Django admin - 内联内联(或一次编辑三个模型)

问题描述

我有一组看起来像这样的模型:

类页面(models.Model):标题 = models.CharField(max_length=255)类 LinkSection(models.Model):page = models.ForeignKey(Page)标题 = models.CharField(max_length=255)类链接(模型.模型):linksection = models.ForeignKey(LinkSection)文本 = models.CharField(max_length=255)url = 模型.URLField()

还有一个如下所示的 admin.py:

类 LinkInline(admin.TabularInline):型号=链接类 LinkSectionInline(admin.TabularInline):模型 = 链接部分内联= [链接内联，]类 PageAdmin(admin.ModelAdmin):内联 = [ LinkSectionInline, ]

我的目标是获得一个管理界面，让我可以在一页上编辑所有内容.这种模型结构的最终结果是，事物被生成为一个看起来或多或少像的视图+模板:

<h1>{{page.title}}</h1>{% for ls in page.linksection_set.objects.all %}
<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 %}

正如我所料，我知道 Django 管理员中的 inline-in-an-inline 技巧失败了.有谁知道允许这种三级模型编辑的方法?提前致谢.

解决方案

你需要创建一个自定义 表单 和 模板 用于 LinkSectionInline.

这样的东西应该适用于表单:

LinkFormset = forms.modelformset_factory(Link)类 LinkSectionForm(forms.ModelForm):def __init__(self, **kwargs):super(LinkSectionForm, self).__init__(**kwargs)self.link_formset = LinkFormset(instance=self.instance,数据=self.data 或无，前缀=self.prefix)def is_valid(self):return (super(LinkSectionForm, self).is_valid() 和self.link_formset.is_valid())def保存(自我，提交=真):# 支持 commit=False 是另一种蠕虫.没有用的交易# 在需要它之前.(雅尼)断言提交 == 真res = super(LinkSectionForm, self).save(commit=commit)self.link_formset.save()返回资源

(这只是我的想法，没有经过测试，但它应该能让你朝着正确的方向前进.)

您的模板只需要适当地呈现表单和 form.link_formset.

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()

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, ]

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 %}

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.

解决方案

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

Something like this should work for the form:

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

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

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