我正尝试在 Django Admin 中过滤带注释的字段,但出现 FieldDoesNotExist
错误。
class Event(models.Model):
name = models.CharField(max_length=50, blank=True)
class EventSession(models.Model):
event = models.ForeignKey(Event, on_delete=models.CASCADE)
start_date = models.DateTimeField()
end_date = models.DateTimeField()
@admin.register(Event)
class EventAdmin(admin.ModelAdmin):
ordering = ["event_start_date"]
list_filter = ["event_start_date", "event_end_date"]
def get_queryset(self, request):
qs = super().get_queryset(request)
qs = qs.annotate(
event_start_date=Min("eventsession_set__start_date"), # start of first day
event_end_date=Max("eventsession_set__start_date"), # start of last day
)
return qs
在 Django Admin 中产生的错误是:
FieldDoesNotExist at /admin/events/event/
Event has no field named 'event_start_date'
我需要根据 event_start_date
而不是 eventsession_set__start_date
进行过滤,因为 filtering ordering (edit) 后者会导致每个事件的多个行(每个 session 一个)显示在 ListView 中。
错误来自 get_field method django/db/models/options.py
:
try:
# Retrieve field instance by name from cached or just-computed
# field map.
return self.fields_map[field_name]
except KeyError:
raise FieldDoesNotExist("%s has no field named '%s'" % (self.object_name, field_name))
我正在使用 Django 3.2。有什么想法吗?
最佳答案
这是一个示例,说明如何在 django 管理列表页面添加排序和按带注释的字段进行过滤
class EventStartDateListFilter(admin.SimpleListFilter):
title = "start_date"
parameter_name = "start_date"
def lookups(self, request, model_admin):
return (
("week", "week"),
# add other filters
)
def queryset(self, request, queryset):
value = self.value()
if value == "week":
return queryset.filter(_event_start_date__gt=now() - timedelta(weeks=1))
return queryset
@admin.register(Event)
class EventAdmin(admin.ModelAdmin):
list_display = ["__str__", "event_start_date", "event_end_date"]
ordering = ["event_start_date", "event_end_date"]
list_filter = [EventStartDateListFilter]
def event_start_date(self, obj):
return obj._event_start_date
event_start_date.admin_order_field = '_event_start_date'
def event_end_date(self, obj):
return obj._event_end_date
event_end_date.admin_order_field = '_event_end_date'
def get_queryset(self, request):
qs = super().get_queryset(request)
qs = qs.annotate(
_event_start_date=Min("eventsession_set__start_date"), # start of first day
_event_end_date=Max("eventsession_set__start_date"), # start of last day
)
return qs
关于Django Admin list_filter 和带注释字段的排序,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/68047139/