text', '')
    form.fields['title'].initial = 'Test: ' + selected_text
    return render(request, 'entry_add,{'form': form})

Answer 1

You have some errors in your code.

1. Remove the line:

   exclude = ('')

   ('') is an empty string, not an empty tuple.

2. form = Entry_form should be form = Entry_form()

3. return render(request, 'entry_add,{'form': form}) - missing closing quote.

The line:

form.fields['title'].initial = 'Test: ' + selected_text

Is correct, and should work.

An alternative way is:

form.initial['title'] = 'Test: ' + selected_text