day74-drfwork

models

from django.db import models

class Car(models.Model):
    COLOR_CHOICES = [
        (0, '银色'),
        (1, '黑色'),
        (2, '红色'),
        (3, '灰色')
    ]
    name = models.CharField(max_length=64)
    color = models.IntegerField(choices=COLOR_CHOICES,default=0)
    price = models.DecimalField(max_digits=10, decimal_places=2)
    image = models.ImageField(upload_to='img', default='img/default.jpg')
    brand = models.CharField(max_length=64)

    @property
    def car_color(self):
        return self.get_color_display()

exception

from rest_framework.views import exception_handler as drf_exception_handler
from rest_framework.response import Response
from rest_framework import status
def exception_handler(exc, context):
    response = drf_exception_handler(exc, context)
    detail = '%s - %s - %s' % (context.get('view'), context.get('request').method, exc)
    if not response:  # 服务端错误
        response =  Response({'detail': detail}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
    else:
        response.data = {'detail': detail}

    # 核心：要将response.data.get('detail')信息记录到日志文件
    # logger.waring(response.data.get('detail'))

    import sys
    sys.stderr.write('异常：%s\n' % response.data.get('detail'))

    return response

serializer

from rest_framework import serializers
from . import models


class CarModelSerializer(serializers.ModelSerializer):
    re_brand = serializers.CharField(write_only=True)

    class Meta:
        model = models.Car
        fields = ['name', 'price','color','car_color', 'image', 'brand', 're_brand']
        extra_kwargs = {
            'image':{
                'read_only':True
            },
            'color':{
                'write_only':True
            }
        }

    def validate(self, attrs):
        brand = attrs.get('brand')
        re_brand = attrs.pop('re_brand')
        if brand != re_brand:
            raise serializers.ValidationError({'re_brand':'品牌不一致'})
        return attrs

urls

from django.conf.urls import url
from . import views
urlpatterns = [
    url(r'^cars/$',views.CarAPIView.as_view()),
    url(r'^cars/(?P<pk>\d+)/$',views.CarAPIView.as_view()),
]

views

from django.shortcuts import render
from rest_framework.views import APIView
from rest_framework.response import Response
from. import models, serializers
class CarAPIView(APIView):
    def get(self, request, *args, **kwargs):
        pk = kwargs.get('pk')
        if pk:
            car_obj = models.Car.objects.filter(pk=pk).first()
            # 如果查询对象不存在，直接返回错误信息
            if not car_obj:
                return Response({
                    'status':1,
                    'msg':'pk error'
                },status=400)


            car_ser = serializers.CarModelSerializer(car_obj)
            return Response({
                'status':0,
                'msg':'ok',
                'results':car_ser.data
            })

        car_query = models.Car.objects.all()
        print(car_query)
        car_ser = serializers.CarModelSerializer(car_query,many=True)
        return Response({
            'status':0,
            'msg':'ok',
            'results':car_ser.data
        })

    def post(self, request, *args, **kwargs):
        # 子序列化
        car_ser = serializers.CarModelSerializer(data=request.data)

        car_ser.is_valid(raise_exception=True)
        car_obj=  car_ser.save()

        return Response({
            'status':0,
            'msg':'ok',
            'results':serializers.CarModelSerializer(car_obj).data
        })

来源：https://www.cnblogs.com/shenblog/p/12103846.html