formset has_changed always return true.

[Mei B]

       if request.method == "POST":

            formset = forms.Formset(data=request.POST, initial=initial)

            if not formset.has_changed(): #has_changed always returns true! 

                msg = "No changes detected."

            if formset.has_changed() and formset.is_valid()

                do stuff...

        else:

            formset = forms.Formset(initial=initial)

            formset_get = formset

What am i doing wrong?

[Gil Obradors]

Hi!

Have you instanced first de form?

Maybe this code from djano help you

from django.http import HttpResponseRedirect
from django.shortcuts import render

from .forms import NameForm

def get_name(request):
    # if this is a POST request we need to process the form data
    if request.method == 'POST':
        # create a form instance and populate it with data from the request:
        form = NameForm(request.POST)
        # check whether it's valid:
        if form.is_valid():
            # process the data in form.cleaned_data as required
            # ...
            # redirect to a new URL:
            return HttpResponseRedirect('/thanks/')

    # if a GET (or any other method) we'll create a blank form
    else:
        form = NameForm()

    return render(request, 'name.html', {'form': form})

Maybe you can check has_changed() after  form= Nameofyourforminformspy(request.POST) ?

good luck

https://docs.djangoproject.com/en/2.2/topics/forms/

https://docs.djangoproject.com/en/2.2/topics/forms/formsets/

Missatge de Mei B <lidokaw...@gmail.com> del dia dt., 11 de juny 2019 a les 4:33:

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[Mei B]

Yes I am already instantiated the form and check has_changed after.

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[Gil Obradors]

Can you paste codes?  Forms.py and views.py

El dc., 12 de juny 2019, 1:24, Mei B <lidokaw...@gmail.com> va escriure:

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