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Djangoadminsite(三)InlineModelAdmin

2019-11-14 17:31:27
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InlineModelAdmin

class InlineModelAdmin
class TabularInline
class StackedInline

举例,有两个Model:

from django.db import modelsclass 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:

from django.contrib import adminclass BookInline(admin.TabularInline):    model = Bookclass 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。

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)

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        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:

from django.db import modelsclass 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:

from django.contrib import adminfrom myapp.models import Friendshipclass FriendshipInline(admin.TabularInline):    model = Friendship    fk_name = "to_person"class PersonAdmin(admin.ModelAdmin):    inlines = [        FriendshipInline,    ]

Working with many-to-many models

model例子:

from django.db import modelsclass 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:

from django.contrib import adminclass MembershipInline(admin.TabularInline):    model = Group.members.throughclass 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:

from django.db import modelsclass 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:

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

第二步:

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

第三步:

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:

from django.db import modelsfrom django.contrib.contenttypes.fields import GenericForeignKeyclass 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:

from django.contrib import adminfrom django.contrib.contenttypes.admin import GenericTabularInlinefrom myproject.myapp.models import Image, Productclass ImageInline(GenericTabularInline):    model = Imageclass ProductAdmin(admin.ModelAdmin):    inlines = [        ImageInline,    ]admin.site.register(Product, ProductAdmin)

  


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