自定制serilazry字段

在获取序列化返回值时候想要有时候我们需要生成我们需要的关联字段

class CourseSerializers(ModelSerializer):

    # 对于外键，one to one  , choice 可以用这种source方式
    course_type =serializers.CharField(source='get_course_type_display')
    class Meta:
        model = Course
        fields = ['id','name','course_type']
        # fields = '__all__'

class CourseDetaileSerializers(HyperlinkedModelSerializer):
    # teachers = HyperlinkedRelatedField(many=True,view_name='teacher-detaile',read_only=True)
    # 对于多对多复杂字段，或者外键取多个字段
    prices = SerializerMethodField()
    question = SerializerMethodField()
    course_detail = SerializerMethodField()
    teachers = SerializerMethodField()
    recommend_courses = SerializerMethodField()
    course_chapter= SerializerMethodField()
    comment = SerializerMethodField()