Django Multiple Nested inline formsets

Question

Is this even possible?

I need to store some documents to be retrieved as json/rest.

A Document has many Sections, and a section has a heading, a body and many Images.

Is there a way I can make a form with this structure?

Publication
|-- Section
    |-- Image
    |-- Image
|-- Section
    |-- Image
|-- Section
    |-- Image
    |-- Image
    |-- Image

My models:

class Publication(models.Model):
    title = models.CharField(max_length=64)

class Section(models.Model):
    publication = models.ForeignKey(Publication)
    heading = models.CharField(max_length=128)
    body = models.TextField()

class Image(models.Model):
    section = models.ForeignKey(Section)
    image = models.ImageField(upload_to='images/')
    caption = models.CharField(max_length=64, blank=True)
    alt_text = models.CharField(max_length=64)

I can do this relatively easy when Image is related to Publication, because there is only one level of nesting.

When Image is belongs to Section, though, I'm not sure how to build the form. It seems as though there's no easy way to do this with inline formsets.

Can anyone help?

hellsgate · Accepted Answer · 2013-09-16 13:47:34Z

6

This can't be done in vanilla Django. I use django-nested-inlines for this and it works really well.

from django.contrib import admin
from nested_inlines.admin import NestedModelAdmin, NestedTabularInline

from my.models import Publication, Section, Image


class ImageInline(NestedTabularInline):
    model = Image


class SectionInline(NestedTabularInline):
    model = Section
    inlines = [ImageInline,]


class PublicationAdmin(NestedModelAdmin):
    inlines = [SectionInline,]


admin.site.register(Publication, PublicationAdmin)

edited Sep 16, 2013 at 13:47

answered Sep 16, 2013 at 13:28

hellsgate

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5 Comments

Rob L Over a year ago

Thanks, hellsgate. I'll check into it. My other option may be to make an Image library which is separate from the Sections. And then use a Javascript routine to associate the Images.

hellsgate Over a year ago

I've added a simple code example for how it would work with the nested inlines. Good luck either way

Rob L Over a year ago

I think I looked at django-nested-inlines last week. The thing is, I plan to make my own form for this, rather than django-admin.

hellsgate Over a year ago

Of course, django-nested-inlines is specific to admin so it would need some customisation for use outwith that. It would probably be worthwhile having a look inside the code to work out how it goes about it though, specifically the forms.py.

Rob L Over a year ago

I'm investigating this: yergler.net/blog/2013/09/03/nested-formsets-redux

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