过滤多对多关系thip

Posted 2021-04-13

我用rest-framwork作django 3制作api

我有一个具有多对多关系的模型。

然后，现在我想对多对多使用过滤器

在models.py中

class Text(models.Model):
    t_id = models.CharField(unique=True,null=False,max_length=20)
    t_text = models.TextField(null=True)
    issues = models.ManyToManyField(Issue) # It is many-to-many relationship
    pub_date = models.DateTimeField('date published')
    def __str__(self):    
        return self.t_id  

在serializer.py中

class TextFilter(filters.FilterSet):
    t_text = filters.CharFilter(lookup_expr='contains') # it works
    issues = filter.***Filter # How should I do here??

    class Meta:
        model = Text
        fields = ('t_text','issues')

答案

默认情况下ModelMultipleChoiceFilter用于ManyToManyField：

ModelMultipleChoiceFilter