Django之model admin自定義后台管理

Admin管理界面是django的殺手級應用。它讀取你模式中的元數據，然后提供給你一個強大而且可以使用的界面，網站管理者可以用它立即向網站中添加內容。

比如,數據表如下:

from django.db import models

# Create your models here.
class Author(models.Model):
    #作者
    name = models.CharField(max_length=30,verbose_name='姓名')#姓名
    age = models.CharField(max_length=30,verbose_name='年齡')#年齡
    phone = models.CharField(max_length=11,verbose_name='手機號')#手機號
    email = models.EmailField(verbose_name='郵箱')#郵箱
    def __str__(self):
        return self.name
    class Meta:
        verbose_name = '作者'
        verbose_name_plural = '作者'
class Publisher(models.Model):#出版社
    name = models.CharField(max_length=30,verbose_name='出版社')#出版社姓名
    address = models.CharField(max_length=50,verbose_name='地址')#出版社地址
    city = models.CharField(max_length=60,verbose_name='城市')#出版社城市
    state_province = models.CharField(max_length=30,verbose_name='省份')#省份
    country = models.CharField(max_length=50,verbose_name='國家')#國家
    website = models.URLField(verbose_name='官網')#官網
    def __str__(self):
        return self.name
    class Meta:
        verbose_name = '出版社'
        verbose_name_plural = '出版社'
class Book(models.Model):#書
    name = models.CharField(max_length=60,verbose_name='書名')#書名
    author = models.ManyToManyField(Author,verbose_name='作者')#關聯作者
    publisher = models.ForeignKey(Publisher,verbose_name='出版社')#關聯
    publication_date = models.DateField(verbose_name='出版時間')#時間
    def __str__(self):
        return self.name
    class Meta:
        verbose_name = '書名'
        verbose_name_plural = '書名'

要使用admin，可以按照下面的步驟：

1. 將'django.contrib.admin'加入setting的INSTALLED_APPS配置中。

2. 保證INSTALLED_APPS中,包含'django.contrib.auth'，'django.contrib.contenttypes'，'django.contrib.messages'和'django.contrib.sessions.'，Django的admin需要這4個包。

   settings.py:

   INSTALLED_APPS = [
       'django.contrib.admin',
       'django.contrib.auth',
       'django.contrib.contenttypes',
       'django.contrib.sessions',
       'django.contrib.messages',
       'django.contrib.staticfiles',
       'book',
       ] 
   

3. 將'django.contrib.messages.context_processors.messages'添加到 TEMPLATE_CONTEXT_PROCESSORS中，並確保MIDDLEWARE_CLASSES 包含'django.contrib.auth.middleware.AuthenticationMiddleware'和'django.contrib.messages.middleware.MessageMiddleware'。 (默認已加入)

4. 確定哪些Model需要應用到admin中。

5. 為每個需要admin的app中的admin.py中創建一個ModelAdmin。

6. 注冊Model及ModelAdmin:

   from django.contrib import admin
   from myproject.myapp.models import Author
           
   class AuthorAdmin(admin.ModelAdmin):
   pass
   admin.site.register(Author, AuthorAdmin)
   

7. 將admin訪問配置在URLconf中

   from django.contrib import admin
   admin.autodiscover()
   
   # And include this URLpattern...
   urlpatterns = patterns('',
       # ...
       (r'^admin/', include(admin.site.urls)),
       # ...
   )
   

8. 運行python manage.py migrate提醒創建superuser后就可以訪問 http://127.0.0.1:8000/admin/ 了。其實就是生成表結構的過程:

   python manage.py makemigrations
   python manage.py migrate
   python manage.py createsuperuser
   

ModelAdmin對象

register裝飾器

register(*models[, site=django.admin.sites.site])

1.7中新添加。Model和ModelAdmin可以這樣注冊：

from django.contrib import admin
from .models import Author
 
@admin.register(Author)
class AuthorAdmin(admin.ModelAdmin):
    pass

可以一次注冊多個Model，並且可以使用自己定制的AdminSite：

from django.contrib import admin
from .models import Author, Reader, Editor
from myproject.admin_site import custom_admin_site
 
@admin.register(Author, Reader, Editor, site=custom_admin_site)
class PersonAdmin(admin.ModelAdmin):
    pass

Admin是如何工作的

當把'django.contrib.admin'添加到INSTALLED_APPS后，django會自動查找每個app中的admin.py模塊並且import載入。

class apps.AdminConfig

Django 1.7新增.

admin默認的AppConfig類.當django啟動時會執行autodiscover()。

class apps.SimpleAdminConfig

Django 1.7新增.

類似於AdminConfig,不會執行autodiscover().

autodiscover()

import每個app的admin.py模塊。

Django 1.7改變:
在以前的版本中需要在urls.py中手動啟動此方法去尋找每個app的admin.py，1.7后AdminConfig會自動執行此方法。

如果正在使用定制的AdminSite，需要將ModelAdmin的子類載入到自己的代碼中並全部注冊到定制的AdminSite中。這種情況下需要停止自動discovery()，可以將'django.contrib.admin.apps.SimpleAdminConfig'代替INSTALLED_APPS中的'django.contrib.admin'。

ModelAdmin選項

actions

admin actions的列表

actions_on_top / actions_on_bottom

action的位置。

date_hierarchy

將date_hierarchy設成Model的DateField或者DateTimeField，就可以為admin中的此Model添加日期層次。

fields / exclude

決定Model的form中展現哪些字段。fields是包括，exclude是排除。

from django.contrib import admin
 
class AuthorAdmin(admin.ModelAdmin):
    fields = ('name', 'title')
 
class AuthorAdmin(admin.ModelAdmin):
    exclude = ('birth_date',)

可以將一些字段放在同一行，如下url和title字段放在同一行：

class FlatPageAdmin(admin.ModelAdmin):
    fields = (('url', 'title'), 'content')

fieldsets

fieldsets是雙元元組(name, field_options)的列表，可以將字段分塊：

from django.contrib import admin
 
class FlatPageAdmin(admin.ModelAdmin):
    fieldsets = (
        (None, {
            'fields': ('url', 'title', 'content', 'sites')
        }),
        ('Advanced options', {
            'classes': ('collapse',),
            'fields': ('enable_comments', 'registration_required', 'template_name')
        }),
    )    

name

name是塊的標題，field_options是一個字典。

field_options

field_options的key有下面幾種：

fields

字段名稱的元組，在fieldset中展示:

{
'fields': (('first_name', 'last_name'), 'address', 'city', 'state'),
}

classes

提供給fieldset的額外CSS類的列表。

description

可以在fieldset頂部額外展示的文本。

filter_horizontal / filter_vertical

Model有ManyToManyField字段時，使用filter_horizontal，(支持拖拽),filter_vertical可以從現有的選項中多選。一個為橫排，一個為豎排。

form

使用的表單.

from django import forms
from django.contrib import admin
from myapp.models import Person
 
class PersonForm(forms.ModelForm):
 
    class Meta:
        model = Person
        exclude = ['name']
 
class PersonAdmin(admin.ModelAdmin):
    exclude = ['age']
    form = PersonForm

發生沖突時，ModelAdmin優先。上面的例子中age會被排除，但name會在頁面中展示。

formfield_overrides

可以覆蓋Model表單界面的一些字段的選項，為一些特定類型的字段添加自己定制的部件,比如，想為自己Model的TextField字段使用富文本編輯器：

from django.db import models
from django.contrib import admin
 
# Import our custom widget and our model from where they're defined
from myapp.widgets import RichTextEditorWidget
from myapp.models import MyModel
 
class MyModelAdmin(admin.ModelAdmin):
    formfield_overrides = {
        models.TextField: {'widget': RichTextEditorWidget},
    }

list_display

Model的change list頁面可以展示的字段，如果不設置list_display，admin界面會自動展示Model的__unicode__()結果,在python3中為__str__()。

list_display中有4種值：

model的一個字段

list_display = ('first_name', 'last_name')

一個可調用的以model為參數的函數

def upper_case_name(obj):
    return ("%s %s" % (obj.first_name, obj.last_name)).upper()
upper_case_name.short_description = 'Name'
 
class PersonAdmin(admin.ModelAdmin):
    list_display = (upper_case_name,)　

ModelAdmin的一個屬性，類似於可調用函數

class PersonAdmin(admin.ModelAdmin):
    list_display = ('upper_case_name',)
 
    def upper_case_name(self, obj):
        return ("%s %s" % (obj.first_name, obj.last_name)).upper()
    upper_case_name.short_description = 'Name'

Model的一個屬性，類似於可調用函數

from django.db import models
from django.contrib import admin
 
class Person(models.Model):
    name = models.CharField(max_length=50)
    birthday = models.DateField()
 
    def decade_born_in(self):
        return self.birthday.strftime('%Y')[:3] + "0's"
    decade_born_in.short_description = 'Birth decade'
 
class PersonAdmin(admin.ModelAdmin):
    list_display = ('name', 'decade_born_in')

list_display之TIPS:

• 如果字段是ForeignKey，會顯示外鍵的__unicode__。

• 不支持ManyToManyField

• 如果是BooleanField，會顯示on或者off。

• 如果提供的字符串是Model或者ModelAdmin的方法或者一個可調用函數，django會自動的HTML-escape輸出，如果不想轉義，可以將方法的allow_tags設為True。為了避免XSS跨站攻擊，需要使用format_html轉義用戶的輸入：

  from django.db import models
  from django.contrib import admin
  from django.utils.html import format_html
   
  class Person(models.Model):
      first_name = models.CharField(max_length=50)
      last_name = models.CharField(max_length=50)
      color_code = models.CharField(max_length=6)
   
      def colored_name(self):
          return format_html('<span style="color: #{0};">{1} {2}</span>',
                             self.color_code,
                             self.first_name,
                             self.last_name)
   
      colored_name.allow_tags = True
   
  class PersonAdmin(admin.ModelAdmin):
      list_display = ('first_name', 'last_name', 'colored_name')
  

• 如果提供的字符串是Model或者ModelAdmin的方法或者一個可調用函數，並且返回True或者False，可以將方法的boolean屬性設為True。這樣頁面上會展示on或者off圖標。

  from django.db import models
  from django.contrib import admin
   
  class Person(models.Model):
      first_name = models.CharField(max_length=50)
      birthday = models.DateField()
   
      def born_in_fifties(self):
          return self.birthday.strftime('%Y')[:3] == '195'
      born_in_fifties.boolean = True
   
  class PersonAdmin(admin.ModelAdmin):
      list_display = ('name', 'born_in_fifties')　
  

• Model的__str__或者__unicode__方法也可以使用

  list_display = ('__str__', 'some_other_field')
  

• 如果list_display中的項不是數據庫的實際字段，那么不可以以此項排序。反之，則可以以此項排序，可以通過設置 admin_order_field屬性指出這個事實。

  from django.db import models
  from django.contrib import admin
  from django.utils.html import format_html
   
  class Person(models.Model):
      first_name = models.CharField(max_length=50)
      color_code = models.CharField(max_length=6)
   
      def colored_first_name(self):
          return format_html('<span style="color: #{0};">{1}</span>',
                             self.color_code,
                             self.first_name)
   
      colored_first_name.allow_tags = True
      colored_first_name.admin_order_field = 'first_name'
   
  class PersonAdmin(admin.ModelAdmin):
      list_display = ('first_name', 'colored_first_name')
  

  這樣試圖以colored_first_name排序時，django會以first_name排序。可以反向排序：

  colored_first_name.admin_order_field = '-first_name'
  

• list_display中的項也可以是特性：

  class Person(object):
      first_name = models.CharField(max_length=50)
      last_name = models.CharField(max_length=50)
   
      def my_property(self):
          return self.first_name + ' ' + self.last_name
      my_property.short_description = "Full name of the person"
   
      full_name = property(my_property)
   
  class PersonAdmin(admin.ModelAdmin):
      list_display = ('full_name',)　
  

list_display_link

其中的字段會被鏈接到mode的change頁面

class PersonAdmin(admin.ModelAdmin):
    list_display = ('first_name', 'last_name', 'birthday')
    list_display_links = ('first_name', 'last_name')  

list_editable

其中的字段在change list頁面是可以被更改的。在其中的字段也必須在list_display中。

list_filter

其中的字段可以作為過濾器過濾model 。可以是相關域。頁面右邊會出現相應的過濾器選項

class PersonAdmin(admin.UserAdmin):
    list_filter = ('company__name',)

list_max_show_all

show all頁面上的model數目，缺省200。

list_per_page

每個change list頁面的model數目，缺省100。

list_select_related

與select_related()有關。

ordering

排序。

from django.contrib import admin

# Register your models here.
from book import models

class AuthorAdmin(admin.ModelAdmin):
    list_display = ('name','age','phone','email')
    search_fields = ('name','age','phone','email')
    fields = ('name','age','email','phone')
    #按照年齡排序
    ordering = ('age',)
#將作者注冊到admin后台
admin.site.register(models.Author,AuthorAdmin)

paginator

使用的分頁。缺省django.core.paginator.Paginator 。

prepopulated_fields

預置字段。

radio_fields

使用radio-button代替select-box( ForeignKey或者有choices選項時)。

class PersonAdmin(admin.ModelAdmin):
    radio_fields = {"group": admin.VERTICAL}

raw_id_fields

會展示其中字段的id，用於ForeignKey或者ManyToManyField。

class ArticleAdmin(admin.ModelAdmin):
    raw_id_fields = ("newspaper",)

readonly_fields

只可讀不可編輯的字段。也可以是方法：

from django.contrib import admin
from django.utils.html import format_html_join
from django.utils.safestring import mark_safe
 
class PersonAdmin(admin.ModelAdmin):
    readonly_fields = ('address_report',)
 
    def address_report(self, instance):
        # assuming get_full_address() returns a list of strings
        # for each line of the address and you want to separate each
        # line by a linebreak
        return format_html_join(
            mark_safe('<br/>'),
            '{0}',
            ((line,) for line in instance.get_full_address()),
        ) or "<span class='errors'>I can't determine this address.</span>"
 
    # short_description functions like a model field's verbose_name
    address_report.short_description = "Address"
    # in this example, we have used HTML tags in the output
    address_report.allow_tags = True

save_as

設為Ture時，change頁面的 "Save and add another"按鈕會被"Save as"代替。

save_on_top

設為Ture時，change頁面的頂端也會有save按鈕。

search_fields

可搜索字段。這樣就可以按照標題或內容搜索了

from django.contrib import admin

# Register your models here.
from book import models

class AuthorAdmin(admin.ModelAdmin):
    list_display = ('name','age','phone','email')
    #添加搜索功能
    search_fields = ('name','age','phone','email')
#將作者注冊到admin后台
admin.site.register(models.Author,AuthorAdmin)

view_on_site

是否顯示View on site鏈接。

template options

一些定制admin模板時指定模板所用的選項。

add_form_template

add_view()使用的模板.

change_form_template

change_view()使用的模板.

change_list_template

changelist_view()使用的模板.

delete_confirmation_template

delete_view()使用的模板。

delete_selected_confirmation_template

delete_selected action method 使用的模板。

ModelAdmin.object_history_template

history_view()使用的模板，日志。

ModelAdmin methods

save_model(request, obj, form, change)

此方法為admin界面用戶保存model實例時的行為。request為HttpRequest實例，obj為model實例，form為ModelForm實例，change為bool值，取決於model實例是新增的還是修改的。

重寫此方法可以做一些pre-save或者post-save行為。

比如，可以把request.user保存為model實例的屬性：

from django.contrib import admin
 
class ArticleAdmin(admin.ModelAdmin):
    def save_model(self, request, obj, form, change):
        obj.user = request.user
        obj.save()

delete_model(request, obj)

admin界面用戶刪除model實例時的方法。

save_formset(request, form, formset, change)

admin界面用戶保存formset的方法，可以改寫：

class ArticleAdmin(admin.ModelAdmin):
    def save_formset(self, request, form, formset, change):
        instances = formset.save(commit=False)
        for instance in instances:
            instance.user = request.user
            instance.save()
        formset.save_m2m()

get_ordering(request)

排序

class PersonAdmin(admin.ModelAdmin):
 
    def get_ordering(self, request):
        if request.user.is_superuser:
            return ['name', 'rank']
        else:
            return ['name']

get_search_results(request, queryset, search_term)

可以定制查詢結果

save_related(request, form, formsets, change)

formsets是model的inline formsets的列表。model的相關對象保存時的行為。

def save_related(self, request, form, formsets, change):
    """
    Given the ``HttpRequest``, the parent ``ModelForm`` instance, the
    list of inline formsets and a boolean value based on whether the
    parent is being added or changed, save the related objects to the
    database. Note that at this point save_form() and save_model() have
    already been called.
    """
    form.save_m2m()
    for formset in formsets:
        self.save_formset(request, form, formset, change=change)

get_readonly_fields(request, obj=None)

返回只讀字段。

get_prepopulated_fields(request, obj=None)

返回預置字段。

get_list_display(request)

返回list_display。

get_list_display_links(request, list_display)

返回list_display_link。

get_fields(request, obj=None)

返回fields。

get_fieldsets(request, obj=None)

返回fieldsets。

get_list_filter(request)

返回list_filter。

get_search_fields(request)

返回search_fields。

get_inline_instances(request, obj=None)

返回InlineModelAdmin對象的列表或元組

class MyModelAdmin(admin.ModelAdmin):
    def get_inline_instances(self, request, obj=None):
        return [inline(self.model, self.admin_site) for inline in self.inlines]

get_urls()

返回ModelAdmin的可用urls。

class MyModelAdmin(admin.ModelAdmin):
    def get_urls(self):
        urls = super(MyModelAdmin, self).get_urls()
        my_urls = patterns('',
            (r'^my_view/$', self.my_view)
        )
        return my_urls + urls
 
    def my_view(self, request):
        # custom view which should return an HttpResponse
        pass

上面my_view方法的路徑就是 /admin/myapp/mymodel/my_view/ 。

不過上面的例子中無驗證和緩存，要提供驗證和緩存：

class MyModelAdmin(admin.ModelAdmin):
    def get_urls(self):
        urls = super(MyModelAdmin, self).get_urls()
        my_urls = patterns('',
            (r'^my_view/$', self.admin_site.admin_view(self.my_view))
        )
        return my_urls + urls

如果頁面可緩存而還是要進行權限驗證：

(r'^my_view/$', self.admin_site.admin_view(self.my_view, cacheable=True))

get_form(request, obj=None, **kwargs)

返回add和change view使用的ModelForm。下面用戶非superuser時會隱藏一些字段。

class MyModelAdmin(admin.ModelAdmin):
    def get_form(self, request, obj=None, **kwargs):
        self.exclude = []
        if not request.user.is_superuser:
            self.exclude.append('field_to_hide')
        return super(MyModelAdmin, self).get_form(request, obj, **kwargs)

get_formsets(request, obj=None)

Yields InlineModelAdmins for use in admin add and change views.

如果只想在the change view中展示一個特殊的inline：

class MyModelAdmin(admin.ModelAdmin):
    inlines = [MyInline, SomeOtherInline]
 
    def get_formsets(self, request, obj=None):
        for inline in self.get_inline_instances(request, obj):
            # hide MyInline in the add view
            if isinstance(inline, MyInline) and obj is None:
                continue
            yield inline.get_formset(request, obj)

get_formsets_with_inlines(request, obj=None)

Yields (FormSet, InlineModelAdmin) pairs for use in admin add and change views.

如果只想在the change view中展示一個特殊的inline：

class MyModelAdmin(admin.ModelAdmin):
    inlines = [MyInline, SomeOtherInline]
 
    def get_formsets_with_inlines(self, request, obj=None):
        for inline in self.get_inline_instances(request, obj):
            # hide MyInline in the add view
            if isinstance(inline, MyInline) and obj is None:
                continue
            yield inline.get_formset(request, obj), inline

formfield_for_foreignkey(db_field, request, **kwargs)

Foreignkey字段使用的默認formfield. 根據不同的用戶返回不同的子集：

class MyModelAdmin(admin.ModelAdmin):
    def formfield_for_foreignkey(self, db_field, request, **kwargs):
        if db_field.name == "car":
            kwargs["queryset"] = Car.objects.filter(owner=request.user)
        return super(MyModelAdmin, self).formfield_for_foreignkey(db_field, request, **kwargs)

formfield_for_manytomany(db_field, request, **kwargs)

類似於formfield_for_foreignkey，這個方法用於many to many字段.：

class MyModelAdmin(admin.ModelAdmin):
    def formfield_for_manytomany(self, db_field, request, **kwargs):
        if db_field.name == "cars":
            kwargs["queryset"] = Car.objects.filter(owner=request.user)
        return super(MyModelAdmin, self).formfield_for_manytomany(db_field, request, **kwargs)

ModelAdmin.formfield_for_choice_field(db_field, request, **kwargs)

類似於formfield_for_foreignkey和formfield_for_manytomany,這個方法用於choices：

class MyModelAdmin(admin.ModelAdmin):
    def formfield_for_choice_field(self, db_field, request, **kwargs):
        if db_field.name == "status":
            kwargs['choices'] = (
                ('accepted', 'Accepted'),
                ('denied', 'Denied'),
            )
            if request.user.is_superuser:
                kwargs['choices'] += (('ready', 'Ready for deployment'),)
        return super(MyModelAdmin, self).formfield_for_choice_field(db_field, request, **kwargs)

ModelAdmin.get_changelist(request, **kwargs)

返回changelist頁面使用的Changelis類. 缺省django.contrib.admin.views.main.ChangeList。

ModelAdmin.get_changelist_form(request, **kwargs)

返回changelist頁面使用的ModelForm類。

from django import forms
 
class MyForm(forms.ModelForm):
    pass
 
class MyModelAdmin(admin.ModelAdmin):
    def get_changelist_form(self, request, **kwargs):
        return MyForm

ModelAdmin.get_changelist_formset(request, **kwargs)

返回changelist頁面使用的ModelFormSet類。

from django.forms.models import BaseModelFormSet
 
class MyAdminFormSet(BaseModelFormSet):
    pass
 
class MyModelAdmin(admin.ModelAdmin):
    def get_changelist_formset(self, request, **kwargs):
        kwargs['formset'] = MyAdminFormSet
        return super(MyModelAdmin, self).get_changelist_formset(request, **kwargs)

ModelAdmin.has_add_permission(request)

是否具有add權限。

ModelAdmin.has_change_permission(request, obj=None)

是否具有change權限。

ModelAdmin.has_delete_permission(request, obj=None)

是否具有delete權限。

ModelAdmin.get_queryset(request)

返回admin界面可編輯的model QuerySet集。 根據不同的user返回不同的結果：

class MyModelAdmin(admin.ModelAdmin):
    def get_queryset(self, request):
        qs = super(MyModelAdmin, self).get_queryset(request)
        if request.user.is_superuser:
            return qs
        return qs.filter(author=request.user)

ModelAdmin.message_user(request, message, level=messages.INFO, extra_tags='', fail_silently=False)

向使用django.contrib.messages backend的用戶發送信息。

ModelAdmin.get_paginator(queryset, per_page, orphans=0, allow_empty_first_page=True)

返回一個分頁實例。Returns an instance of the paginator to use for this view. By default, instantiates an instance of paginator.

ModelAdmin.response_add(request, obj, post_url_continue=None)

決定add_view()的HttpResponse，model被創建后運行。

ModelAdmin.response_change(request, obj)

決定change_view()的HttpResponse，model被修改后運行。

ModelAdmin.response_delete(request, obj_display)

決定delete_view()的HttpResponse，model被刪除后運行。

obj_display是被刪除對象的name。

ModelAdmin.get_changeform_initial_data(request)

A hook for the initial data on admin change forms. By default, fields are given initial values from GET parameters. For instance, ?name=initial_value will set the name field’s initial value to be initial_value.

This method should return a dictionary in the form {'fieldname': 'fieldval'}:

def get_changeform_initial_data(self, request):
    return {'name': 'custom_initial_value'}

其他方法

ModelAdmin.add_view(request, form_url='', extra_context=None)

Django view for the model instance addition page. See note below.

ModelAdmin.change_view(request, object_id, form_url='', extra_context=None)

Django view for the model instance edition page. See note below.

ModelAdmin.changelist_view(request, extra_context=None)

Django view for the model instances change list/actions page. See note below.

ModelAdmin.delete_view(request, object_id, extra_context=None)

Django view for the model instance(s) deletion confirmation page. See note below.

ModelAdmin.history_view(request, object_id, extra_context=None)

Django view for the page that shows the modification history for a given model instance.

這5個方法是被實際的設定為django的view方法的。可以重構，一般是添加渲染view使用的模板的context data：

class MyModelAdmin(admin.ModelAdmin):
 
    # A template for a very customized change view:
    change_form_template = 'admin/myapp/extras/openstreetmap_change_form.html'
 
    def get_osm_info(self):
        # ...
        pass
 
    def change_view(self, request, object_id, form_url='', extra_context=None):
        extra_context = extra_context or {}
        extra_context['osm_data'] = self.get_osm_info()
        return super(MyModelAdmin, self).change_view(request, object_id,
            form_url, extra_context=extra_context)

ModelAdmin asset definitions

為ModelAdmin的 add/change views添加js和css：

class ArticleAdmin(admin.ModelAdmin):
    class Media:
        css = {
            "all": ("my_styles.css",)
        }
        js = ("my_code.js",)

Adding custom validation to the admin

定制form:

class MyArticleAdminForm(forms.ModelForm):
    def clean_name(self):
        # do something that validates your data
        return self.cleaned_data["name"]
class ArticleAdmin(admin.ModelAdmin):
    form = MyArticleAdminForm