Djangoadminsite(三)InlineModelAdmin

InlineModelAdmin

class InlineModelAdmin
class TabularInline
class StackedInline

For example, there are two Models:

from django.db import models

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

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

If you want to edit book on the Author page:

from django.contrib import admin

class BookInline(admin.TabularInline):
model = Book

class AuthorAdmin(admin.ModelAdmin):
inlines = [
, BookInline,
]

Django provides two subclasses of InlineModelAdmin:

TabularInline
StackedInline
The difference is the template used.

InlineModelAdmin options

The options common to InlineModelAdmin and ModelAdmin are:

form
fieldsets
fields
formfield_overrides
exclude
filter_horizontal
filter_vertical
ordering
PRepopulated_fields
get_queryset()
radio_fields
readonly_fields
raw_id_fields
formfield_for_choice_field()
formfield_for_foreignkey ()
formfield_for_manytomany()
has_add_permission()
has_change_permission()
has_delete_permission()

Additional options are:

InlineModelAdmin.model
The model used inline, required.

InlineModelAdmin.fk_name
The name of the model, used when there are multiple foreign keys.

InlineModelAdmin.formset
Default BaseInlineFormSet.

InlineModelAdmin.form
Default ModelForm. Passed to inlineformset_factory() when creating the formset.

InlineModelAdmin.extra
Extra number of inline.

InlineModelAdmin.get_extra() also returns the extra number of inline.

InlineModelAdmin.max_num
The maximum number that can be displayed.

InlineModelAdmin.get_max_num() also returns this number.

InlineModelAdmin.min_num
The minimum number that can be displayed.

InlineModelAdmin.get_min_num() also returns this number.

InlineModelAdmin.raw_id_fields
Same as ModelAdmin.

class BookInline(admin.TabularInline):
model = Book
raw_id_fields = ("pages",)

InlineModelAdmin.template
The template used.

InlineModelAdmin.verbose_name
overrides verbose_name in meta class.

InlineModelAdmin.verbose_name_plural
Same as above

InlineModelAdmin.can_delete
Defaults to True.

InlineModelAdmin.get_formset(request, obj=None, **kwargs)
Refer to ModelAdmin.get_formsets_with_inlines.

InlineModelAdmin.get_extra(request, obj=None, **kwargs)

class BinaryTreeAdmin(admin.TabularInline):
model = BinaryTree

def get_extra(self, request, obj=None, **kwargs):
extra = 2
if obj:
return extra - obj.binarytree_set.count()
return extra

InlineModelAdmin.get_max_num(request , obj=None, **kwargs)

class BinaryTreeAdmin(admin.TabularInline):
model = BinaryTree

def get_max_num(self, request, obj=None, **kwargs):
max_num = 10
if obj .parent :
              return max_num - 5
                                                  using using using  .             out out through off through off ’s ’ through ’ s ’ through through ‐ ‐ ‐ ‐‐ ‐ back , return max_num to 5
‐ ‐ ‐ ‐ return max_num

InlineModelAdmin.get_min_num(request, obj=None, **kwargs)

See above.

The case of multiple ForeignKeys linking to the same Model

If there are multiple foreign keys:

from django.db import models

class Friendship(models.Model):
to_person = models.ForeignKey(Person, related_name= "friends")
from_person = models.ForeignKey(Person, related_name="from_friends")

Show one of them:

from django.contrib import admin
from myapp.models import Friendship

class FriendshipInline(admin.TabularInline) :
model = Friendship
fk_name = "to_person"

class PersonAdmin(admin.ModelAdmin):
inlines = [
FriendshipInline,
]

Working with many-to-many models

model example ：

from django .db import models

class Person(models.Model):
name = models.CharField(max_length=128)

class Group(models.Model):
name = models.CharField(max_length=128)
members = models .ManyToManyField(Person, related_name='groups')

inlines display: 🎜

from django.contrib import admin

class MembershipInline(admin.TabularInline):
model = Group.members.through

class PersonAdmin(admin.ModelAdmin):
inlines = [
MembershipInline,
]

class GroupAdmin(admin .ModelAdmin):
inlines = [
MembershipInline,
]
exclude = ('members',)

Note:

First, the MembershipInline class points to Group.members.through. The through attribute points to the management of the many- to-many relationship database.

Second, the GroupAdmin must exclude the members field.

Working with many-to-many intermediary models

Explicitly indicate the intermediate model example:

from django.db import models

class Person(models.Model):
name = models.CharField(max_length=128)

class Group(models.Model):
name = models.CharField(max_length=128)
members = models.ManyToManyField(Person, through='Membership')

class Membership(models.Model):
person = models.ForeignKey(Person)
group = models.ForeignKey(Group)
date_joined = models.DateField()
invite_reason = models.CharField(max_length =64)

First step:

class MembershipInline(admin.TabularInline):
model = Membership
extra = 1

Second step:

class PersonAdmin(admin.ModelAdmin):
inlines = (MembershipInline ,)

class GroupAdmin(admin.ModelAdmin):
inlines = (MembershipInline,)

Step 3:

admin.site.register(Person, PersonAdmin)
admin.site.register(Group, GroupAdmin)

Using generic relations as an inline

An example of inline with generically related objects:

from django.db import models
from django.contrib.contenttypes.fields import GenericForeignKey

class Image(models.Model):
image = models.ImageField(upload_to="images")
content_type = models.ForeignKey(ContentType)
object_id = models.PositiveIntegerField()
content_object = GenericForeignKey("content_type", "object_id")

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

If you want to edit the Image instance on the Product add/change page, you can use GenericTabularInline or GenericStackedInline:

from django.contrib import admin
from django.contrib.contenttypes.admin import GenericTabularInline

from myproject.myapp.models import Image, Product

class ImageInline(GenericTabularInline):
model = Image

class ProductAdmin(admin.ModelAdmin):
inlines = [
ImageInline,
]

admin.site .register(Product, ProductAdmin)

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