For some reason, my form set will not be validated after submission. Any ideas on this could happen?
# models.py
class Department(models.Model): department = models.CharField(verbose_name = "Department Name", max_length=100) description = models.TextField(verbose_name = "Description", blank=True, null=True) sp_description = models.TextField(verbose_name = "Description (Spanish)", blank=True, null=True) phone = PhoneNumberField() phone_ext = models.CharField(max_length=10, blank=True)
# view.py
def display_step5(request): msg = '' email = request.session.get('email') provider_obj = retrieve_provider_instance(email) AddDepartmentFormSet = inlineformset_factory(Provider, Department, extra=0) if is_authenticated(request): AddDepartmentFormSet = inlineformset_factory(Provider, Department, extra=0) if request.method=='POST': if 'add_department' in request.POST: cp = request.POST.copy() cp['department-TOTAL_FORMS'] = int(cp['department-TOTAL_FORMS'])+ 1 new_department = AddDepartmentFormSet(cp, prefix='department', instance=provider_obj) elif 'submit' in request.POST: formset = AddDepartmentFormSet(request.POST, instance=provider_obj) instances = formset.save(commit=False) for instance in instances: instance.provider = provider_obj instance.save() return HttpResponse("Departments have been added") else: new_department = AddDepartmentFormSet(prefix='department', instance=provider_obj) else: return HttpResponseRedirect(reverse('health.register.views.display_auth')) return render_to_response('step5-test.html', {'department': new_department}, context_instance=RequestContext(request))
step5-test.html
<form method='post' action='{{request.path}}'>{% csrf_token %} <fieldset> <legend>Departments</legend> {{ department.management_form }} {% for form in department.forms %} <HR> <div><table>{{form.as_table}}</table></div> {% endfor %} <BR/> <input title='Add a new department' type='submit' name='add_department' value='Add-Another-Department' /> </fieldset> <BR/><BR/> <input title='Submit this form' type='submit' name='submit' value='Submit' /> </form>
Following (solution):
The proposed Brant gave some insight into why the error occurred. For my case, his understanding helped me build a hack that worked best for my situation. This hack seems to be applicable for forms that can be modified in a certain way in a template. In my case, my form set became complicated and required some ajax to make it more user friendly.
"retrieve_provider_instance (email)" is a dynamic way to get a provider object based on various criteria set in the database (about 200 lines of code vomiting).
The next hack worked for me after some extensive debugging. I solved this by adding this hidden field to my "for" loop template
{% {for form in formset.forms %} <tr> <td> {% if form.instance.pk %} {{ form.DELETE }} <input type='hidden' name="department_set-{{ forloop.counter0 }}-id" id="id_department_set-{{ forloop.counter0 }}-id" value={{ form.instance.pk }} /> {% endif %} Name: <br/> {{ form.department}} <br/> Phone Number: <br/> {{ form.phone }} <br/> Phone Ext: <br/> {{ form.phone_ext }}</td> <td>Description: <br/> {{ form.description }}</td> <td>Description (Spanish): <br/> {{ form.sp_description }}</td> <td>Services Provided: <br/> {{ form.services_offered }}</td> <td></td> </tr> {% endfor %}
I accepted Mark's answer because it was much more applicable to the specific question I asked. We hope this helps other users in the future who try to implement this example. In fact, assigning a “prefix” to submit is the correct way and makes the most sense.
Thanks for all your answers.
Regards Matt
Follow-up : I think I may have found some of my problem. But it has not yet been resolved.
The following is additional information that may help solve the problem. Could erroneous POST data ruin this? And if so, how do I get around this?
This is what happens after the form is submitted (in this case there is only one form):
Traceback is as follows:
File "/home/mhjohnson/webapps/resourcedb/lib/python2.6/django/forms/formsets.py" in _management_form 68. Raise ValidationError ("ManagementForm data is missing or was tampered with")
This is my POST data:
department-0-phone_ext -----> u'222' department-0-id -----> u'' department-0-services_offered -----> u'2' department-0-phone -----> u'222-222-2222' department-INITIAL_FORMS -----> u'0' submit -----> u'Submit' department-MAX_NUM_FORMS -----> u'' department-0-department -----> u'Test 1' department-0-provider -----> u'' department-TOTAL_FORMS -----> u'1' csrfmiddlewaretoken -----> u'92a39322b16ed7e5e10dbd6c5ac64bf4' department-0-description -----> u'Blah blah' department-0-sp_description -----> u'....'
Any ideas?