Python 如何用slug代替id过滤对象
我有一个事件模型、序列化程序、视图集和一个标记模型、序列化程序、视图集。我想按标记和名称筛选事件。但只能通过标记id对其进行过滤 在标记序列化程序中,我在标记序列化程序中设置了Python 如何用slug代替id过滤对象,python,django,django-rest-framework,Python,Django,Django Rest Framework,我有一个事件模型、序列化程序、视图集和一个标记模型、序列化程序、视图集。我想按标记和名称筛选事件。但只能通过标记id对其进行过滤 在标记序列化程序中,我在标记序列化程序中设置了lookup\u字段。当I‘filter_field=(tags_uname)’时的选项不合适,因为lastGET参数更改了previous class Event(models.Model): tags = models.ManyToManyField('Tag') ... class Meta: or
lookup\u字段
。当I‘filter_field=(tags_uname)’时的选项不合适,因为lastGET
参数更改了previous
class Event(models.Model):
tags = models.ManyToManyField('Tag')
...
class Meta:
ordering = ['name']
def __str__(self):
return self.name
class Tag(models.Model):
name = models.CharField(unique=True, max_length=50)
def __str__(self):
return self.name
def __unicode__(self):
return '%s'% (self.name)
class EventSerializer(serializers.ModelSerializer):
from accounts.api.serializers import ShortUserSerializer
tags = serializers.SlugRelatedField(
many=True,
queryset=Tag.objects.all(),
slug_field='name'
)
members_count = serializers.SerializerMethodField()
author = ShortUserSerializer()
max_members = serializers.IntegerField(required=False, default=-1)
class Meta:
model = Event
fields = ['id', 'name', 'description', 'time_begins', 'author', 'members_count', 'max_members', 'tags',
'avatar', 'date_expire', 'city', 'country', 'geo']
...
class TagSerializer(serializers.ModelSerializer):
class Meta:
model = Tag
fields = '__all__'
lookup_field = 'name'
extra_kwargs = {
'url': {'lookup_field': 'name'}
}
...
class EventViewSet(viewsets.ModelViewSet):
queryset = Event.objects.all()
serializer_class = EventSerializer
http_method_names = ['get', 'patch']
filter_backends = (filters.SearchFilter, DjangoFilterBackend,)
search_fields = ('name', 'author__username', )
filter_fields = ('tags')
我收到的结果如下:
而且它确实有效
但我需要:
从
filter\u字段生成的默认过滤器集不考虑这种情况。对于对外关系,它使用了这个想法
因此,您必须像这样定义自定义过滤器集
class EventFilter(filters.FilterSet):
tags = filters.CharFilter(field_name="tags__name", method='filter_tags')
class Meta:
model = Event
fields = ['tags']
def filter_tags(self, queryset, name, tags):
return queryset.filter(tags__name__contains=tags.split(','))
然后您需要删除filter\u字段
,并将其添加为EventViewSet中的filter\u类
class EventViewSet(viewsets.ModelViewSet):
queryset = Event.objects.all()
serializer_class = EventSerializer
http_method_names = ['get', 'patch']
filter_backends = (filters.SearchFilter, DjangoFilterBackend,)
search_fields = ('name', 'author__username', )
filter_class = EventFilter
从filter\u字段生成的默认过滤器集不考虑这种情况。对于对外关系,它使用了这个想法
因此,您必须像这样定义自定义过滤器集
class EventFilter(filters.FilterSet):
tags = filters.CharFilter(field_name="tags__name", method='filter_tags')
class Meta:
model = Event
fields = ['tags']
def filter_tags(self, queryset, name, tags):
return queryset.filter(tags__name__contains=tags.split(','))
然后您需要删除filter\u字段
,并将其添加为EventViewSet中的filter\u类
class EventViewSet(viewsets.ModelViewSet):
queryset = Event.objects.all()
serializer_class = EventSerializer
http_method_names = ['get', 'patch']
filter_backends = (filters.SearchFilter, DjangoFilterBackend,)
search_fields = ('name', 'author__username', )
filter_class = EventFilter
如果您尝试像这样使用filterset\u fields=['tags\uu name',]
然后通过?tags\uuu name=name
访问,如果您尝试这样使用filterset\u字段=['tags\uu name',]
然后通过?tags\uu name=name
访问。请共享您模型的代码。我已更新了我的问题并添加了模型请共享您模型的代码。我已更新了我的问题并添加了模型。结果与“filter\u fields=['tags\uu name']”相同,正在按一个标记进行搜索only@StasMercer查看更新后的答案,了解如何使用多个标记进行过滤,这几乎是正确的,我将tag\uuuu contains更改为tag\uuuu name\uuuu in,解决了问题。请编辑您的答案,我将其标记为已解决。与“filter_fields=['tags__name']”相同的结果是按一个标记搜索only@StasMercer查看更新后的答案,了解如何使用多个标记进行过滤,这几乎是正确的,我将tag\uuuu contains更改为tag\uuuu name\uuuu in,解决了问题。请编辑您的答案,我会将其标记为已解决