你好,
如何使用 OR 条件过滤多个字段!?
例如:
first_name = foo OR last_name = bar
相当于:
model.objects.filter(Q(first_name=foo) | Q(last_name=bar))
感谢您打开这个,这与我的问题完全相同。
目前,我收到以下警告:
/usr/local/lib/python3.7/site-packages/django_filters/rest_framework/backends.py:128:
UserWarning: <class 'project.api.views.FooBarViewSet'> is not compatible with schema generation
我有一个看起来像这样的 FilterSet 和 ViewSet:
# models
class FooBarUserAssignment(models.Model):
user = models.ForeignKey("auth.User", on_delete=models.CASCADE)
foobar = models.ForeignKey("FooBar", on_delete=models.CASCADE)
class Meta:
unique_together = (
("user", "foobar"),
)
class FooBarGroupAssignment(models.Model):
group = models.ForeignKey("auth.Group", on_delete=models.CASCADE)
foobar = models.ForeignKey("FooBar", on_delete=models.CASCADE)
class Meta:
unique_together = (
("group", "foobar"),
)
class FooBar(models.Model):
title = models.CharField(max_length=160, unique=True)
users = models.ManyToManyField(
to="auth.User",
through=FooBarUserAssignment,
)
groups = models.ManyToManyField(
to="auth.Group",
through=FooBarGroupAssignment,
)
def __str__(self):
return self.title
# filters
from django_filters import rest_framework as rest_framework_filters
class FooBarFilter(rest_framework_filters.FilterSet):
title = rest_framework_filters.CharFilter(field_name="title", lookup_expr="icontains")
class Meta:
model = FooBar
fields = ("title", )
# viewsets
class FooBarViewSet(ModelViewSet):
queryset = Foobar.objects.order_by("-title")
serializer_class = FooBarSerializer
filterset_class = FooBarFilter
def get_queryset(self):
queryset = self.queryset
q_name = Q()
rel_name = self.request.query_params.get("rel_name", None)
if rel_name:
q_name = Q(users__name=rel_name)
q_groups = Q()
rel_groups = self.request.query_params.get("rel_groups", "").split(",")
if any(rel_groups):
q_groups = Q(groups__name__in=rel_groups)
qs = queryset.filter(q_name | q_groups).distinct()
return qs
我如何构建一个 FilterSet 来执行完全相同的查询?
我能够实现部分FilterSet,但仍然不知道将OR
逻辑从ViewSet.get_queryset()
移动到FilterSet
的最佳方法是什么
import django_filters
from django_filters import rest_framework as rest_framework_filters
class CharInFilter(django_filters.BaseInFilter, rest_framework_filters.CharFilter):
pass
class FooBarFilter(rest_framework_filters.FilterSet):
title = rest_framework_filters.CharFilter(field_name="title", lookup_expr="icontains")
rel_name = rest_framework_filters.CharFilter(field_name="users__name", lookup_expr="exact")
rel_groups = CharInFilter(field_name="groups__name")
class Meta:
model = FooBar
fields = ("title", )
def filter_queryset(self, queryset):
qs = super().filter_queryset(queryset)
return qs.distinct()
看起来这是 django-filter 扩展的一部分,可以安装在 django-filter 旁边。 https://github.com/philipn/django-rest-framework-filters#complex -operations
大家好。 我创建了#1167,它应该提供组级验证和过滤。 对于 OP,用法如下所示:
class UserFilter(FilterSet):
class Meta:
model = User
field = ['username', 'first_name', 'last_name']
groups = [
CombinedGroup(filters=['first_name', 'last_name'], combine=operator.or_),
]
任何关于 PR 的反馈将不胜感激。
这里仍然是同样的问题,他们有解决方案吗?
@JeromeK13看起来什么都不是! 我有同样的问题
我做了类似以下的事情,我不确定是否适用于所有情况,但解决了我的问题:
class BaseFilter(django_filters.FilterSet):
def OR(self, queryset, field_name, value):
if not hasattr(self, "groups"):
setattr(self, "groups", {})
self.groups[field_name] = value
return queryset
<strong i="6">@property</strong>
def qs(self):
base_queryset = super().qs
if not hasattr(self, "groups"):
return base_queryset
query = Q()
for key, value in self.groups.items():
query |= Q(**{key: value})
return base_queryset.filter(query)
class PlanFilter(BaseFilter):
double_visit__or = django_filters.UUIDFilter("double_visit", method="OR")
visitor__or = django_filters.UUIDFilter("visitor", method="OR")
class Meta:
model = models.Plan
fields = {
"id": ["exact"],
"date": ["exact", "gte", "lte",],
"visitor": ["exact"],
"doctor": ["exact"],
"double_visit": ["exact"]
}
我相信我找到了一个更简单的方法:
from django.db.models.query_utils import Q
user_contacts = Contact.objects.order_by('-contact_date').filter(Q(sender_id=request.user.user_id)|Q(receiver_id=request.user.user_id))
就我而言,我想收集所有具有特殊sender_id
或receiver_id
的行。 而且,我希望它们在一个查询集中按date
排序
你好,
如何使用 OR 条件过滤多个字段!?
例如:
first_name = foo OR last_name = bar
相当于:
model.objects.filter(Q(first_name=foo) | Q(last_name=bar))
django.db.models 导入 Q
它对我有用。
最有用的评论
我做了类似以下的事情,我不确定是否适用于所有情况,但解决了我的问题: