用于同时编辑具有外键关系的两个Django模型的表单 [英] form for simultaneously editing two django models with foreign key relationship

问题描述

我正在尝试找到一种简单的方法来创建一种表单，该表单允许同时编辑具有外键关系的两个模型。

I am trying to find a simple way to create a form that allows the editing of two models with foreign key relationship simultaneously.

经过一番研究，似乎内嵌表单集非常接近我想要的

After some research, it seems that Inline formsets come very close to what I want to do.

django文档提供了以下示例：

The django documentation offers this example:

from django.db import models

class Author(models.Model):
    name = models.CharField(max_length=100)

class Book(models.Model):
    author = models.ForeignKey(Author, on_delete=models.CASCADE)
    title = models.CharField(max_length=100)

然后，

>>> from django.forms import inlineformset_factory
>>> BookFormSet = inlineformset_factory(Author, Book, fields=('title',))
>>> author = Author.objects.get(name='Mike Royko')
>>> formset = BookFormSet(instance=author)

让我们假设 Author 有第二个字段， city 。我可以使用 fields 参数在表单中添加城市吗？

Let's suppose Author has a second field, city. Can I use the fields argument to add a city to the form?

如果无法使用内联表单集

If inline formsets are not the way to go, is there another way that generates this joint form?

经过更多研究后，我发现django模型表格。包括2009年的相关模型中的字段，这暗示着内联表单集可能不是走的路。

After some more research, I found django model Form. Include fields from related models from 2009 which hints that inline form sets might not be the way to go.

如果有默认值，我会非常感兴趣

I would be very much interested if there's a default solution with a different factory.

推荐答案

嗯，这与链接的帖子，因为那里的关系是 OneToOne 而不是 ForeignKey 。

Well, this is a bit different from the linked post because there the relationship is a OneToOne and not a ForeignKey.

没有Django工厂（至少我知道）可以做你的事情想要自动。您可以尝试以下操作：

There is no django factory (at least that I know of) to do what you want automatically. You can try the following instead:

• 为 ModelForm 创建一个依赖表（在这种情况下为 Book ）：

• Create a ModelForm for the depended table (Book in this case):

class BookForm(forms.ModelForm):
    class Meta:
        model = Book
        fields = ['name', 'city', 'other_field', ...]

创建一个 inline_formset 用于依赖表：

Create an inline_formset for the depended table:

BookFormSet = inlineformset_factory(Author, Book, form=BookForm)

在您的视图中使用该表单集：

Use the formset in your view:

def my_view(request):
    if request.method == 'POST':
        formset = BookFormSet(request.POST, instance=request.user)
        if formset.is_valid():
            ...
            formset.save()
    else:
        formset = BookFormSet(instance=request.user)
    return render_to_response("template.html", {"formset": formset})

基于类的视图中的OR：带有内联模型形式或表单集的django基于类的视图

OR in a class based view: django class-based views with inline model-form or formset

最后在模板中（此部分需要花点时间才能使它正确，但这是一个普遍的想法）：

Finally in the template (this part needs a bit of fumbling to get it right, but this is a general idea):

<form action="." method="post">
    {% csrf_token %}
    {{ formset }}
    {{ formset.management_form }}
    <input type="submit" value="Submit">
</form>

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