Django inlineformset不保存ForeignKey字段

Question

因此，我正在Django中測試inlineformset功能，到目前為止，它具有以下代碼：

應用名稱：示例

models.py

from django.db import models
from django.core.urlresolvers import reverse

class Recipe(models.Model):
    pub_date = models.DateTimeField('Date Published', auto_now_add= True)
    title = models.CharField(max_length=200)
    instruction = models.TextField()

    def __unicode__(self):
        return self.title

    def get_absolute_url(self):
        return reverse('recipe_edit', kwargs={'pk': self.pk})


class Ingredient(models.Model):
    recipe = models.ForeignKey(Recipe, related_name="ingredients")
    ingredient = models.CharField(max_length=255)

    def __unicode__(self):
        return self.recipe_id

    def get_absolute_url(self):
        return reverse('ingredient_edit', kwargs={'pk': self.recipe_id})

表格

from django import forms
from models import Recipe, Ingredient
from django.forms.models import inlineformset_factory

MAX_INGREDIENTS = 5

IngredientFormSet = inlineformset_factory(
    Recipe,
    Ingredient,
    can_delete=False,
    extra=MAX_INGREDIENTS
)


class UserSubmittedRecipeForm(forms.ModelForm):
    class Meta:
        model = Recipe
        exclude = ('pub_date',)

views.py

def recipe_create(request, template_name='example/recipe_form.html'):
    if request.POST:
        form = UserSubmittedRecipeForm(request.POST)
        if form.is_valid():
            recipe = form.save(commit=False)
            ingredient_formset = UserSubmittedRecipeForm(request.POST, instance=recipe)
            if ingredient_formset.is_valid():
                recipe.save()
                ingredient_formset.save()
                return redirect('recipe_list')
    else:
        form = UserSubmittedRecipeForm()
        ingredient_formset = IngredientFormSet(instance=Recipe())
    return render(request, template_name, {
        "form": form,
        "ingredient_formset": ingredient_formset
    }, context_instance=RequestContext(request))

查看版本2這也不起作用。

def recipe_create(request, template_name='example/recipe_form.html'):
    if request.POST:
        form = UserSubmittedRecipeForm(request.POST)
        if form.is_valid():
            created_recipe = form.save()
            ingredient_formset = UserSubmittedRecipeForm(request.POST, instance=created_recipe)
            if ingredient_formset.is_valid():
                ingredient_formset.save()
                return redirect('recipe_list')
    else:
        form = UserSubmittedRecipeForm()
        recipe = Recipe()
        ingredient_formset = IngredientFormSet(instance=recipe)
    return render(request, template_name, {
        "form": form,
        "ingredient_formset": ingredient_formset
    }, context_instance=RequestContext(request))

我遇到的問題是，每次提交表單時，都不會保存“成分”模型中的“成分”字段。

沒有顯示錯誤。 配方模型中的其余字段會正確保存。

有人知道這是為什么嗎？

Answer 1

視圖的版本2中有一個錯字。 檢查是否可以解決您的問題

Views.py版本2：

   def recipe_create(request, template_name='example/recipe_form.html'):
    if request.POST:
        form = UserSubmittedRecipeForm(request.POST)
        if form.is_valid():
            created_recipe = form.save()
            #There was a typo here
            ingredient_formset = IngredientFormSet(request.POST, instance=created_recipe)
            if ingredient_formset.is_valid():
                ingredient_formset.save()
                return redirect('recipe_list')
    else:
        form = UserSubmittedRecipeForm()
        recipe = Recipe()
        ingredient_formset = IngredientFormSet(instance=recipe)
    return render(request, template_name, {
        "form": form,
        "ingredient_formset": ingredient_formset
    }, context_instance=RequestContext(request))

Answer 2

應該
ingredient_formset = UserSubmittedRecipeForm(request.POST, instance=created_recipe)
是
ingredient_formset = IngredientFormSet(request.POST, instance=created_recipe)嗎？

如果這是問題所在，那么您已經在兩個視圖中都做到了。