Django Forms Newbie Question

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Alright, I\'m at a loss with the Django Forms, as the documentation just doesn\'t seem to quite cover what I\'m looking for. At least it seems to come to a screeching halt once

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天命终不由人

2021-02-03 16:24

First, you create a ModelForm for a given Model. In this example I'm doing it for Quiz but you can rinse and repeat for your other models. For giggles, I'm making the "label" be a Select box with preset choices:

from django.models import BaseModel
from django import forms
from django.forms import ModelForm

CHOICES_LABEL = (
    ('label1', 'Label One'),
    ('label2', 'Label Two')

)

class Quiz(models.Model):
    label = models.CharField(blank=True, max_length=400)
    slug = models.SlugField()

    def __unicode__(self):
        return self.label

class QuizForm(ModelForm):
    # Change the 'label' widget to a select box.
    label = forms.CharField(widget=forms.Select(choices=CHOICES_LABEL))

    class Meta:
       # This tells django to get attributes from the Quiz model
       model=Quiz

Next, in your views.py you might have something like this:

from django.shortcuts import render_to_response
from forms import *
import my_quiz_model

def displayQuizForm(request, *args, **kwargs):
   if request.method == 'GET':
       # Create an empty Quiz object. 
       # Alternately you can run a query to edit an existing object.

       quiz = Quiz()
       form = QuizForm(instance=Quiz)
       # Render the template and pass the form object along to it.
       return render_to_response('form_template.html',{'form': form})

   elif request.method == 'POST' and request.POST.get('action') == 'Save':
       form = Quiz(request.POST, instance=account)
       form.save()
       return HttpResponseRedirect("http://example.com/myapp/confirmsave")

Finally your template would look like this:

<html>
  <title>My Quiz Form</title>
  <body>

  <form id="form" method="post" action=".">

   <ul>
    {{ form.as_ul }}
   </ul>

   <input type="submit" name="action" value="Save">
   <input type="submit" name="action" value="Cancel">
  </form>

  </body>
</html>

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野的像风

2021-02-03 16:29
Yeah I have to agree the documentation and examples are really lacking here. The is no out of the box solution for the case you are describing because it goes three layers deep: quiz->question->answer.

Django has model inline formsets which solve the problem for two layers deep. What you will need to do to generate the form you want is:
1. Load up a quiz form (just a label text box from your model)
2. Load a an question formset: QuestionFormSet(queryset=Question.objects.filter(quiz=quiz))
3. For each question load up a answer formset in much the same way you load up the question formset
4. Make sure you save everything in the right order: quiz->question->answer, since each lower level needs the foreign key of the item above it
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