Django后台默认只有一个动作Delete selected xxxxs, 那么如果自定义动作该怎么办， 也很容易， 直接写个类似于这种的函数
def make_published(modeladmin, request, queryset):
queryset.update(status='p')
然后绑定到ModelAdmin的actions属性
admin.py
class TriggerAdmin(admin.ModelAdmin):
empty_value_display = u'无规则'
list_display = ('__str__', 'id')
search_fields = ('description',)
list_filter = (IpFilter, 't_type')
actions = (make_published,) #指定自定义actions
action在程序启动后就会正常工作， 现在我有个项目需要根据一张表（role表）来动态扩展动作， 所以这种方法没有办法扩展。 总不能在role表加一个数据就要重启django把？ 显然不能这样做， 当然django有动态生成action的方法, 那就是admin.ModelAdmin的get_actions()方法
首先写个闭包
根据role生成action function
actions.py
from django.utils.translation import ugettext as _, ugettext_lazy
from controller.models import SwitchRole
from controller.models import ConvergeRole
def _with_role(role, switch=True):
"""闭包实现， 设置role, switch为通用变量, 返回一个action函数"""
# 根据role类型判断字段类型
if isinstance(role, SwitchRole):
field_name = "switch_role"
elif isinstance(role, ConvergeRole):
field_name = "converge_role"
else:
return None
def set_selected(modeladmin, request, queryset):
"""
规则动作
"""
# 根据开关选项， 来判断字段value
kwargs = {}
if switch:
field_value = role.pk
else:
field_value = None
kwargs[field_name] = field_value
return queryset.update(**kwargs)
set_selected.short_description = ugettext_lazy(u"设置规则为: %s" % role)
set_selected.__name__ = "set_role_%s_%s" % (field_name, role.pk)
return set_selected
注意: set_selected.short_description为后台管理界面actions下拉菜单显示的文本， set_selected.__name__ 是函数的名称， 由于我们是多个，所以函数的名称一定要唯一.
下面重写get_actions()
admin.py
class TriggerAdmin(admin.ModelAdmin):
empty_value_display = u'无规则'
list_display = ('__str__', 'id', 'ip', 't_type',
'get_converge', 'get_switch', 'level')
search_fields = ('description',)
list_filter = (IpFilter, 't_type', 'converge_role', 'switch_role', 'level')
def get_actions(self, request):
# 设置Role动作
fns = [ _with_role(i) for i in SwitchRole.objects.all() ]
fns += [_with_role(i) for i in ConvergeRole.objects.all()]
# 清空Role动作
if SwitchRole.objects.all():
role = _with_role(SwitchRole.objects.all()[0], switch=False)
role.__name__ = 'remove_switch_role'
role.short_description = ugettext_lazy(u"清空开关规则")
fns.append(role)
if ConvergeRole.objects.all():
role = _with_role(ConvergeRole.objects.all()[0], switch=False)
role.__name__ = 'remove_converge_role'
role.short_description = ugettext_lazy(u"清空聚合规则")
fns.append(role)
actions = [ self.get_action(fn) for fn in fns ]
actions = OrderedDict(
(name, (func, name, desc))
for func, name, desc in actions
)
return actions
这样每次刷新页面get_actions都会执行一遍， 做到动态actions.
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