# Formset validation **URL:** \ **Category:** Using Django\ **Created:** [August 1, 2020, 10:32am UTC](https://forum.djangoproject.com/t/formset-validation/3703 "2020-08-01T10:32:02Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![afekhaijoseph](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.djangoproject.com/afekhaijoseph/32/1709_2.png) [@afekhaijoseph](https://forum.djangoproject.com/u/afekhaijoseph)\ **Post date:** [August 1, 2020, 10:32am UTC](https://forum.djangoproject.com/t/formset-validation/3703/1 "2020-08-01T10:32:02Z")
Formsets have been driving me crazy for weeks because the documentation isn’t really helpful using them i keep getting a validation error every time i want to save a formset and i think i have everything in place. Here is the traceback ``` Traceback (most recent call last): File "/home/jojoe/.local/lib/python3.8/site-packages/django/core/handlers/exception.py", line 34, in inner response = get_response(request) File "/home/jojoe/.local/lib/python3.8/site-packages/django/core/handlers/base.py", line 115, in _get_response response = self.process_exception_by_middleware(e, request) File "/home/jojoe/.local/lib/python3.8/site-packages/django/core/handlers/base.py", line 113, in _get_response response = wrapped_callback(request, *callback_args, **callback_kwargs) File "/home/jojoe/.local/lib/python3.8/site-packages/django/contrib/auth/decorators.py", line 21, in _wrapped_view return view_func(request, *args, **kwargs) File "/home/jojoe/portfolio_app/portfolioapp/portfolio/views.py", line 63, in portfolio_form if skillset.is_valid(): File "/home/jojoe/.local/lib/python3.8/site-packages/django/forms/formsets.py", line 308, in is_valid self.errors File "/home/jojoe/.local/lib/python3.8/site-packages/django/forms/formsets.py", line 288, in errors self.full_clean() File "/home/jojoe/.local/lib/python3.8/site-packages/django/forms/formsets.py", line 329, in full_clean for i in range(0, self.total_form_count()): File "/home/jojoe/.local/lib/python3.8/site-packages/django/forms/formsets.py", line 112, in total_form_count return min(self.management_form.cleaned_data[TOTAL_FORM_COUNT], self.absolute_max) File "/home/jojoe/.local/lib/python3.8/site-packages/django/utils/functional.py", line 48, in __get__ res = instance. __dict__ [self.name] = self.func(instance) File "/home/jojoe/.local/lib/python3.8/site-packages/django/forms/formsets.py", line 92, in management_form raise ValidationError( django.core.exceptions.ValidationError: ['ManagementForm data is missing or has been tampered with'] ``` **views** ``` if request.method == 'POST': print(request.POST) person_form = PersonForm(request.POST, request.FILES) occupation_form = OccupationForm(request.POST) contact_form = ContactForm(request.POST) skillset = SkillsFormSet(request.POST, prefix='skills') workexpset = WorkExpFormSet(request.POST, prefix='work-exp') acadexpset = AcadExpFormSet(request.POST, prefix='acad-exp') # if person_form.is_valid() and occupation_form.is_valid() and skillset.is_valid() and workexpset.is_valid() and acadexpset.is_valid() and contact_form.is_valid(): if person_form.is_valid(): person=person_form.save(commit=False) person.user=request.user person.save() if occupation_form.is_valid(): occupation=occupation_form.save(commit=False) occupation.user=request.user occupation.save() if contact_form.is_valid(): contact=contact_form.save(commit=False) contact.user=request.user contact.save() if skillset.is_valid(): instances = skillset.save(commit=false) for instance in instances: instance.user=request.user instance.save() if workexpset.is_valid(): instances = workexpset.save(commit=false) for instance in instances: instance.user=request.user instance.save() if acadexpset.is_valid(): instances = acadexpset.save(commit=false) for instance in instances: instance.user=request.user instance.save() ``` **template** ```
{{skillset.management_form }} {{skillset.non_form_errors}}
{% for skill in skillset %} {{skill|crispy}} {% endfor %}
``` the other templates are the same so i don’t feel there is need for that ---
**Author:** ![KenWhitesell](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.djangoproject.com/kenwhitesell/32/280_2.png) [@KenWhitesell](https://forum.djangoproject.com/u/KenWhitesell)\ **Post date:** [August 1, 2020, 1:26pm UTC](https://forum.djangoproject.com/t/formset-validation/3703/2 "2020-08-01T13:26:10Z")
Do you have any JavaScript that is modifying the form? If so, we’ll need to see that. Any time you change the number of forms in a form set, you need to update the management form. See [https://docs.djangoproject.com/en/3.0/topics/forms/formsets/#understanding-the-managementform](https://docs.djangoproject.com/en/3.0/topics/forms/formsets/#understanding-the-managementform) ``` If you are adding new forms via JavaScript, you should increment the count fields in this form as well. ``` Also, if you included the empty form _in_ the `
`, that might also do it. The empty form should be in a completely separate section. ---
**Author:** ![afekhaijoseph](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.djangoproject.com/afekhaijoseph/32/1709_2.png) [@afekhaijoseph](https://forum.djangoproject.com/u/afekhaijoseph)\ **Post date:** [August 1, 2020, 2:19pm UTC](https://forum.djangoproject.com/t/formset-validation/3703/3 "2020-08-01T14:19:23Z")
yea i increment the count fields using jquery. ``` $('#addworkexp').click(function(e) { e.preventDefault(); console.log('clicked work') var workexp_idx = $('#id_workexp-TOTAL_FORMS').val(); $('#workexp_set').append($('#empty_workexp_form').html().replace(/workexp- __prefix__ /g, workexp_idx)); $('#id_workexp-TOTAL_FORMS').val(parseInt(workexp_idx) + 1); $('#alert-workexp').fadeIn("fast", function(){ $(this).delay(1000).fadeOut("slow"); }); }); ``` when you say "a completely different section do you mean outside the ``? ---
**Author:** ![KenWhitesell](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.djangoproject.com/kenwhitesell/32/280_2.png) [@KenWhitesell](https://forum.djangoproject.com/u/KenWhitesell)\ **Post date:** [August 1, 2020, 2:36pm UTC](https://forum.djangoproject.com/t/formset-validation/3703/4 "2020-08-01T14:36:52Z")
Yes - you don’t want your blank-form template submitted as part of the form. So what you want to check is that the right number of forms is being submitted to match what’s in the management form. (You can use the network tab of your browser developer tools to see what’s being submitted and verify it visually.) If you run into any questions about understanding what’s being submitted, go ahead and post the response data here and we can walk through it. ---
**Author:** ![afekhaijoseph](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.djangoproject.com/afekhaijoseph/32/1709_2.png) [@afekhaijoseph](https://forum.djangoproject.com/u/afekhaijoseph)\ **Post date:** [August 1, 2020, 3:50pm UTC](https://forum.djangoproject.com/t/formset-validation/3703/5 "2020-08-01T15:50:43Z")
So like you said the empty forms were submitting extra empty data so i took the outside the form and that’s fixed but the error still remains the same and so far the only area of the developer tools i am used to is the console since i’m pretty new to django. But here is the data being send. ``` first_name 'john' last_name 'doe' display_picture '' occupation 'software developer' skill-TOTAL_FORMS '1' skill-INITIAL_FORMS '0' skill-MIN_NUM_FORMS '0' skill-MAX_NUM_FORMS 1000' skill-0-skills 'django' skill-0-id '' workexp-TOTAL_FORMS '2' workexp-INITIAL_FORMS '0' workexp-MIN_NUM_FORMS '0' workexp-MAX_NUM_FORMS '1000' workexp-0-company 'andela' workexp-0-started '2015' workexp-0-left '2017' workexp-0-position 'intern' workexp-0-id '' 1-company 'paystack' 1-started '2017' 1-left '2018' 1-position 'junior developer' 1-id '' acadexp-TOTAL_FORMS '1' acadexp-INITIAL_FORMS '0' acadexp-MIN_NUM_FORMS '0' acadexp-MAX_NUM_FORMS '1000' acadexp-0-education 'self taught' acadexp-0-id '' cell '6669994444' twitter 'johndoe' instagram 'doejohn' linkedin 'john though' ``` is this the information you requested? ---
**Author:** ![KenWhitesell](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.djangoproject.com/kenwhitesell/32/280_2.png) [@KenWhitesell](https://forum.djangoproject.com/u/KenWhitesell)\ **Post date:** [August 1, 2020, 3:56pm UTC](https://forum.djangoproject.com/t/formset-validation/3703/6 "2020-08-01T15:56:31Z")
It’s close enough - if you look at the workexp form, you can see that for form 0, you’re submitting entries like workexp-0-company. But for form 1, you’re submitting 1-company. You’ve dropped the workexp prefix from the form entry. ---
**Author:** ![afekhaijoseph](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.djangoproject.com/afekhaijoseph/32/1709_2.png) [@afekhaijoseph](https://forum.djangoproject.com/u/afekhaijoseph)\ **Post date:** [August 2, 2020, 6:37am UTC](https://forum.djangoproject.com/t/formset-validation/3703/7 "2020-08-02T06:37:13Z")
Yes I see that now…but it still doesn’t fix the error ---
**Author:** ![KenWhitesell](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.djangoproject.com/kenwhitesell/32/280_2.png) [@KenWhitesell](https://forum.djangoproject.com/u/KenWhitesell)\ **Post date:** [August 2, 2020, 12:33pm UTC](https://forum.djangoproject.com/t/formset-validation/3703/8 "2020-08-02T12:33:42Z")
Ok, so as the saying goes, we rinse and repeat this process. Ah, I also just noticed that in the portion of the views.py file you posted, you have `prefix='skills'`, `prefix='work-exp'`, and `prefix='acad-exp'`, but the data being supplied you show prefixes of `skill`, `workexp`, and `acadexp`. You didn’t post the `GET` portion of your view, so I can’t compare them to verify an inconsistency. Make sure you’re using the same prefixes as appropriate. If you’re still running into problems after this, please post your complete view, your updated JavaScript and template, and the most current stack trace you’re receiving. ---
**Author:** ![afekhaijoseph](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.djangoproject.com/afekhaijoseph/32/1709_2.png) [@afekhaijoseph](https://forum.djangoproject.com/u/afekhaijoseph)\ **Post date:** [August 2, 2020, 3:34pm UTC](https://forum.djangoproject.com/t/formset-validation/3703/9 "2020-08-02T15:34:30Z")
Ah, this!..this was the problem prefixes were different for the get and post request. Thank you once again for your help. ---
**Author:** ![afekhaijoseph](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.djangoproject.com/afekhaijoseph/32/1709_2.png) [@afekhaijoseph](https://forum.djangoproject.com/u/afekhaijoseph)\ **Post date:** [August 3, 2020, 7:44am UTC](https://forum.djangoproject.com/t/formset-validation/3703/10 "2020-08-03T07:44:01Z")
so i checked the database and it turns out only the data for the first form was saved. Didn’t realize it till i was trying to fix something else