Django管理员 - 内联内联（或三次模型编辑） [英] Django admin - inline inlines (or, three model editing at once)

问题描述

我有一套如下所示的模型：

I've got a set of models that look like this:

class Page(models.Model):
    title = models.CharField(max_length=255)

class LinkSection(models.Model):
    page = models.ForeignKey(Page)
    title = models.CharField(max_length=255)

class Link(models.Model):
    linksection = models.ForeignKey(LinkSection)
    text = models.CharField(max_length=255)
    url = models.URLField()

和一个如下所示的admin.py：

and an admin.py that looks like this:

class LinkInline(admin.TabularInline):
    model = Link
class LinkSectionInline(admin.TabularInline):
    model = LinkSection
    inlines = [ LinkInline, ]
class PageAdmin(admin.ModelAdmin):
    inlines = [ LinkSectionInline, ]

我的目标是获得一个管理界面，让我在一个页面上编辑所有内容。这个模型结构的最终结果是生成的视图+模板看起来或多或少如下所示：

My goal is to get an admin interface that lets me edit everything on one page. The end result of this model structure is that things are generated into a view+template that looks more or less like:

<h1>{{page.title}}</h1>
{% for ls in page.linksection_set.objects.all %}
<div>
    <h2>{{ls.title}}</h2>
    <ul>
         {% for l in ls.link_set.objects.all %}
        <li><a href="{{l.url}}">{{l.title}}</a></li>
         {% endfor %}
    </ul>
</div>
{% endfor %}

我知道inline-in-in-in-inline trick正如我所料，Django管理员失败。有人知道一种允许这种三级模型编辑的方法吗？感谢提前。

I know that the inline-in-an-inline trick fails in the Django admin, as I expected. Does anyone know of a way to allow this kind of three level model editing? Thanks in advance.

推荐答案

您需要创建一个自定义表单和模板为 LinkSectionInline 。

You need to create a custom form and template for the LinkSectionInline.

为表单工作：

LinkFormset = forms.modelformset_factory(Link)
class LinkSectionForm(forms.ModelForm):
    def __init__(self, **kwargs):
        super(LinkSectionForm, self).__init__(**kwargs)
        self.link_formset = LinkFormset(instance=self.instance, 
                                        data=self.data or None,
                                        prefix=self.prefix)

    def is_valid(self):
        return (super(LinkSectionForm, self).is_valid() and 
                    self.link_formset.is_valid())

    def save(self, commit=True):
        # Supporting commit=False is another can of worms.  No use dealing
        # it before it's needed. (YAGNI)
        assert commit == True 
        res = super(LinkSectionForm, self).save(commit=commit)
        self.link_formset.save()
        return res

（刚刚从我的头顶上，没有测试，但它应该让你进去正确的方向。）

(That just came off the top of my head and isn't tested, but it should get you going in the right direction.)

您的模板只需要适当地呈现表单和form.link_formset。

Your template just needs to render the form and form.link_formset appropriately.

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