在 django rest 序列化程序中使用 django mptt 包时如何获取父节点名称？

问题描述

我只使用此代码获取父 ID，但我需要父节点名称。是否可以获取父节点名称？

class Department(MPTTModel,NameStatusModelMixin):
    desc = models.TextField(blank=True,null=True,default=None)
    slug = models.SlugField(max_length=100,blank=True)
    parent = TreeForeignKey('self',on_delete=models.CASCADE,blank=True,related_name='children')
    related_positions = models.ManyToManyField('Position',related_name='departments')
    
    
    class MPTTMeta:
        order_insertion_by = ['id']
 

    def __str__(self):
        return self.name

class DepartmentDetailSerializer(ModelSerializer):
    
    class Meta:
        model = Department
        fields = ('id','name','status','slug','desc','parent')

解决方法

最简单的方法是：

class ParentSerializer(ModelSerializer):
    class Meta:
        model = Department
        fields = ('name')

class DepartmentDetailSerializer(ModelSerializer):

    parent = ParentSerializer()
    
    class Meta:
        model = Department
        fields = ('id','name','status','slug','desc','parent')

您还可以考虑使用 SerializerMethodField 或 recursive/self-referential serializer，具体取决于您的确切需求/您希望最终数据的样子...