我在highlight_link模型的 admin.py 类中添加了一个方法：
class RadioGridAdmin(admin.ModelAdmin):
list_display = ('start_time', highlight_link)
def highlight_link(self):
return ('some custom link')
admin.site.register(RadioGrid, RadioGridAdmin)
highlight_link.short_description它为更改列表中返回的每条记录返回一个自定义链接（为简洁起见，我省略了）。这是伟大的。但我想检查当前的查询字符串并根据它更改自定义链接。有没有办法在里面访问请求对象highlight_link？
我这样解决我的问题。
class MyClassAdmin(admin.ModelAdmin):
def queryset(self, request):
qs = super(MyClassAdmin, self).queryset(request)
self.request = request
return qs
现在我可以self.request在任何地方使用
更新
class MyClassAdmin(admin.ModelAdmin):
def get_queryset(self, request):
qs = super(MyClassAdmin, self).get_queryset(request)
self.request = request
return qs
class RadioGridAdmin(admin.ModelAdmin):
def highlight_link(self, obj):
return (self.param)
def changelist_view(self, request, extra_context=None):
self.param = request.GET['param']
return super(RadioGridAdmin,self).changelist_view(request, extra_context=extra_context)
描述了如何将其重构为 mixin，并根据@taha-jahangir 的回答添加了线程安全位。这是混合：
import threading
class ModelAdminRequestMixin(object):
def __init__(self, *args, **kwargs):
# let's define this so there's no chance of AttributeErrors
self._request_local = threading.local()
self._request_local.request = None
super(ModelAdminRequestMixin, self).__init__(*args, **kwargs)
def get_request(self):
return self._request_local.request
def set_request(self, request):
self._request_local.request = request
def changeform_view(self, request, *args, **kwargs):
# stash the request
self.set_request(request)
# call the parent view method with all the original args
return super(ModelAdminRequestMixin, self).changeform_view(request, *args, **kwargs)
def add_view(self, request, *args, **kwargs):
self.set_request(request)
return super(ModelAdminRequestMixin, self).add_view(request, *args, **kwargs)
def change_view(self, request, *args, **kwargs):
self.set_request(request)
return super(ModelAdminRequestMixin, self).change_view(request, *args, **kwargs)
def changelist_view(self, request, *args, **kwargs):
self.set_request(request)
return super(ModelAdminRequestMixin, self).changelist_view(request, *args, **kwargs)
def delete_view(self, request, *args, **kwargs):
self.set_request(request)
return super(ModelAdminRequestMixin, self).delete_view(request, *args, **kwargs)
def history_view(self, request, *args, **kwargs):
self.set_request(request)
return super(ModelAdminRequestMixin, self).history_view(request, *args, **kwargs)
使用 mixin 子类化 ModelAdmin：
class PollAdmin(ModelAdminRequestMixin, admin.ModelAdmin):
pass
...您可以self.get_request()从任何方法调用。
没有直接的方法可以做到这一点。我看到了两种可能的解决方案。
使用线程本地存储到相同的请求对象
from django.utils._threading_local import locals
globals = locals()
class RadioGridAdmin(admin.ModelAdmin):
def __call__(self, request, *args, **kwargs):
globals['radio_grid_admin_request'] = request
return super(RadioGridAdmin, self).__call__(request, *args, **kwargs)
def highlight_link(self):
request = globals['radio_grid_admin_request']
# request.GET processing
return ('some custom link')
如果您使用简单的非线程 Django 安装，则可以将请求对象保存为属性：
class RadioGridAdmin(admin.ModelAdmin):
def __call__(self, request, *args, **kwargs):
self.request = request
return super(RadioGridAdmin, self).__call__(request, *args, **kwargs)
def highlight_link(self):
# self.request.GET processing
return ('some custom link')
小代码澄清了Diego Puente的答案（python 3.6）：
class MyClassAdmin(admin.ModelAdmin):
def __init__(self, model, admin_site):
self.request = None
super().__init__(model, admin_site)
def get_queryset(self, request):
self.request = request
return super().get_queryset(request)
因此，您可以self.request从任何其他方法获得MyClassAdmin.
如果self.request在get_queryset方法中定义（没有在中声明__init__）PyCharm 将生成警告Instance attribute attribute_name defined outside __init__。
这是@user27478 答案的编辑版本，它使用线程本地变量：
class RadioGridAdmin(admin.ModelAdmin):
def __init__(self, model, admin_site):
super().__init__(model, admin_site)
self._request_local = threading.local()
def changelist_view(self, request, extra_context=None):
self._request_local.request = request
return super().changelist_view(request, extra_context)
@property
def _request(self):
return self._request_local.request
def example_highlight_link(self, obj):
changelist = self.get_changelist_instance(self._request)
url = changelist.get_query_string(new_params={'key1': 1})
我尝试了此处留下的其他答案，但遇到了对我来说变得越来越复杂的问题。我玩弄def __call__()并想出了以下内容。这可能不是正确的方法，但它有效......
在此处获取 GET 变量（所有在 RadioGridAdmin 类中，如我最初的帖子中所述）：
def __call__(self, request, url):
global start_date
start_date = request.GET['param']
return super(RadioGridAdmin, self).__call__(request, url)
由于它是全球性的，您现在可以在这里访问它：
def highlight_link(self):
# access start_date here
import threading
_thread_local = threading.local()
def get_thread_local_request():
return getattr(_thread_local, "request", None)
class RadioGridAdmin(admin.ModelAdmin):
list_display = ('display_field', ...)
def display_field(self, obj):
# ...
request = get_thread_local_request()
# ...
from functools import partial, update_wrapper, lru_cache
# Django admin call 2 times get_list_display.
# We need to return the same function to make the method sortable using 'admin_order_field'
# https://github.com/django/django/blob/2161db0792f2e4d3deef3e09cd72f7a08340cafe/django/contrib/admin/templatetags/admin_list.py#L84
@lru_cache(maxsize=100)
def cache_display_wrap(f, request):
wf = partial(f, request)
nf = update_wrapper(wf, f)
return nf
class ModelAdminMixin(admin.ModelAdmin):
def get_list_display(self, request):
def check_needs_request(display):
f = getattr(self, display, None) if not callable(display) else display
if f and getattr(f, 'needs_request', False):
return cache_display_wrap(f, request)
return display
return [check_needs_request(display) for display in super().get_list_display(request)]
from django.contrib import admin
from core.admin_mixins import ModelAdminMixin
@admin.register(AnyModel)
class AnyModelAdmin(ModelAdminMixin, admin.ModelAdminMixin):
list_display = ['id', 'especial_display_with_request']
def especial_display_with_request(self, request, obj):
# Make something special with the request
return obj.any_field
especial_display_with_request.needs_request = True # Similar to short_description or any other django admin attr.
来源：https ://gist.github.com/pricco/24826bae3d5102d963eb13ecc0493f33
这有什么问题：
def highlight_link(self, request):
# access start_date here