自定制serilazry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()