python - Integrity Error *_id may not be null -

i'm relatively new python , django please forgive ignorance.

i receiving following error when saving formset

integrityerror @ /jobs/1/ jobs_education.applicant_id may not null 

here view:

def application(request, job_id):     job = get_object_or_404(job, pk=job_id)     #return 404 if job isn't yet published     if (job.pub_date>timezone.now()):     return httpresponsenotfound('<h1>job not found</h1>')       educationinlineformset = inlineformset_factory(applicant, education, extra=1, can_delete=false)      if request.method == 'post':         form = applicantform(request.post)         formset = educationinlineformset(request.post)          if form.is_valid() , formset.is_valid():             # save model database, directly form:             applicant_saved = form.save()             formset.applicant_id = applicant_saved.id             print 'formset %s' % formset.__dict__             formset.save()             return render(request, 'jobs/success.html')       else:         applicant = applicant(job=job)         form = applicantform(instance=applicant)         formset = educationinlineformset(instance=applicant)      c = {      'form' : form ,     'formset' : formset,     }     return render(request, 'jobs/test.html', c) 

as can see, not manually trying set applicant_id of formset isn't making difference.

the output of:

print 'formset %s' % formset.__dict__ 

is

{'auto_id': u'id_%s', 'is_bound': true, 'initial_extra': none, 'error_class': <class 'django.forms.util.errorlist'>, 'save_as_new': false, '_non_form_errors': [], 'initial': none, 'queryset': [], '_pk_field': <django.db.models.fields.autofield: id>, 'forms': [<django.forms.models.educationform object @ 0x1014078d0>], 'instance': <applicant: >, 'prefix': u'education_set', 'applicant_id': 4, 'data': <querydict: {u'education_set-0-date': [u'1989-05-19'], u'education_set-0-school': [u'asdf'], u'education_set-0-grade': [u'oi'], u'telephone': [u'mlk'], u'nationality': [u'lk'], u'address_postcode': [u'lk'], u'address_line2': [u'lkm'], u'address_line1': [u'm'], u'education_set-max_num_forms': [u'1000'], u'applicant_dob': [u'1989-05-14'], u'address_district': [u'lkm'], u'csrfmiddlewaretoken': [u'3tfdncwqyswkyotjebx6peuvcgranskj'], u'email': [u'lkm@c.com'], u'national_insurance_number': [u'mlk'], u'address_county': [u'lkm'], u'job': [u'1'], u'address_town': [u'lkm'], u'education_set-initial_forms': [u'0'], u'education_set-0-town': [u'sdf'], u'education_set-total_forms': [u'1'], u'applicant_name': [u'asd'], u'education_set-0-applicant': [u''], u'mobile': [u'm'], u'education_set-0-id': [u''], u'applicant_surname': [u'klm'], u'education_set-0-qualification': [u'oj']}>, '_errors': [{}], 'files': {}} 

please let me know if there else can provide with.

thanks in advance,

chris

edit:

adding models here bound ask them

class location(models.model):     location_name = models.charfield(max_length=50)     def __str__(self):     return self.location_name  class job(models.model):     location = models.foreignkey(location)     job_title = models.charfield(max_length=50)     pub_date = models.datetimefield('date published')     def __str__(self):         return self.job_title  class applicant(models.model):     job = models.foreignkey(job)     applicant_name = models.charfield(max_length=50)     applicant_surname = models.charfield(max_length=50)     applicant_dob = models.datefield('date of birth')     nationality = models.charfield(max_length=50)     national_insurance_number=models.charfield(max_length=20)     address_line1=models.charfield(max_length=50)     address_line2=models.charfield(max_length=50)     address_district=models.charfield(max_length=50)     address_town=models.charfield(max_length=50)     address_county=models.charfield(max_length=50)     address_postcode=models.charfield(max_length=50)     telephone=models.charfield(max_length=12)     mobile=models.charfield(max_length=12)     email=models.emailfield(max_length=50)     approved=models.booleanfield(default=false)     def __str__(self):         return self.applicant_name     def isapproved(self):         return self.approved     def approve(self):         self.approved = true  class education(models.model):     applicant = models.foreignkey(applicant)     school=models.charfield(max_length=50)     town=models.charfield(max_length=50)     date=models.datefield('date')     qualification=models.charfield(max_length=50)     grade=models.charfield(max_length=50)     def __str__(self):         return self.school 

a formset set of forms. doesn't have applicant id. trying set 1 doesn't make sense.

you're doing right thing already. in block you're correctly passing instance argument formset instantiation, associate applicant. you're not doing in post block, , should be:

    form = applicantform(request.post, instance=applicant)     formset = educationinlineformset(request.post, instance=applicant)