Django+Vue打造购物网站(六)
商品详情页功能
商品详情页和CategoryViewSet类似,只需要多继承一个类（mixins.RetrieveModelMixin）就可以了
class GoodsListViewSet(mixins.ListModelMixin,mixins.RetrieveModelMixin, viewsets.GenericViewSet):
商品轮播图是一个外键，序列化外键用嵌套的方法来实现
# 轮播图
class GoodsImageSerializer(serializers.ModelSerializer):
class Meta:
model = GoodsImage
fields = ("image",)
# ModelSerializer实现商品列表页
class GoodsSerializer(serializers.ModelSerializer):
# 覆盖外键字段
category = CategorySerializer()
# images是数据库中设置的related_name="images"，把轮播图嵌套进来
images = GoodsImageSerializer(many=True)
class Meta:
model = Goods
fields = '__all__'
打开浏览器,找到一个商品打开,查看详情
数据应该已经填充进去了,如果商品详情中的图片未显示,
打开根目录下的proxy.js文件,将里面的url修改为本地即可
module.exports = {
"/": "http://127.0.0.1:8000"
};
热卖商品接口实现
只需要在过滤器中增加is_hot就可以了
goods/filters.py里的GoodsFilter添加is_hot
class Meta:
model = Goods
fields = ['pricemin', 'pricemax','is_hot']
在后台设置商品的is_hot为True,然后前端就可以显示出来了
用户收藏接口实现
user_operation/serializers.py
from rest_framework import serializers
from rest_framework.validators import UniqueTogetherValidator
from user_operation.models import UserFav
class UserFavSerializer(serializers.ModelSerializer):
# 获取当前登录的用户
user = serializers.HiddenField(
default=serializers.CurrentUserDefault()
)
class Meta:
# validate实现唯一联合，一个商品只能收藏一次
validators = [
UniqueTogetherValidator(
queryset=UserFav.objects.all(),
fields=('user', 'goods'),
# message的信息可以自定义
message="该商品已经收藏"
)
]
model = UserFav
# 收藏的时候需要返回商品的id，因为取消收藏的时候必须知道商品的id是多少
fields = ("user", "goods", 'id')
user_operation/views.py
from rest_framework import viewsets, mixins
from user_operation.models import UserFav
from user_operation.serializers import UserFavSerializer
class UserFavViewset(viewsets.GenericViewSet, mixins.ListModelMixin, mixins.CreateModelMixin, mixins.DestroyModelMixin):
'''
list:
获取用户的所有收藏
create:
添加收藏
destroy:
取消收藏
'''
queryset = UserFav.objects.all()
serializer_class = UserFavSerializer
配置url
# 配置用户收藏的url
router.register(r'userfavs', UserFavViewset, base_name="userfavs")
进行测试
当重复收藏某个商品时,会报错
drf的权限认证
http://www.django-rest-framework.org/api-guide/permissions/
utils文件夹下新建permissions.py
from rest_framework import permissions
class IsOwnerOrReadOnly(permissions.BasePermission):
"""
Object-level permission to only allow owners of an object to edit it.
Assumes the model instance has an `owner` attribute.
"""
def has_object_permission(self, request, view, obj):
# Read permissions are allowed to any request,
# so we'll always allow GET, HEAD or OPTIONS requests.
if request.method in permissions.SAFE_METHODS:
return True
# Instance must have an attribute named `owner`.
return obj.user == request.user
user_operation/views.py
class UserFavViewset(viewsets.GenericViewSet, mixins.ListModelMixin, mixins.CreateModelMixin, mixins.DestroyModelMixin):
'''
list:
获取用户的所有收藏
create:
添加收藏
destroy:
取消收藏
'''
serializer_class = UserFavSerializer
# permission是用来做权限判断的
# IsAuthenticated：必须登录用户；IsOwnerOrReadOnly：必须是当前登录的用户
permission_classes = (IsAuthenticated, IsOwnerOrReadOnly)
# auth使用来做用户认证的
authentication_classes = (JSONWebTokenAuthentication, SessionAuthentication)
# 搜索的字段
lookup_field = 'goods_id'
def get_queryset(self):
# 只能查看当前登录用户的收藏，不会获取所有用户的收藏
return UserFav.objects.filter(user=self.request.user)
只有登录用户才可以收藏
用户只能获取自己的收藏，不能获取所有用户的收藏
JSONWebTokenAuthentication认证不需要全局配置
删除settings中的'rest_framework_jwt.authentication.JSONWebTokenAuthentication',
将前端代码中的地址替换为本地,进行测试
搜索字段是在获取当前用户后操作的,
也就是说搜索的是当前用户的收藏,
而不是在所有用户中进行搜索,
def get_object(self):
"""
Returns the object the view is displaying.
You may want to override this if you need to provide non-standard
queryset lookups. Eg if objects are referenced using multiple
keyword arguments in the url conf.
"""
queryset = self.filter_queryset(self.get_queryset())
# Perform the lookup filtering.
lookup_url_kwarg = self.lookup_url_kwarg or self.lookup_field
收藏功能结束
