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具有ManyToMany关系的ModelForms Django中的模型

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我对Django中的ModelForms有疑问 . 如果我使用ModelForms从模型创建表单,那么表单字段将如何链接到这些M2M关系?我的意思是如果我有:

Models.py

class Recipe(models.Model):
    title = models.CharField(max_length=100)
    category = models.ForeignKey(Category)
    cuisineType = models.ForeignKey(CuisineType)
    description = models.TextField()
    serving = models.CharField(max_length=100)
    cooking_time = models.TimeField()
    ingredients = models.ManyToManyField(RecipeIngredient)
    directions = models.TextField()
    image = models.OneToOneField(Image)
    added_at = models.DateTimeField(auto_now_add=True)
    last_update = models.DateTimeField(auto_now=True)
    added_by = models.ForeignKey(UserProfile, null=False)
    tags = models.ManyToManyField(Tag,blank=True)

class Category(models.Model):

    category = models.CharField(max_length=100)
    category_english = models.CharField(max_length=100)
    #slug = models.SlugField(prepopulate_from=('name_english',))
    slug = models.SlugField()
    parent = models.ForeignKey('self', blank=True, null=True, related_name='child')
    description = models.TextField(blank=True,help_text="Optional")
    class Meta:
        verbose_name_plural = 'Categories'
        #sort = ['category']

Forms.py

class RecipeForm(ModelForm):
    class Meta:
        model = Recipe
        exclude = ('added_at','last_update','added_by')

Views.py

def RecipeEditor(request, id=None):
    form = RecipeForm(request.POST or None,
                       instance=id and Recipe.objects.get(id=id))

    # Save new/edited Recipe
    if request.method == 'POST' and form.is_valid():
        form.save()
        return HttpResponseRedirect('/recipes/')     #TODO: write a url + add it to urls .. this is temp

    return render_to_response('adding_recipe_form.html',{'form':form})

那么我应该像我一样为彼此相关的2个模型创建1个模型吗?或每个模型的模型?如果我这样做,我将如何从其他模型中排除字段?我有点困惑 .

1 回答

  • 1

    1.我应该像我一样为彼此相关的2个模型创建1个模型表单吗?不,你不能 . Django使用this列表来 Build 模型字段以形成字段映射 . 相关字段显示为选择/下拉框 . 这些选择/下拉框中填充了相关字段的现有实例 .

    2.每个模型的模型形式?最好为每个模型创建一个模型表单 .

    3.如果我这样做,我将如何从其他模型中排除字段?如果为每个模型创建模型表单,则可以在其各自的模型表单中使用 exclude .

    比如说:

    class CategoryForm(ModelForm):
          class Meta:
                model = Category
                exclude = ('slug ')
    

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