1 数据库model
class menu(models.Model):
    menuId=models.BigAutoField(primary_key=True)
    menuCode = models.CharField(max_length=16,default='', verbose_name='菜单code')
    menuName = models.CharField(max_length=50,verbose_name='菜单',blank=True, null=True)
    parentMenuCode = models.CharField(max_length=20,verbose_name='父菜单',blank=True, null=True)
    path = models.CharField(max_length=20,verbose_name='菜单路径',blank=True, null=True)
    icon = models.CharField(max_length=20,verbose_name='菜单图标',blank=True, null=True)
    roles = models.CharField(max_length=500,verbose_name='角色',blank=True, null=True)
    isDelete = models.BooleanField(default=0,verbose_name='1删除')

class menu_operation(models.Model):
    menu = models.ForeignKey(menu, on_delete=models.CASCADE, related_name='menuOper',blank=True, null=True, verbose_name='菜单')
    operName = models.CharField(max_length=50,verbose_name='操作名称',blank=True, null=True)
    roles = models.CharField(max_length=500,verbose_name='角色',blank=True, null=True)
    isDelete = models.BooleanField(default=0,verbose_name='1删除')

2 序列化类

正向查询关联外键的名称

class MenuOperationSerializer(serializers.ModelSerializer):
    # source 格式模型外键模型字段名.主表的字段属性
    menu=serializers.CharField(source="menu.menuName",read_only=True)
    class Meta:
        model = models.menu_operation
        fields = '__all__'
反向查询关联的外键对象列表
class MenuSerializer(serializers.ModelSerializer):
    #注意顺序，需在字表的后边定义该序列化,
    #属性与子表的related_name对应
    menuOper = MenuOperationSerializer(many=True)
    class Meta:
        model = models.menu
        fields = '__all__'

3 查询（和普通查询一致）

class MenuViewSet(viewsets.GenericViewSet):
    serializer_class = serializer.MenuSerializer
    authentication_classes=[JwtAuthentication]
    def findAllMenu(self, request):
        instance=menu.objects.filter(isDelete=0)
        serializer = self.get_serializer(instance, many=True)
        return APIResponse(data=serializer.data)