Django——rest序列化（自定义serializers）

爱被打了一巴掌 2022-05-23 22:41 187阅读 0赞

from django.shortcuts import render
    from rest_framework.views import APIView
    from rest_framework.response import Response
    from repository import models
    from rest_framework import serializers
    
    class MyField(serializers.CharField):
        #返回数据到to_respresentation
        def get_attribute(self, instance):
            teacher_list = instance.teachers.all()
            return teacher_list
        #格式化数据
        def to_representation(self, value):
            ret = []
            for row in value:
                ret.append({
       'id': row.id,'name':row.name})
            return ret
    
    
    class TestSerializer(serializers.ModelSerializer):
        # get_attribute, 去数据库中获取值
        # to_representation，在页面中显示值
        # level_name = serializers.CharField(source='get_level_display') # obj.get_level_display
        # test_char= serializers.CharField(source='xx.xx.xx') # 以.的形式跨表
        x1 = serializers.SerializerMethodField()
        xx = MyField()
        class Meta:
            model = models.Course
            fields = ['name','level_name']
    
        def get_x1(self,obj):
            pass

在ModelSerializer直接以get\_字段的形式

class CouserDetailSerializer(serializers.ModelSerializer):
        course_name = serializers.CharField(source='course.name')
        recommend_courses_list = serializers.SerializerMethodField()
        price_policy_list = serializers.SerializerMethodField()
    
        class Meta:
            model = models.CourseDetail
            fields = ['id','course_name','recommend_courses_list']
    
        def get_recommend_courses_list(self,obj):
            ret = []
            course_list = obj.recommend_courses.all()
            for item in course_list:
                ret.append({
       'id':item.id,'name':item.name})
            return ret
    
        def get_price_policy_list(self,obj):
            # 当前课程所有的价格策略
            # ret = []
            # price_policy_list = obj.course.price_policy.all()
            # return ret
    
            # ret = []
            # price_policy_list = models.PricePolicy.objects.filter(content_type__app_label='repository',
            # content_type__model='course',
            # object_id=obj.couser_id)
            # return ret
            return "ssss"

作者：lkning  
链接：[https://www.jianshu.com/p/f23fd7a3abe5][https_www.jianshu.com_p_f23fd7a3abe5]  
來源：简书  
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[https_www.jianshu.com_p_f23fd7a3abe5]: https://www.jianshu.com/p/f23fd7a3abe5