day 72 作业

1.serializers

from rest_framework import serializers
from django.conf import settings
from . import models


class CarSerializers(serializers.ModelSerializer):

    re_brand = serializers.CharField(min_length=3, max_length=16, write_only=True)

    class Meta:
        model = models.CarAPI
        fields = ('name', 'price', 'poster', 'color', 'hue', 'icon', 'brand', 're_brand')
        extra_kwargs = {
            'name': {
                'min_length': 3,
                'max_length': 16,
                'error_messages': {
                    'min_length': '太短',
                    'max_length': '太长'
                }
            },
            'hue': {
                'read_only': True
            },
            'color': {
                'write_only': True
            },
            'icon': {
                'read_only': True
            },
            # 're_brand': {
            #     'write_only': True
            # }
        }

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

models

from django.db import models


# Create your models here.


class CarAPI(models.Model):
    color_choices = (
        (1, '银色'),
        (2, '黑色'),
        (3, '红色'),
        (4, '蓝色'),
        (5, '绿色'),
        (6, '黄色'),
    )
    name = models.CharField(max_length=32, verbose_name='名字')
    color = models.IntegerField(choices=color_choices, default=1, verbose_name='车身颜色')
    price = models.DecimalField(max_digits=10, decimal_places=2, verbose_name='售价')
    poster = models.ImageField(upload_to='img', null=True, blank=True, verbose_name='海报')
    brand = models.CharField(max_length=32, verbose_name='品牌')

    def hue(self):
        return self.get_color_display()

    def icon(self):
        from django.conf import settings
        return '%s%s%s' % (settings.BASE_URL, settings.MEDIA_URL, self.poster)

    class Meta:
        verbose_name_plural = '汽车表'

    def __str__(self):
        return self.name

views

from django.shortcuts import render
from api import models
from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework.renderers import JSONOpenAPIRenderer
from rest_framework.parsers import JSONParser, FormParser, MultiPartParser

from . import serializers


# Create your views here.


class BookApi(APIView):
    renderer_classes = [JSONOpenAPIRenderer, ]
    parser_classes = [JSONParser, FormParser, MultiPartParser]

    def get(self, request, *args, **kwargs):
        if kwargs:
            return Response({
                'status': 0,
                'msg': 'get ok',
                'results': [request.query_params, request.data]
            }, status=404)
        return Response({
            'status': 0,
            'msg': 'get ok'
        })

    def post(self, request, *args, **kwargs):
        if kwargs:
            return Response({
                'status': 0,
                'msg': 'post ok',
                'results': [request.query_params, request.data]
            })
        return Response({
            'status': 0,
            'msg': 'post ok',
            'results': [request.query_params, request.data]
        })


class CarApi(APIView):

    def get(self, request, *args, **kwargs):
        pk = kwargs.get('pk')
        if pk:
            car_dic = models.CarAPI.objects.filter(pk=pk).first()
            if not car_dic:
                return Response({
                    'status': 1,
                    'msg': 'pk error'
                }, status=404)
            car_ser = serializers.CarSerializers(car_dic, many=False)
            return Response({
                'status': 0,
                'msg': 'ok',
                'results': car_ser.data
            })
        else:
            car_list = models.CarAPI.objects.all()
            car_ser = serializers.CarSerializers(car_list, many=True)
            return Response({
                'status': 0,
                'msg': 'ok',
                'results': car_ser.data
            })

    def post(self, request, *args, **kwargs):
        car_ser = serializers.CarSerializers(data=request.data)
        if car_ser.is_valid():
            # print(car_ser.data)
            car_obj = car_ser.save()
            return Response({
                'status': 0,
                'msg': 'ok',
                'results': serializers.CarSerializers(car_obj).data
            })
        else:
            return Response({
                'status': 1,
                'msg': car_ser.errors
            })