0905 self-summary

drf frame serializers in class ModelSerializer

基于seriallizer类进行简化

https://www.cnblogs.com/pythonywy/p/11455508.html

A simple to use

Importingfrom rest_framework import serializers

与基础serializer类后续使用的作用相似

class 自定义名称(serializers.ModelSerializer):
    class Meta:
        model=对应的模型
        fields=('参与序列化和反序列的字段1','参与序列化和反序列的字段2')
        #fields='__all__'  为所有字段
        # exclude = ('id', 'is_delete')  # 刨除某些字段
        # depth = 1  # 跨表自动深度（展示外键表的所有字段）

important point

Wherein fieldsand excludecan not coexist
depthCan not control the display field associated with the foreign key table will show all of them

II. Guidance dictionary using the method of generating a model class

For example, two models Awith Btheir c has a foreign key field

modles.py

class B(models.Model):
    name = models.CharField(max_length=60)
    
class A(models.Model):
    uid = models.ForeignKey(B,'id')
    
    @property    #下面调用函数名的时候自动运行函数
    def b_name(self):  #这里的self是A类
        return self.uid.name
        
class AModelSerializer(serializers.ModelSerializer):
        class Meta:
            model=A   #这里导入A会把A里面的所有名称空间存在的都进行导入
            fields=('b_name')

III. In addition the overall method completes depth inquiry

class B(models.Model):
    name = models.CharField(max_length=60)
    
class A(models.Model):
    uid = models.ForeignKey(B,'id')

#方法一
class BModelSerializer(serializers.ModelSerializer):
        class Meta:
            model=B   
            fields=('b_name')
 
class BModelSerializer(serializers.ModelSerializer):
        b_name = BModelSerializer()
        class Meta:
            model=A   #这里导入A会把A里面的所有名称空间存在的都进行导入
            fields=('b_name')
            
#方法二
#通过自定义字段
class BModelSerializer(serializers.ModelSerializer):
          b_name = serializers.SerializerMethodField()
          def get_b_name(self, obj: models.A):
               return A.uid.name
        class Meta:
            model=A   #这里导入A会把A里面的所有名称空间存在的都进行导入
            fields=('b_name')

Four .ModelSerializer for de-serialization words about the condition number of settings and read-only write-only attribute set

反序列话约数条件设置

class 自定义名称(serializers.ModelSerializer):
    class Meta:
        model=对应的模型
        fields=('参与序列化和反序列的字段1','参与序列化和反序列的字段2')
        extra_kwargs ={
            参与序列化和反序列的字段1:{
                'required': True,  #必须填写的字段
                 'min_length': 3,
                #.....约数条件
                'error_messages': {
                    'min_length': '太短'
                   
                }
            }
        }

只读只写属性设置

class 自定义名称(serializers.ModelSerializer):
    class Meta:
        model=对应的模型
        fields=('参与序列化和反序列的字段1','参与序列化和反序列的字段2')
        extra_kwargs ={
            参与序列化和反序列的字段1:{
                 'write_only': True #只写
            }
            参与序列化和反序列的字段2:{
                 'read_only': True #只读
            }
        }

V. view layer uses

数据没有修改

class BookAPIView(APIView):    
    def get(self, request, *args, **kwargs):
        book_query = models.Book.objects.all()  #假设查我们定义的书的这个模型
        book_ser = serializers.BookModelSerializer(book_query, many=True)
        return Response(0, 'ok', results=book_ser.data) #用drf框架自带的Response

有添加修改相关操作

class BookAPIView(APIView):    
    def post(self, request, *args, **kwargs):
        book_ser = serializers.BookModelSerializer(data=request.data) #根据传进来的数据机芯判断
        #如果多个数据为book_set = serializers.BookModelSerializer(data=request.data many=true)
        if book_ser.is_valid():  #这里是我们设置的ModelSerializer的约数条件看是否能通过
            book_ser.save()  #这里他会自动进行判断是create方法还是update方法
            return Response(0, 'ok',results=book_ser.data)
        else:
            return Response(1, '添加失败', results=book_ser.errors)#用drf框架自带的Response

有关删除

class BookAPIView(APIView):    
    def post(self, request, *args, **kwargs):
        book_ser = serializers.BookModelSerializer(data=request.data) #根据传进来的数据机芯判断
        #如果多个数据为book_set = serializers.BookModelSerializer(data=request.data many=true)
        if book_ser.is_valid():  #这里是我们设置的ModelSerializer的约数条件看是否能通过
            book_ser.deleter()  #这里他会自动进行判断是create方法还是update方法
            return Response(0, 'ok',results=book_ser.data)
        else:
            return Response(1, '删除失败', results=book_ser.errors)#用drf框架自带的Response

ModelSerializer class simplified sequence and deserialization frame serializers in drf