Django-rest-framework 02（序列化器原理理解）

爱被打了一巴掌 2023-10-08 12:01 68阅读 0赞

#### Django-rest-framework 02 ####

*   *  1、创建一个新应用
     *  2、手动序列化器Serializer
     *   *  2.1、新建表Person
         *  2.2、视图
         *  2.3、路由
         *  2.4、新建serializers.py
         *  2.5、返回json类型数据
         *  2.6、测试
         *  2.7、多个数据序列化
     *  3、模型序列化器ModelSerializer
     *   *  3.1、新建表Student
         *  3.2、serializers.py
         *  3.3、测试

### 1、创建一个新应用 ###

新创建一个应用

python manage.py startapp RESTs

注册  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FfX2ludF9f_size_16_color_FFFFFF_t_70]

### 2、手动序列化器Serializer ###

#### 2.1、新建表Person ####

RESTs/models.py

from django.db import models
    
    
    class Person(models.Model):
        p_name = models.CharField(max_length=32)
        p_age = models.IntegerField(default=1)
        p_sex = models.BooleanField(default=False)

迁移

python manage.py makemigrations
    python manage.py migrate

#### 2.2、视图 ####

RESTs/views.py

from django.views import View
    
    
    class PersonView(View):
        def get(self, request):
            pass
    
        def post(self, request):
            pass

#### 2.3、路由 ####

untitled/urls.py

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FfX2ludF9f_size_16_color_FFFFFF_t_70 1]  
RESTs/urls.py  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FfX2ludF9f_size_16_color_FFFFFF_t_70 2]

#### 2.4、新建serializers.py ####

from RESTs.models import Person
    from rest_framework import serializers
    
    
    # 手动序列化器
    class PersonSerializer(serializers.Serializer):
        id = serializers.IntegerField(read_only=True)
        p_name = serializers.CharField(max_length=10)
        p_sex = serializers.BooleanField(default=False)
        p_age = serializers.IntegerField(default=1)
    
        def create(self, validated_data):
            return Person.objects.create(**validated_data)
    
        def update(self, instance, validated_data):
            instance.p_name = validated_data.get('p_name', instance.p_name)
            instance.p_age = validated_data.get('p_age', instance.p_age)
            instance.p_sex = validated_data.get('p_sex', instance.p_sex)
            instance.save()
    
            return instancez

手动测试序列化器

(REST) F:\python\yhpython\untitled>python manage.py shell
    Python 3.7.3 (v3.7.3:ef4ec6ed12, Mar 25 2019, 22:22:05) [MSC v.1916 64 bit (AMD64)] on win32
    Type "help", "copyright", "credits" or "license" for more information.
    (InteractiveConsole)
    >>> from RESTs.models import Person
    >>> person = Person()
    >>> person.p_name='suck'
    >>> person.p_age=6
    >>> person.save()
    >>> from RESTs.serializers import PersonSerializer
    >>> person_serializer = PersonSerializer(person)
    >>> person_serializer.data
    
    {
        'id': 2, 'p_name': 'suck', 'p_sex': False, 'p_age': 6}

#### 2.5、返回json类型数据 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FfX2ludF9f_size_16_color_FFFFFF_t_70 3]

#### 2.6、测试 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FfX2ludF9f_size_16_color_FFFFFF_t_70 4]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FfX2ludF9f_size_16_color_FFFFFF_t_70 5]

#### 2.7、多个数据序列化 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FfX2ludF9f_size_16_color_FFFFFF_t_70 6]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FfX2ludF9f_size_16_color_FFFFFF_t_70 7]

### 3、模型序列化器ModelSerializer ###

#### 3.1、新建表Student ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FfX2ludF9f_size_16_color_FFFFFF_t_70 8]  
迁移

python manage.py makemigrations
    python manage.py migrate

#### 3.2、serializers.py ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FfX2ludF9f_size_16_color_FFFFFF_t_70 9]  
视图  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FfX2ludF9f_size_16_color_FFFFFF_t_70 10]  
路由  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FfX2ludF9f_size_16_color_FFFFFF_t_70 11]

#### 3.3、测试 ####

运行  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FfX2ludF9f_size_16_color_FFFFFF_t_70 12]  
发起post  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FfX2ludF9f_size_16_color_FFFFFF_t_70 13]

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