django-orchestra/orchestra/apps/miscellaneous/admin.py

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from django.contrib import admin
from django.core.urlresolvers import reverse
from django.db import models
from django.utils.safestring import mark_safe
from django.utils.translation import ugettext_lazy as _
from orchestra.apps.accounts.admin import AccountAdminMixin
from .models import MiscService, Miscellaneous
class MiscServiceAdmin(admin.ModelAdmin):
list_display = ('name', 'num_instances')
def num_instances(self, misc):
""" return num slivers as a link to slivers changelist view """
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num = misc.instances__count
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url = reverse('admin:miscellaneous_miscellaneous_changelist')
url += '?service={}'.format(misc.pk)
return mark_safe('<a href="{0}">{1}</a>'.format(url, num))
num_instances.short_description = _("Instances")
num_instances.admin_order_field = 'instances__count'
def get_queryset(self, request):
qs = super(MiscServiceAdmin, self).queryset(request)
return qs.annotate(models.Count('instances', distinct=True))
class MiscellaneousAdmin(AccountAdminMixin, admin.ModelAdmin):
list_display = ('service', 'amount', 'account_link')
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def get_fields(self, request, obj=None):
if obj is None:
return ('service', 'account', 'description', 'amount', 'is_active')
if not obj.service.has_amount:
return ('service', 'account_link', 'description', 'is_active')
return ('service', 'account_link', 'description', 'amount', 'is_active')
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admin.site.register(MiscService, MiscServiceAdmin)
admin.site.register(Miscellaneous, MiscellaneousAdmin)