django rest framework 学习笔记-实战商城3

 01用户模块模型定义_哔哩哔哩_bilibili  本博客借鉴至大佬的视频学习笔记

用户模块及商品数据表结构设计

from ckeditor.fields import RichTextField  # pip install django-ckeditor
from django.db import models# Create your models here.
# from wx.richtext import RichTextFieldfrom common.db import BaseModelclass GoodsGroup(BaseModel):"""商品分类"""name = models.CharField(verbose_name="分类名称", help_text="分类名称", max_length=15,blank=True,null=True)image = models.CharField(verbose_name="图片链接", help_text="图片链接", max_length=200, blank=True, null=True)status = models.BooleanField(verbose_name="是否启用", help_text="是否启用", default=False,blank=True,null=True)class Meta:db_table = 'goods_group'verbose_name = "商品分类表"verbose_name_plural = verbose_namedef __str__(self):return self.nameclass Goods(BaseModel):"""商品"""group = models.ForeignKey('GoodsGroup', verbose_name="分类", help_text="分类", max_length=15, on_delete=models.CASCADE)image = models.CharField(verbose_name="图片链接", help_text="图片链接", max_length=200, blank=True, null=True)title = models.CharField(verbose_name="标题", help_text="标题", max_length=20, blank=True,null=True)desc = models.CharField(verbose_name="商品描述", help_text="商品描述", max_length=200, blank=True,null=True)price = models.DecimalField(verbose_name="商品价格", help_text="商品价格", max_digits=10, decimal_places=2, blank=True,null=True)cover = models.ImageField(verbose_name="封面图链接", help_text="封面图链接", max_length=200, blank=True,null=True)stock = models.IntegerField(verbose_name="库存", help_text="库存", blank=True, null=True, default=1)sales = models.IntegerField(verbose_name="销量", help_text="销量", blank=True, null=True, default=0)is_on = models.BooleanField(verbose_name="是否上架", help_text="是否上架", blank=True, null=True, default=False)recommend = models.BooleanField(verbose_name="是否推荐", help_text="是否推荐", blank=True, null=True, default=False)class Meta:db_table = 'goods'verbose_name = '商品表'verbose_name_plural = verbose_namedef __str__(self):return self.titleclass Detail(BaseModel):"""商品详情"""goods = models.OneToOneField('Goods', verbose_name="商品", on_delete=models.CASCADE, max_length=200)producer = models.CharField(verbose_name='厂商', help_text='厂商', max_length=200, blank=True,null=True)norms = models.CharField(verbose_name='规格', help_text='规格', max_length=200, blank=True,null=True)details = RichTextField(verbose_name='商品详情', help_text='商品详情', max_length=200,blank=True,null=True)class Meta:db_table = 'details'verbose_name = '详情'verbose_name_plural = verbose_namedef __str__(self):return self.goodsclass GoodsBanner(BaseModel):"""商品轮播图"""title = models.CharField(verbose_name='轮播图名称', help_text='轮播图名称', max_length=20, blank=True)image = models.ImageField(verbose_name='轮播图链接', help_text='轮播图链接', max_length=200, blank=True)# url = models.CharField(verbose_name='跳转的地址',help_text='跳转的地址',max_length=200,blank=True)status = models.BooleanField(verbose_name='是否启用', help_text='是否启用', default=False,blank=True,null=True)seq = models.IntegerField(verbose_name='顺序', help_text='顺序', default=1, blank=True,null=True)class Meta:db_table = 'banner'verbose_name = '首页商品轮播'verbose_name_plural = verbose_namedef __str__(self):return self.titleclass Collect(models.Model):"""商品收藏"""user = models.ForeignKey('users.User', help_text='用户ID', verbose_name='用户ID', on_delete=models.CASCADE,blank=True,null=True)goods = models.ForeignKey('goods.Goods', help_text="商品ID", verbose_name="商品ID", on_delete=models.CASCADE,blank=True,null=True)class Meta:db_table = 'collect'verbose_name = "收藏商品"verbose_name_plural = verbose_namedef __str__(self):return self.goods

Django自带admin配置

from django.contrib import admin
from .models import GoodsGroup,Goods,Detail,GoodsBanner,Collect
# Register your models [e-mail](GoodsGroup)
class GoodsGroupAdmin(admin.ModelAdmin):list_display = ['name','status']@admin.register(Goods)
class GoodsAdmin(admin.ModelAdmin):list_display = ['title','group','price','stock','sales','is_on']@admin.register(Detail)
class DetailGroupAdmin(admin.ModelAdmin):list_display = ['goods', 'producer','norms']@admin.register(GoodsBanner)
class GoodsBannerAdmin(admin.ModelAdmin):list_display = ['title', 'status']@admin.register(Collect)
class CollectAdmin(admin.ModelAdmin):list_display = ['user', 'goods']

商品首页接口实现

class IndexView(APIView):"""首页数据展示"""def get(self,request):"""返回轮播图、商品分类"""group = GoodsGroup.objects.filter(status=True)groupSer =GoodsGroupSerializer(group,many=True)# 轮播图banner = GoodsBanner.objects.filter(status=True)bannerSer = GoodsBannerSerializer(banner,many=True)# 推荐的商品goods = Goods.objects.filter(recommend=True)goodsSer = GoodsSerializer(goods,many=True)# 返回数据result = {'banner': bannerSer.data,'goods':goodsSer.data,'group':groupSer.data}return Response({"message":'ok','data':result},status=status.HTTP_200_OK)# 商品首页
path('index/', IndexView.as_view()),

商品列表获取和分类排序接口

# view
class GoodsView(ReadOnlyModelViewSet):""""商品列表接口"""serializer_class = GoodsSerializer# 选择上架的商品queryset = Goods.objects.filter(is_on=True),# 实现商品分类和推荐类过滤filterset_fields = ('group','recommend')# 通过价格和销量排序ordering_fields =('sales','price','create_time')# url
# 商品列表接口
path('goods/', GoodsView.as_view({"get":'list'})),
# 单个商品获取
path('goods/<int:pk>/', GoodsView.as_view({"get":'retrieve'})),# setting
# 过滤器信息配置、排序器配置
'DEFAULT_FILTER_BACKENDS':['django_filters.rest_framework.DjangoFilterBackend','rest_framework.filters.OrderingFilter']# 注册
'django_filters',

商品的收藏与取消收藏接口

# view
class CollectView(mixins.RetrieveModelMixin,mixins.CreateModelMixin,mixins.ListModelMixin,mixins.DestroyModelMixin,GenericViewSet):"""商品收藏与取消create: 收藏delete: 取消list: 收藏列表"""queryset = Collect.objects.all()serializer_class = CollectSerializerpermission_classes =  [IsAuthenticated,CollectPermissions]filterset_fields = ("user",)def create(self, request, *args, **kwargs):# 获取请求参数user = request.userparams_user_id = request.data.get('user')# 检验请求参数中的id是否当前登录的用户IDif user.id != params_user_id:return Response({'error':'你没有用户权限访问该信息'},status=status.HTTP_400_BAD_REQUEST)return super().create(request, *args, **kwargs)def list(self, request, *args, **kwargs):"""商品收藏列表"""queryset = self.filter_queryset(self.get_queryset())queryset = queryset.filter(user=request.user)serializer = self.get_serializer(queryset, many=True)return Response(serializer.data)# perssion
from rest_framework import permissions
class CollectPermissions(permissions.BasePermission):"""Custom permission to only allow owners of an object to edit it."""def has_object_permission(self, request, view, obj):# 判断是否是管理员if request.user.is_superuser:return True# 判断当前的用户对象和登录的用户对象是否是同一个，防止越权return obj == request.user# url
# 收藏商品
path('collect/', CollectView.as_view({"post":'create','get':'list'})),
# 取消收藏
path('collect/del/<int:pk>/', CollectView.as_view({"delete":'destroy'})),

商品购物车的接口实现： 购物车添加数量、修改商品购物车状态、加购商品

# serializer
from rest_framework import serializers
from apps.cart.models import Cart
from apps.goods.serializers import GoodsSerializerclass CartSerializer(serializers.ModelSerializer):"""用户的模型序列化器-写入"""class Meta:model = Cartfields = '__all__'class ReadInfoSerializer(serializers.ModelSerializer):"""用户的模型序列化器-读取"""goods =GoodsSerializer()class Meta:model = Cartfields = '__all__'# view
from rest_framework import status
from rest_framework.response import Response
from rest_framework.viewsets import GenericViewSet,mixins
from .models import Cart
from .serializers import CartSerializer, ReadInfoSerializer# Create your views here.class  CartViecw(GenericViewSet,mixins.CreateModelMixin,mixins.UpdateModelMixin,mixins.DestroyModelMixin,mixins.ListModelMixin):queryset = Cart.objects.all()serializer_class = CartSerializerdef get_serializer_class(self):# 实现读写操作使用不同的序列化器if self.action == 'list':return ReadInfoSerializerelse:return self.serializer_classdef create(self, request, *args, **kwargs):user = request.usergoods  =request.data.get('goods')if Cart.objects.filter(user=user,goods=goods):# 该商品存在cart_goods = Cart.objects.get(user=user,goods=goods)cart_goods.number +=1cart_goods.save()# 商品序列化serializer = self.get_serializer(cart_goods)return Response(serializer.data,status=status.HTTP_201_CREATED)else:# 没有该商品则进行添加该商品request.data['user'] = user.idreturn super().create(request,*args,**kwargs)def list(self, request, *args, **kwargs):query =self.get_queryset().filter(user=request.user)serializer = self.get_serializer(query, many=True)return Response(serializer.data)def update_goods_status(self,request, *args, **kwargs):obj =self.get_object()obj.is_checked = not obj.is_checkedobj.save()return Response({"message":'修改成功'},status=status.HTTP_200_OK)def update_goods_number(self,request, *args, **kwargs):number = request.data.get('number')obj = self.get_object()if not isinstance(number,int): return Response({'error':'参数number只可为INT类型'})if number > obj.goods.stock:return Response({"message": "数量不可超过该商品的库存数量"}, status=status.HTTP_422_UNPROCESSABLE_ENTITY)elif number <= 0:obj.delete()return Response({"message":"修改成功,已删除"},status=status.HTTP_200_OK)else:obj.number = numberobj.save()return Response({"message": "修改成功"}, status=status.HTTP_200_OK)# url
from apps.cart.views import CartViecw
urlpatterns = [# 商品首页path('cart/', CartViecw.as_view({"post":'create','get':'list'})),# 修改商品购物车的状态path('cart/<int:pk>/checked/', CartViecw.as_view({"put":'update_goods_status'})),# 修改商品数量path('cart/<int:pk>/number/', CartViecw.as_view({"put": 'update_goods_number'})),]

以上是django restframework商城的后端实现。