如何解决如何显示外键子项的Django Admin更改列表视图？
| 我正在使用“广告系列”>“类别”>“帐户”的模型层次结构的应用程序。理想情况下，我希望用户能够单击广告系列管理员列表视图中的链接，并转到\“ / admin / myapp / campaign / 2 / accounts / \”这样的网址，它将显示django管理员视图具有所有方便的ChangeList便利设施，但经过过滤后仅显示指定广告系列中类别中的帐户（即Account.object.filter（category_campaign_id = 2））。 （请注意，类别本身很高兴能够在此帐户列表视图中成为“过滤器”）。 我似乎找不到任何模仿这种在许多其他框架中很常见的模仿“项-键-外键-子项列表”方法的方法的参考。 可能吗？ Django范例中是否有“更好”的方法？ 谢谢你的帮助！解决方法
这是一个有趣的问题，所以我整理了一个示例应用程序来弄清楚。
# models.py
from django.db import models
class Campaign(models.Model):
name = models.CharField(max_length=20)
def __unicode__(self):
return unicode(self.name)
class Category(models.Model):
campaign = models.ForeignKey(Campaign)
name = models.CharField(max_length=20)
def __unicode__(self):
return unicode(self.name)
class Account(models.Model):
category = models.ForeignKey(Category)
name = models.CharField(max_length=20)
def __unicode__(self):
return unicode(self.name)
# admin.py
from django.contrib import admin
from models import Campaign,Category,Account
class CampaignAdmin(admin.ModelAdmin):
list_display = (\'name\',\'related_accounts\',)
def related_accounts(self,obj):
from django.core import urlresolvers
url = urlresolvers.reverse(\"admin:<yourapp>_account_changelist\")
lookup = u\"category__campaign__exact\"
text = u\"View Accounts\"
return u\"<a href=\'%s?%s=%d\'>%s</a>\" % (url,lookup,obj.pk,text)
related_accounts.allow_tags = True
admin.site.register(Campaign,CampaignAdmin)
admin.site.register(Category)
class AccountAdmin(admin.ModelAdmin):
list_display = (\'category\',\'name\')
list_filter = (\'category__campaign\',)
admin.site.register(Account,AccountAdmin)
admin/yourproject/account/?category__id__exact=<category.id>
def account_link(self,obj):
return \'<a href=\"/admin/yourproject/account/?category__id__exact=%s\">Accounts</a>\' % (obj.category.id)
account_link.allow_tags = True
list_display = (\'account_link\',...)
changelist_view
queryset
class AccountAdmin(ModelAdmin):
model = Account
list_display = (\'pk\',\'campaign_changelist\')
# ...
def queryset(self,request):
self._get_params = request.GET
return super(AccountAdmin,self).queryset(request)
def campaign_changelist(self,obj):
url = reverse(\'admin:yourapp_account_changelist\')
querystring = self._get_params.copy()
querystring[\'campaign__id__exact\'] = obj.campaign.pk
return u\'<a href=\"{0}?{1}\">{2}</a>\'.format(
url,querystring.urlencode(),obj.campaign)
campaign_changelist.allow_tags = True
from consensio.models import Account
from django.contrib import admin
from django.conf.urls.defaults import patterns,include,url
class AccountAdmin(admin.ModelAdmin):
campaign_id = 0;
def campaign_account_list(self,request,campaign_id,extra_context=None):
\'\'\'
First create your changelist_view wrapper which grabs the extra
pattern matches
\'\'\'
self.campaign_id = int(campaign_id)
return self.changelist_view(request,extra_context)
def get_urls(self):
\'\'\'
Add your url patterns to get the foreign key
\'\'\'
urls = super(AccountAdmin,self).get_urls()
my_urls = patterns(\'\',(r\'^bycampaign/(?P<campaign_id>\\d+)/$\',self.admin_site.admin_view(self.campaign_account_list))
)
return my_urls + urls
def queryset(self,request):
\'\'\'
Filter the query set based on the additional param if set
\'\'\'
qs = super(AccountAdmin,self).queryset(request)
if (self.campaign_id > 0):
qs = qs.filter(category__campaign__id = self.campaign_id)
return qs
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