Let's say I want a system where 5 people want to register a service at once, all starting at the same date.
Explicit: 5 name fields (passed with extra=5) and just one date field.
I have tried with BaseFormSet and add_fields, but then I get five date fields too.
An example forms.py:
class NameForm(forms.Form):
name = forms.CharField()
class DateForm(form.Form):
date = forms.DateField()
An example views.py:
NameFormSet = formset_factory(NameForm, extra=5)
#The line under will not work, but illustrates what I want to do.
NameFormSet.append(DateForm)
if request.method = 'POST':
formset = NameFormSet(request.POST)
#Do validation etc..
else:
formset = NameFormSet()
return render_to_response('template.html', { 'formset' : formset })
Please help =)
Can you just include another DateForm like so?
NameFormSet = formset_factory(NameForm, extra=5)
if request.method = 'POST':
formset = NameFormSet(request.POST)
date_form = DateForm(request.POST)
if formset.is_valid() and date_Form.is_valid():
date = date_form.cleaned_data['date']
for form in formset:
name = form.cleaned_data['name']
# replace registration with registration model name
registration = Registration(name=name, date=date)
registration.save()
return
else:
formset = NameFormSet()
date_form = DateForm()
return render_to_response('template.html', { 'formset' : formset, 'date_form' : date_form })
Related
I'm creating an update view using django-form for updating one of my objects that have the following fields:
class Object(models.Model):
name = models.CharField(max_length=40)
logo = models.ImageField(upload_to='object_logo/')
text_1 = models.TextField()
text_2 = models.TextField()
So, i have created the following form in forms.py:
class ObjectForm(forms.ModelForm):
class Meta:
model = Object
fields = [
'name',
'logo',
'text_1',
'text_2',
]
labels = {
'name': 'Name',
'logo': 'Logo',
'text_1': 'Text 1',
'text_2': 'Text 2',
}
and defined the following view called update_object:
def update_object(request, value):
object = get_object_or_404(Object, pk=value)
if request.method == "POST":
form = ObjectForm(request.POST, request.FILES)
if form.is_valid():
object.name = form.cleaned_data['name']
object.logo = form.cleaned_data['logo']
object.text_1 = form.cleaned_data['text_1']
object.text_2 = form.cleaned_data['text_2']
object.save()
return HttpResponseRedirect(reverse('myApp:detail_object', args=(value, )))
else:
form = ObjectForm(
initial={
'name': object.name,
'logo': object.logo,
'text_1': object.text_1,
'text_2': object.text_2,
}
)
context = {'object': object, 'form': form}
return render(request, 'myApp/update_object.html', context)
My problem is: even with an "initial" value stetted up for logo, i have to select an image every time i will update my object (otherwise i receive the update_object page with the message "This field is required").
Is there a way to make the current object.logo as the pre-defined value of the input in my ObjectForm in the update_object view?
I've already tried to set blank = True in the logo model field (which was a bad idea). I also thought in make an alternative conditional code for form.is_valid() but i dont know how to do it.
Update your forms.py like so:
class ObjectForm(forms.ModelForm):
class Meta:
model = Object
fields = '__all__'
...and views.py:
def update_object(request, value):
object = get_object_or_404(Object, pk=value)
if request.method == "POST":
form = ObjectForm(request.POST, request.FILES, instance=object)
if form.is_valid():
form.save()
return HttpResponseRedirect(reverse('myApp:detail_object', args=(value, )))
else:
form = ObjectForm(instance=object)
context = {'object': object, 'form': form}
return render(request, 'myApp/update_object.html', context)
It can be done like this (more clean)
In case share your template code
I am trying to update a choice field before it is validated in Django. The reason for this is the choice field in question value is the Id of a model that i want to update.
def fuelLogSystemOne(request):
entries = FuelLogSystemOneMod.objects.all().order_by('date')
products = productsMod.objects.all()
if request.method == 'POST':
form = forms.AddFuelLogOneForm(request.POST, request.FILES)
productid = form['product'].value()
product = productsMod.objects.get(id=productid)
product_id = request.POST.get('product')
form.fields['product'].choices = [(product.product_type, product.product_type)]
if form.is_valid():
bucketsRemoved = form['buckets_added'].value()
product.stock -= bucketsRemoved
product.save(['stock'])
instance = form.save(commit=False)
instance.staff = request.user
instance.save()
return redirect('home')
else:
form = forms.AddFuelLogOneForm()
return render(request,'systems/fuellogsystemone.html',{'form':form,'entry':entries,'products':products})
The below part is where i am trying to change the form data before it gets validated so it doesn't say 'Select a valid choice. 1 is not one of the available choices'
product_id = request.POST.get('product')
form.fields['product'].choices = [(product.product_type, product.product_type)]
But when I first submit the form it is still saying 'Select a valid choice.'
At what point does Django validate the form because I am changing the form before the is_valid() method and it still hits this error?
This should be in your form, you have to override the init method, and pass the product id during form initialization in the views
forms.py
class AddFuelLogOneForm(forms.ModelForm):
def __init__(self, *args, **kwargs):
product = kwargs.pop('product', None)
self.fields['product'].choices = [(product.product_type, product.product_type)]
views.py
def fuelLogSystemOne(request):
entries = FuelLogSystemOneMod.objects.all().order_by('date')
products = productsMod.objects.all()
if request.method == 'POST':
product_id = request.POST.get('product')
productid = form['product'].value()
product = productsMod.objects.get(id=productid)
product_id = request.POST.get('product')
form = forms.AddFuelLogOneForm(request.POST, request.FILES, product=product)
if form.is_valid():
bucketsRemoved = form['buckets_added'].value()
product.stock -= bucketsRemoved
product.save(['stock'])
instance = form.save(commit=False)
instance.staff = request.user
instance.save()
return redirect('home')
else:
form = forms.AddFuelLogOneForm()
return render(request,'systems/fuellogsystemone.html',{'form':form,'entry':entries,'products':products})
I am trying to use a ModelForm to save a model.
forms.py
class PurchaseForm(forms.ModelForm):
weight = forms.IntegerField()
class Meta:
model = Purchase
fields = ["number", "pieces"]
views.py
if request.method == "POST":
form = PurchaseForm(request.POST)
if form.is_valid():
purchase = form.save(commit=False)
purchase.contract = Contract.objects.get(number=slug)
weight = form.cleaned_data.get('weight')
if check_weight(weight, purchase.contract):
weight_type = purchase.contract.supplier.market.weights
purchase.lbs, purchase.kgs = generate_weights(weight, weight_type)
purchase.save()
In the view above, I need to prevent the model from saving if the check_weight function returns False.
This function requires some data from the related object. I'm having some trouble figuring this out. What should I do?
If I'm understood your question correctly, this would work,
from django.http import HttpResponse
def my_form_view(request):
if request.method == "POST":
form = PurchaseForm(request.POST)
if form.is_valid():
purchase = form.save(commit=False)
purchase.contract = Contract.objects.get(number=slug)
weight = form.cleaned_data.get('weight')
if check_weight(weight, purchase.contract):
weight_type = purchase.contract.supplier.market.weights
purchase.lbs, purchase.kgs = generate_weights(weight, weight_type)
purchase.save()
return HttpResponse("save success")
return HttpResponse("'check_weight' returned False")
else: # if a GET (or any other method) we'll create a blank form
form = PurchaseForm()
return render(request, 'some_html_template.html', {'form': form})
I want to limit the choices of a ManyToManyField to those matching a ForeignKey. The form displays properly, but upon saving results in an error Select a valid choice. <choice> is not one of the available choices.
Before I was trying to limit the queryset by passing a parameter in the view to the form, and then using that parameter to filter the queryset.
Models:
class VenueEventTimeslot(models.Model):
venue = models.ForeignKey(Venue)
name = models.CharField(max_length=255)
class VenueEvent(models.Model):
venue = models.ForeignKey(Venue)
event_timeslots = models.ManyToManyField(VenueEventTimeslot)
class VenueEventForm(ModelForm):
event_timeslots = ModelMultipleChoiceField(queryset=None, widget=CheckboxSelectMultiple())
def __init__(self, *args, **kwargs): # limit timeslots to those of the venue only
venue_obj = kwargs.pop('venue_obj',None)
super(VenueEventForm, self).__init__(*args,**kwargs)
self.fields['event_timeslots'].queryset=VenueEventTimeslot.objects.filter(venue=venue_obj)
class Meta:
model = VenueEvent
fields = ['event_timeslots']
Views:
#login_required
def calendar(request, pk):
venue = Venue.objects.get(pk = pk)
if request.method == "POST":
form = VenueEventForm(request.POST)
if form.is_valid():
# form stuff
else:
form = VenueEventForm(venue_obj = venue)
context = {'venue':venue, 'form':form}
return render(request, ... , context)
However, if I pass the queryset from the view, it works perfectly.
Models:
class VenueEventTimeslot(models.Model):
# same as above
class VenueEvent(models.Model):
# same as above
class VenueEventForm(ModelForm):
class Meta:
model = VenueEvent
fields = ['date','client_name','event_timeslots']
widgets = {
'date': SelectDateWidget(),
'event_timeslots': CheckboxSelectMultiple(),
}
Views:
#login_required
def calendar(request, pk):
venue = Venue.objects.get(pk = pk)
if request.method == "POST":
form = VenueEventForm(request.POST)
if form.is_valid():
# form stuff
else:
form = VenueEventForm()
form.fields['event_timeslots'].queryset=VenueEventTimeslot.objects.filter(venue=venue)
context = {'venue':venue, 'form':form}
return render(request, ..., context)
Would anyone be able to shed some light on this?
I just solved a problem similar to this yesterday which is right here, How To Exclude A Value In A ModelMultipleChoiceField?, but I think the issue with your init function is the way it is formatted. Instead of venue=venue_obj, you need to change it to pk=venue_obj because it appear you are getting the pk of venue in the view instead of the venue attribute of VenueEvent , and I reformatted your form a bit to make it look cleaner.
forms.py
class VenueEventForm(ModelForm):
def __init__(self, *args, **kwargs): # limit timeslots to those of the venue only
venue_obj = kwargs.pop('venue_obj')
super(VenueEventForm, self).__init__(*args,**kwargs)
self.fields['event_timeslots'] = forms.ModelMultipleChoiceField(widget=forms.CheckboxSelectMultiple(), queryset=VenueEventTimeslot.objects.filter(pk=venue_obj))
class Meta:
model = VenueEvent
fields = ['event_timeslots']
views.py
#login_required
def calendar(request, pk):
venue = Venue.objects.get(pk = pk)
if request.method == "POST":
form = VenueEventForm(request.POST, venue_obj=venue)
if form.is_valid():
# form stuff
else:
print VenueEventForm.errors
else:
form = VenueEventForm(venue_obj=venue)
context = {'venue':venue, 'form':form}
return render(request, ... , context)
I'm a Python/Django newbie and have been facing the following problem for several days now. I've got 2 ModelForms for a Model and the idea is that the data for one will help populate the multiplechoicefield of the second. The multiplechoice field for the second form populates ok but the problem is that the user's choices don't get saved. I've tried the save(commit=false) and save_m2m() but it hasn't fixed the issue.
models.py:
class Question(models.Model):
asker = models.ForeignKey(Student, related_name='asker+')
suggestedHelpers = models.ManyToManyField(Student, related_name='suggested')
chosenHelpers = models.ManyToManyField(Student, related_name='chosen')
class QuestionForm(ModelForm):
class Meta:
model = Question
exclude = ('chosenHelpers','suggestedHelpers', 'asker',)
class HelpersForm(ModelForm):
def suggesthelpers(self, question):
# populate chosenHelpers field according to data from QuestionForm
class Meta:
model = Question
exclude = ('suggestedHelpers', 'asker', 'questionSubj', 'Qtext',)
views.py
def askq_page(request):
question = Question(asker=Student.objects.get(user=request.user))
if request.method == 'POST':
form = QuestionForm(request.POST, instance=question)
if form.is_valid():
question = form.save()
# process data
question.save()
form2 = HelpersForm(instance=question)
form2.suggesthelpers(question)
variables = {'form':form2, 'qid':question.id}
return render_to_response('choosehelper.html', variables,context_instance=RequestContext(request))
else:
variables = RequestContext(request, {'form': QuestionForm()})
return render_to_response('askq.html', RequestContext(request, {'form': QuestionForm(instance=question)}))
def choosehelper_page(request, form='', qid=''):
question = Question.objects.get(id=qid)
if request.method == 'POST':
form2 = HelpersForm(request, instance=question)
# here lies the problem- the data gathered from form2 is not saved i.e. the multiple choices chosen by user are not returned
if form2.is_valid():
question = form2.save()
form2.save_m2m()
helpers = question.chosenHelpers.all()
for helper in helpers:
sentQ = ReceivedQ(question=question)
sentQ.student = helper
sentQ.save()
return render_to_response('questionsent.html', {'helpers': helpers, 'qid': question.id, 'qtext': q}, context_instance=RequestContext(request))
else:
form2 = HelpersForm(instance=question)
form2.suggesthelpers(question)
return render_to_response('choosehelper.html', RequestContext(request, {'form': form2, 'qid': qid}))