CreateView et UpdateView basés sur des classes Django avec plusieurs formsets en ligne

J'ai essayé de faire de Django classe CreateView et UpdateView avec plusieurs inline formsets

CreateView fonctionne très bien mais UpdateView ne fonctionne pas correctement, Si quelqu'un a essayé UpdateView avec plusieurs inline formsets, quelqu'un a essayé pls partager updateview extrait de code.

# models.py
from django.db import models
class Recipe(models.Model):
title = models.CharField(max_length=255)
description = models.TextField()
class Ingredient(models.Model):
recipe = models.ForeignKey(Recipe)
description = models.CharField(max_length=255)
class Instruction(models.Model):
recipe = models.ForeignKey(Recipe)
number = models.PositiveSmallIntegerField()
description = models.TextField()
# forms.py
from django.forms import ModelForm
from django.forms.models import inlineformset_factory
from .models import Recipe, Ingredient, Instruction
class RecipeForm(ModelForm):
class Meta:
model = Recipe
IngredientFormSet = inlineformset_factory(Recipe, Ingredient, extra=0)
InstructionFormSet = inlineformset_factory(Recipe, Instruction, extra=0)
# views.py
from django.http import HttpResponseRedirect
from django.views.generic.edit import CreateView, UpdateView
from django.shortcuts import get_object_or_404
from .forms import IngredientFormSet, InstructionFormSet, RecipeForm
from .models import Recipe
class RecipeCreateView(CreateView):
template_name = 'recipe_add.html'
model = Recipe
form_class = RecipeForm
success_url = '/account/dashboard/'
def get(self, request, *args, **kwargs):
self.object = None
form_class = self.get_form_class()
form = self.get_form(form_class)
ingredient_form = IngredientFormSet()
instruction_form = InstructionFormSet()
return self.render_to_response(
self.get_context_data(form=form,
ingredient_form=ingredient_form,
instruction_form=instruction_form))
def post(self, request, *args, **kwargs):
self.object = None
form_class = self.get_form_class()
form = self.get_form(form_class)
ingredient_form = IngredientFormSet(self.request.POST)
instruction_form = InstructionFormSet(self.request.POST)
if (form.is_valid() and ingredient_form.is_valid() and
instruction_form.is_valid()):
return self.form_valid(form, ingredient_form, instruction_form)
else:
return self.form_invalid(form, ingredient_form, instruction_form)
def form_valid(self, form, ingredient_form, instruction_form):
self.object = form.save()
ingredient_form.instance = self.object
ingredient_form.save()
instruction_form.instance = self.object
instruction_form.save()
return HttpResponseRedirect(self.get_success_url())
def form_invalid(self, form, ingredient_form, instruction_form):
return self.render_to_response(
self.get_context_data(form=form,
ingredient_form=ingredient_form,
instruction_form=instruction_form))
class RecipeUpdateView(UpdateView):
template_name = 'recipe_add.html'
model = Recipe
form_class = RecipeForm
def get_success_url(self):
self.success_url = '/account/dashboard/'
return self.success_url
def get_context_data(self, **kwargs):
context = super(RecipeUpdateView, self).get_context_data(**kwargs)
if self.request.POST:
context['form'] = RecipeForm(self.request.POST, instance=self.object)
context['ingredient_form'] = IngredientFormSet(self.request.POST, instance=self.object)
context['instruction_form'] = InstructionFormSet(self.request.POST, instance=self.object)
else:
context['form'] = RecipeForm(instance=self.object)
context['ingredient_form'] = IngredientFormSet(instance=self.object)
context['instruction_form'] = InstructionFormSet(instance=self.object)
return context
def post(self, request, *args, **kwargs):
self.object = None
form_class = self.get_form_class()
form = self.get_form(form_class)
ingredient_form = IngredientFormSet(self.request.POST)
instruction_form = InstructionFormSet(self.request.POST)
if (form.is_valid() and ingredient_form.is_valid() and
instruction_form.is_valid()):
return self.form_valid(form, ingredient_form, instruction_form)
else:
return self.form_invalid(form, ingredient_form, instruction_form)
def form_valid(self, form, ingredient_form, instruction_form):
self.object = form.save()
ingredient_form.instance = self.object
ingredient_form.save()
instruction_form.instance = self.object
instruction_form.save()
return HttpResponseRedirect(self.get_success_url())
def form_invalid(self, form, ingredient_form, instruction_form):
return self.render_to_response(
self.get_context_data(form=form,
ingredient_form=ingredient_form,
instruction_form=instruction_form))

Merci d'avance.

source d'informationauteur ranjithtenz | 2015-01-10

  1. 6

    Ma conjecture est que vous ne pouvez pas faire

    self.object = None

    sur écrasées post méthode dans un UpdateView. Donc, essayez de

    self.object = self.get_object()

    au lieu de cela, une fois que vous avez déjà une instance de l'objet dans ce cas.

  2. 4

    Je ne sais pas si vous avez trouvé une réponse, mais j'ai une version de travail de UpdateView documenté dans ma réponse que l'on trouve ici:

    UpdateView avec inline formsets en essayant de sauver les enregistrements en double?

  3. 1

    Je ne pense pas que la forme régulière de la updateview doit être ajouté au contexte parce que c'est là de toute façon. Un travail Updateview avec inlineformsets pourrait être atteint en moins compliqué. Je me suis basé sur ce Question

    class RecipeUpdateView(UpdateView):
model = Recipe
form_class = RecipeUpdateForm
success_url = "/foo/"
def get_success_url(self):
self.success_url = '/account/dashboard/'
return self.success_url
def get_object(self):
return #your object
def get_context_data(self, **kwargs):
context = super(ShoppingCartView, self).get_context_data(**kwargs)
if self.request.POST:
context['ingredient_form'] = IngredientFormSet(self.request.POST, instance=self.object)
context['instruction_form'] = InstructionFormSet(self.request.POST, instance=self.object)
else:
context['ingredient_form'] = IngredientFormSet(instance=self.object)
context['instruction_form'] = InstructionFormSet(instance=self.object)
return context
def form_valid(self, form):
context = self.get_context_data()
ingredient_form = context['ingredient_form']
instruction_form = context['instruction_form']
if ingredient_form.is_valid() and instruction_form.is_valid():
self.object = form.save()
ingredient_form.instance = self.object
ingredient_form.save()
instruction_form.instance = self.object
instruction_form.save()
return self.render_to_response(self.get_context_data(form=form))
  4. -1

    J'ai donc reconnaître les modèles de formulaire de ce post. Pour obtenir UpdateView travail correctement, vous allez avoir à faire au moins deux, peut être trois choses:

    1. Mise à jour de la self.object = self.get_object() -- après cela, votre capacité à ajouter de manière dynamique devrait fonctionner.

    2. Pour obtenir la dynamique supprime la mise à jour correctement, vous aurez besoin de modifier le modèle de la forme.SUPPRIMER (en deux endroits, les ingrédients et les instructions).

      {{ form.description }}
{% if form.instance.pk %}{{ form.DELETE }}{% endif %}

    3. Pas sûr que c'était nécessaire, mais j'ai ajouté can_delete à l'usine.

      IngredientFormSet = inlineformset_factory(Recipe, Ingredient, fields=('description',), extra=3, can_delete=True)
InstructionFormSet = inlineformset_factory(Recipe, Instruction, fields=('number', 'description',), extra=1, can_delete=True)