Django REST framework 中的序列化器
from rest_framework.viewsets import ModelViewSet from .models import BookInfo
from .serializers import BookInfoSerializers class BookInfoViewSet(ModelViewSet):
queryset = BookInfo.objects.all() # 取序列化模型
serializer_class = BookInfoSerializers # 指定序列化的类
from django.conf.urls import url, include
from . import views from rest_framework.routers import DefaultRouter router = DefaultRouter()
router.register(r"books", views.BookInfoViewSet) urlpatterns = [
url(r'^index/$', views.index),
] urlpatterns += router.urls
http://127.0.0.1:8000/app001/books/
class BookInfo(models.Model):
btitle = models.CharField(max_length=20, verbose_name='名称')
bpub_date = models.DateField(verbose_name='发布日期')
bread = models.IntegerField(default=0, verbose_name='阅读量')
bcomment = models.IntegerField(default=0, verbose_name='评论量')
is_delete = models.BooleanField(default=False, verbose_name='逻辑删除') class Meta:
db_table = 'tb_books' # 指明数据库表名
verbose_name = '图书' # 在admin站点中显示的名称
verbose_name_plural = verbose_name # 显示的复数名称 def __str__(self):
return self.btitle
from rest_framework import serializers class BookInfoSerializers(serializers.Serializer):
""" 图书列表序列化器"""
id = serializers.IntegerField(label="ID", read_only=True)
btitle = serializers.CharField(label="名称", max_length=20)
bpub_date = serializers.DateField(label='发布日期', required=False)
bread = serializers.IntegerField(label='阅读量', required=False)
bcomment = serializers.IntegerField(label='评论量', required=False)
is_delete = serializers.BooleanField(label='逻辑删除', required=False)
# 查询图书的的对象 from app001.models import BookInfo book = BookInfo.objects.all()[0] # 构造序列化器
from app001.serializers import BookInfoSerializers serializer = BookInfoSerializers(book) # 获取序列化之后的属性
print(serializer.data)
# 打印效果:
"""
{'id': 1, 'bpub_date': '1980-05-01', 'btitle': '射雕英雄传', 'is_delete': False, 'bcomment': 34, 'bread': 12} """
class HeroInfo(models.Model):
GENDER_CHOICES = (
(0, 'male'),
(1, 'female')
)
hname = models.CharField(max_length=20, verbose_name='名称')
hgender = models.SmallIntegerField(choices=GENDER_CHOICES, default=0, verbose_name='性别')
hcomment = models.CharField(max_length=200, null=True, verbose_name='描述信息')
hbook = models.ForeignKey(BookInfo, on_delete=models.CASCADE, verbose_name='图书') # 外键
is_delete = models.BooleanField(default=False, verbose_name='逻辑删除') class Meta:
db_table = 'tb_heros'
verbose_name = '英雄'
verbose_name_plural = verbose_name def __str__(self):
return self.hname
from rest_framework import serializers class HeroInfoSerializers(serializers.Serializer):
"""英雄数据序列化器"""
GENDER_CHOICES = (
(0, 'male'),
(1, 'female')
)
# hname = models.CharField(max_length=20, verbose_name='名称')
id = serializers.IntegerField(label='ID', read_only=True)
# hgender = models.SmallIntegerField(choices=GENDER_CHOICES, default=0, verbose_name='性别')
hgender = serializers.ChoiceField(choices=GENDER_CHOICES, label='性别', required=False)
# hcomment = models.CharField(max_length=200, null=True, verbose_name='描述信息')
hcomment = serializers.CharField(label='描述信息', max_length=200, required=False, allow_null=True)
# hbook = models.ForeignKey(BookInfo, on_delete=models.CASCADE, verbose_name='图书') # 外键
hbook = serializers.PrimaryKeyRelatedField(label='图书', read_only=True)
# is_delete = models.BooleanField(default=False, verbose_name='逻辑删除')
from app001.models import HeroInfo hero = HeroInfo.objects.all()[0]
from app001.serializers import HeroInfoSerializers hs = HeroInfoSerializers(hero) print(hs.data)
from app001.models import BookInfo book = BookInfo.objects.all()[0] # 构造序列化器
from app001.serializers import BookInfoSerializers bs = BookInfoSerializers(book) # 获取序列化之后的属性
print(bs.data)
from app001.serializers import BookInfoSerializers
data = {'bpub_date': 123}
serializer = BookInfoSerializers(data=data)
serializer.is_valid()
serializer.errors
serializer.validated_data
from app001.serializers import BookInfoSerializers
data = {'bpub_date': "1993-12-27", 'btitle': 'python'}
serializer = BookInfoSerializers(data=data)
serializer.is_valid()
serializer.errors
serializer.validated_data
from rest_framework import serializers class BookInfoSerializers(serializers.Serializer):
""" 图书列表序列化器"""
id = serializers.IntegerField(label="ID", read_only=True)
btitle = serializers.CharField(label="名称", max_length=20)
bpub_date = serializers.DateField(label='发布日期', required=False)
bread = serializers.IntegerField(label='阅读量', required=False)
bcomment = serializers.IntegerField(label='评论量', required=False)
is_delete = serializers.BooleanField(label='逻辑删除', required=False)
heroinfo_set = serializers.PrimaryKeyRelatedField(read_only=True, many=True) # 新增 def validate_btitle(self, value):
if 'django' not in value.lower():
raise serializers.ValidationError("图书不是关于Django的")
return value
from rest_framework import serializers def about_django(value):
if 'django' not in value.lower():
raise serializers.ValidationError("about_django中抛出图书不是关于Django的") class BookInfoSerializers(serializers.Serializer):
""" 图书列表序列化器"""
id = serializers.IntegerField(label="ID", read_only=True)
btitle = serializers.CharField(label="名称", max_length=20,validators=[about_django])
bpub_date = serializers.DateField(label='发布日期', required=False)
bread = serializers.IntegerField(label='阅读量', required=False)
bcomment = serializers.IntegerField(label='评论量', required=False)
is_delete = serializers.BooleanField(label='逻辑删除', required=False)
heroinfo_set = serializers.PrimaryKeyRelatedField(read_only=True, many=True) # 新增 def validate(self, attrs):
bread = attrs['bread']
bcomment = attrs['bcomment']
if bread < bcomment:
raise serializers.ValidationError('阅读量小于评论量')
return attrs
>>> from app001.serializers import BookInfoSerializers
>>> data = {'bcomment': 34, 'bread': 12,'bpub_date': "1993-12-27", 'btitle': 'python_django'}
>>> serializer = BookInfoSerializers(data=data)
>>> serializer.is_valid()
False
>>> serializer.errors
{'non_field_errors': [ErrorDetail(string='阅读量小于评论量', code='invalid')]}
>>> serializer.validated_data
{}
>>> from app001.serializers import BookInfoSerializers
>>> data = {'bcomment': 14, 'bread': 12,'bpub_date': "1993-12-27", 'btitle': 'ptython'}
>>> serializer = BookInfoSerializers(data=data)
>>> serializer.is_valid()
False
>>> serializer.errors
{'btitle': [ErrorDetail(string='about_django中抛出图书不是关于Django的', code='invalid')]}
>>> serializer.validated_data
{}
>>>
from rest_framework import serializers class BookInfoSerializers(serializers.Serializer):
""" 图书列表序列化器"""
id = serializers.IntegerField(label="ID", read_only=True)
btitle = serializers.CharField(label="名称", max_length=20,validators=[about_django])
bpub_date = serializers.DateField(label='发布日期', required=False)
bread = serializers.IntegerField(label='阅读量', required=False)
bcomment = serializers.IntegerField(label='评论量', required=False)
is_delete = serializers.BooleanField(label='逻辑删除', required=False)
heroinfo_set = serializers.PrimaryKeyRelatedField(read_only=True, many=True) # 新增 def validate_btitle(self, value):
if 'django' not in value.lower():
raise serializers.ValidationError("图书不是关于Django的")
return value
>>> from app001.serializers import BookInfoSerializers
>>> data = {'bcomment': 10, 'bread': 12,'bpub_date': "1993-12-27", 'btitle': 'python_django'}
>>> serializer = BookInfoSerializers(data=data)
>>> serializer.is_valid()
True
>>> serializer.errors
{}
>>> serializer.validated_data
OrderedDict([('btitle', 'python_django'), ('bpub_date', datetime.date(1993, 12, 27)), ('bread', 12), ('bcomment', 10)])
>>>
>>> from app001.serializers import BookInfoSerializers
>>> data = {'bcomment': 10, 'bread': 12,'bpub_date': "1993-12-27", 'btitle': 'ptython'}
>>> serializer = BookInfoSerializers(data=data)
>>> serializer.is_valid()
False
>>> serializer.errors
{'btitle': [ErrorDetail(string='图书不是关于Django的', code='invalid')]}
>>> serializer.validated_data
{}
from rest_framework import serializers def about_django(value):
if 'django' not in value.lower():
raise serializers.ValidationError("图书不是关于Django的") class BookInfoSerializers(serializers.Serializer):
""" 图书列表序列化器"""
id = serializers.IntegerField(label="ID", read_only=True)
btitle = serializers.CharField(label="名称", max_length=20,validators=[about_django])
bpub_date = serializers.DateField(label='发布日期', required=False)
bread = serializers.IntegerField(label='阅读量', required=False)
bcomment = serializers.IntegerField(label='评论量', required=False)
is_delete = serializers.BooleanField(label='逻辑删除', required=False)
heroinfo_set = serializers.PrimaryKeyRelatedField(read_only=True, many=True) # 新增 def validate_btitle(self, value):
if 'django' not in value.lower():
raise serializers.ValidationError("图书不是关于Django的")
return value def validate(self, attrs):
bread = attrs['bread']
bcomment = attrs['bcomment']
if bread < bcomment:
raise serializers.ValidationError('阅读量小于评论量')
return attrs
>>> from app001.serializers import BookInfoSerializers
>>> data = {'bcomment': 10, 'bread': 12,'bpub_date': "1993-12-27", 'btitle': 'ptython_django'}
>>> serializer = BookInfoSerializers(data=data)
>>> serializer.is_valid()
True
>>> serializer.errors
{}
>>> serializer.validated_data
OrderedDict([('btitle', 'ptython_django'), ('bpub_date', datetime.date(1993, 12, 27)), ('bread', 12), ('bcomment', 10)])
>>> from app001.serializers import BookInfoSerializers
>>> data = {'bcomment': 10, 'bread': 12,'bpub_date': "1993-12-27", 'btitle': 'ptython'}
>>> serializer = BookInfoSerializers(data=data)
>>> serializer.is_valid()
False
>>> serializer.errors
{'btitle': [ErrorDetail(string='about_django中抛出图书不是关于Django的', code='invalid')]}
>>> serializer.validated_data
{}
from rest_framework.validators import UniqueValidator slug = SlugField(
max_length=100,
validators=[UniqueValidator(queryset=BlogPost.objects.all())]
)
from rest_framework.validators import UniqueTogetherValidator class ExampleSerializer(serializers.Serializer):
# ...
class Meta:
validators = [
UniqueTogetherValidator(
queryset=ToDoItem.objects.all(),
fields=('list', 'position')
)
]
>>> from app001.serializers import BookInfoSerializers
>>> data = {'btitle': '封神演义'}
>>> serializer = BookInfoSerializers(data=data)
>>> serializer.is_valid()
False
>>> serializer.save()
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/home/python/.virtualenvs/djf/lib/python3.5/site-packages/rest_framework/serializers.py", line 184, in save
'You cannot call `.save()` on a serializer with invalid data.'
AssertionError: You cannot call `.save()` on a serializer with invalid data.
>>> from app001.serializers import BookInfoSerializers
>>> data = {'bcomment': 10, 'bread': 12,'bpub_date': "1993-12-27", 'btitle': 'ptython_django'}
>>> serializer = BookInfoSerializers(data=data)
>>> serializer.is_valid()
True
>>> serializer.save()
<BookInfo: ptython_django>
from rest_framework import serializers def about_django(value):
if 'django' not in value.lower():
raise serializers.ValidationError("about_django中抛出图书不是关于Django的") class BookInfoSerializers(serializers.Serializer):
""" 图书列表序列化器"""
id = serializers.IntegerField(label="ID", read_only=True)
btitle = serializers.CharField(label="名称", max_length=20, validators=[about_django])
bpub_date = serializers.DateField(label='发布日期', required=False)
bread = serializers.IntegerField(label='阅读量', required=False)
bcomment = serializers.IntegerField(label='评论量', required=False)
is_delete = serializers.BooleanField(label='逻辑删除', required=False)
heroinfo_set = serializers.PrimaryKeyRelatedField(read_only=True, many=True) # 新增 def validate_btitle(self, value):
if 'django' not in value.lower():
raise serializers.ValidationError("图书不是关于Django的")
return value def create(self, validated_data):
"""新建"""
return BookInfo.objects.create(**validated_data) def update(self, instance, validated_data):
"""更新,instance为要更新的对象实例"""
instance.btitle = validated_data.get('btitle', instance.btitle)
instance.bpub_date = validated_data.get('bpub_date', instance.bpub_date)
instance.bread = validated_data.get('bread', instance.bread)
instance.bcomment = validated_data.get('bcomment', instance.bcomment)
instance.save()
return instance
>>> from app001.serializers import BookInfoSerializers
>>> # from app001.models import BookInfo
>>> # book = BookInfo.objects.filter(btitle="ptython_django")[0]
>>> book = BookInfo.objects.get(id=10)
>>> data = {'bcomment': 10, 'bread': 12,'bpub_date': "1994-12-27", 'btitle': 'ptython_django'}
>>> # data = {'bpub_date': "1994-12-27",'bcomment': 10, 'bread': 12,}
>>> serializer = BookInfoSerializers(book, data=data)
>>> serializer.is_valid()
True
>>> serializer.save()
<BookInfo: ptython_django>
>>> book.btitle
'ptython_django'
>>>
>>> from app001.serializers import BookInfoSerializers
>>> from app001.models import BookInfo
>>> book = BookInfo.objects.filter(btitle="ptython_django")[0]
>>> data = {'bcomment': 10, 'bread': 12,'bpub_date': "1995-12-27", 'btitle': 'ptython_django'}
>>> serializer = BookInfoSerializers(book, data=data)
>>> serializer.is_valid()
True
>>> serializer.save()
<BookInfo: ptython_django>
>>> book.btitle
'ptython_django'
>>> book.bpub_date
datetime.date(1995, 12, 27)
>>> from app001.serializers import BookInfoSerializers
>>> from app001.models import BookInfo
>>> book = BookInfo.objects.filter(btitle="ptython_django")[0]
>>> data = {'bpub_date': "1996-12-27", 'btitle': 'ptython_django'}
>>> serializer = BookInfoSerializers(book, data=data)
>>> serializer.is_valid()
True
>>> serializer.save()
<BookInfo: ptython_django>
>>> book.btitle
'ptython_django'
>>> book.bpub_date
datetime.date(1996, 12, 27)
Django REST framework 中的序列化器的更多相关文章
- DRF中的序列化器
DRF中的序列化器详细应用 视图的功能:说白了就是接收前端请求,进行数据处理 (这里的处理包括:如果前端是GET请求,则构造查询集,将结果返回,这个过程为序列化:如果前端是POST请求,假如要对数 ...
- Python的Django REST框架中的序列化及请求和返回
Python的Django REST框架中的序列化及请求和返回 序列化Serialization 1. 设置一个新的环境 在我们开始之前, 我们首先使用virtualenv要创建一个新的虚拟环境,以使 ...
- Django REST framework 中文文档
Django REST framework介绍 现在前后端分离的架构设计越来越流行,业界甚至出现了API优先的趋势. 显然API开发已经成为后端程序员的必备技能了,那作为Python程序员特别是把Dj ...
- Django REST framework 中的视图
1.Request REST framework传入视图的request对象不再是Django默认的Httprequest对象,而是DRF提供的扩展类的Request类的对象 常用属性 request ...
- DRF (Django REST framework) 中的视图类
视图说明 1. 两个基类 1)APIView rest_framework.views.APIView APIView是REST framework提供的所有视图的基类,继承自Django的View父 ...
- DRF (Django REST framework) 中的Request 与 Response
DRF中的Request 与 Response 1. Request - REST framework 传入视图的request对象不再是Django默认的HttpRequest对象,而是REST f ...
- 在django restful framework中设置django model的property
众所周知,在django的model中,可以某些字段设置@property和setter deleter getter,这样就可以在存入数据的时候进行一些操作,具体原理请参见廖雪峰大神的博客https ...
- Django:(08)序列化器
1.序列化和反序列化变量从内存中变成可存储或传输的过程称之为序列化,序列化之后,就可以把序列化后的内容写入磁盘,或者通过网络传输到别的机器上.反过来,把变量内容从序列化的对象重新读到内存里称之为反序列 ...
- Django REST framework中的版本控制
1.REST framework版本控制的流程分析 1.1 determine_version方法的执行流程 首先,请求到达REST framework的CBV,执行CBV中的dispatch方法再次 ...
随机推荐
- 前后台交互经常使用的技术汇总(后台:Java技术,前台:Js或者Jquery)
1:由于针对特定的前后台交互用到的知识总结,所以不大量贴代码,主要给出思路,方便自己以后脑补和技术总结,当然也希望可以帮助到别人. 后台Json和其他格式转化,之前总结过Json和对象,集合,字符串的 ...
- Centos7安装OpenJDK8
https://blog.csdn.net/kanbe_kotori/article/details/70948430
- java.lang.OutOfMemoryError: unable to create new native thread
ps -o nlwp 70753 sudo -u tomcat jmap -dump:format=b,file=fundmarketmanage.hprof 78894
- CDOJ1927 爱吃瓜的伊卡洛斯(2) 【并查集】启发式合并+set
伊卡洛斯很爱吃西瓜.一次,他来到一个西瓜摊旁,发现水果摊有N个西瓜,西瓜有红色.黄色.绿色.蓝色……等等数不清的颜色. 伊卡洛斯很想知道知道一些信息,便于老板交谈了起来. 当老板的话的第一个字符为”A ...
- java数组知识点总结
数组是一个用来存储同一个数据类型多个元素的一个容器(数组长度是固定的,数组中存储的元素的数据类型要求一致) 1.格式: 格式1: 数据类型[] 数组名 = new 数据类型[数组长度]; 格式2: 数 ...
- alpha冲刺8/10
目录 摘要 团队部分 个人部分 摘要 队名:小白吃 组长博客:hjj 作业博客:冲刺倒计时之8 团队部分 后敬甲(组长) 过去两天完成了哪些任务 首页重新设计 课程时间线确定 答辩准备 接下来的计划 ...
- input标签checkbox选中触发事件的方法
1.方法一 <input type="checkbox" onclick="checkboxOnclick(this)" /> <script ...
- Codeforces 1076F Summer Practice Report dp
Summer Practice Report dp[ i ][ 0 ]表示放完前 i 页, 第 i 页最后一段是 0, 0个数的最小值. dp[ i ][ 1 ]表示放完前 i 页, 第 i 页最后一 ...
- 51Nod1039 N^3 Mod P 数论 原根 BSGS
原文链接https://www.cnblogs.com/zhouzhendong/p/51Nod1039.html 题目传送门 - 51Nod1039 题意 题解 这题我用求高次剩余的做法,要卡常数. ...
- LoadRunner服务水平协议SLA
服务水平协议 (或称 SLA)是以插入的事务为设置对象来为负载测试场景定义的具体目标. Analysis 将这些目标与 LoadRunner在运行过程中收集和存储的性能相关数据进行比较,然后确定目标的 ...