Django admin site(三)InlineModelAdmin
原文:https://www.cnblogs.com/linxiyue/p/4074562.html
InlineModelAdmin
class InlineModelAdmin
class TabularInline
class StackedInline
举例,有两个Model:
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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 ) |
如果想在Author页面上编辑book:
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from django.contrib import admin class BookInline(admin.TabularInline): model = Book class AuthorAdmin(admin.ModelAdmin): inlines = [ BookInline, ] |
Django提供了两个InlineModelAdmin的子类:
TabularInline
StackedInline
区别在于使用的模板。
InlineModelAdmin options选项
InlineModelAdmin和ModelAdmin共通的options有:
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()
额外增加的options有:
InlineModelAdmin.model
inline使用的model,必需。
InlineModelAdmin.fk_name
model的name,当有多个外键时使用。
InlineModelAdmin.formset
缺省BaseInlineFormSet。
InlineModelAdmin.form
缺省ModelForm。当创建formset时传递给inlineformset_factory()。
InlineModelAdmin.extra
inline的额外数目。
InlineModelAdmin.get_extra()也返回inline的额外数目。
InlineModelAdmin.max_num
可展示得最大数目。
InlineModelAdmin.get_max_num()也返回此数字。
InlineModelAdmin.min_num
可展示的最小数目。
InlineModelAdmin.get_min_num()也返回此数目。
InlineModelAdmin.raw_id_fields
同ModelAdmin。
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class BookInline(admin.TabularInline): model = Book raw_id_fields = ( "pages" ,) |
InlineModelAdmin.template
使用的模板。
InlineModelAdmin.verbose_name
覆盖meta class中的verbose_name。
InlineModelAdmin.verbose_name_plural
同上
InlineModelAdmin.can_delete
默认为True。
InlineModelAdmin.get_formset(request, obj=None, **kwargs)
参考ModelAdmin.get_formsets_with_inlines.
InlineModelAdmin.get_extra(request, obj=None, **kwargs)
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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)
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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 return max_num |
InlineModelAdmin.get_min_num(request, obj=None, **kwargs)
见上。
多个 ForeignKey链向同一个Model的情况
如果有多个foreign keys:
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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" ) |
展示其中一个:
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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例子:
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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展示:
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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:
第一 , the MembershipInline类指向Group.members.through. The through attribute指向管理the many-to-many关系的数据库.
第二,, the GroupAdmin 必须排除the members字段.
Working with many-to-many intermediary models
明确指出中间model的例子:
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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 ) |
第一步:
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class MembershipInline(admin.TabularInline): model = Membership extra = 1 |
第二步:
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class PersonAdmin(admin.ModelAdmin): inlines = (MembershipInline,) class GroupAdmin(admin.ModelAdmin): inlines = (MembershipInline,) |
第三步:
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admin.site.register(Person, PersonAdmin) admin.site.register(Group, GroupAdmin) |
Using generic relations as an inline
一个inline with generically related objects例子:
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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 ) |
如果想在Product add/change页面上编辑Image实例,可以使用GenericTabularInline或GenericStackedInline:
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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) |