九、个人中心功能开发

#drf文档，title自定义
    path('docs',include_docs_urls(title='仙剑奇侠传')),

class GoodsListViewSet(mixins.ListModelMixin, mixins.RetrieveModelMixin,viewsets.GenericViewSet):
    '''
    list:
        商品列表，分页，搜索，过滤，排序
    retrieve:
        获取商品详情
    '''

class UserDetailSerializer(serializers.ModelSerializer):
    """
    用户详情
    """
    class Meta:
        model = User
        fields = ("name", "gender", "birthday", "email","mobile")

class UserViewset(CreateModelMixin,mixins.RetrieveModelMixin,viewsets.GenericViewSet):
    '''
    用户
    '''
    serializer_class = UserRegSerializer
    queryset = User.objects.all()
    authentication_classes = (JSONWebTokenAuthentication, authentication.SessionAuthentication)

    def create(self, request, *args, **kwargs):
        serializer = self.get_serializer(data=request.data)
        serializer.is_valid(raise_exception=True)
        user = self.perform_create(serializer)
        re_dict = serializer.data
        payload = jwt_payload_handler(user)
        re_dict["token"] = jwt_encode_handler(payload)
        re_dict["name"] = user.name if user.name else user.username

        headers = self.get_success_headers(serializer.data)

        return Response(re_dict, status=status.HTTP_201_CREATED, headers=headers)

    #这里需要动态权限配置
    #1.用户注册的时候不应该有权限限制
    #2.当想获取用户详情信息的时候，必须登录才行
    def get_permissions(self):
        if self.action == "retrieve":
            return [permissions.IsAuthenticated()]
        elif self.action == "create":
            return []

        return []

    #这里需要动态选择用哪个序列化方式
    #1.UserRegSerializer（用户注册），只返回username和mobile，会员中心页面需要显示更多字段，所以要创建一个UserDetailSerializer
    #2.问题又来了，如果注册的使用userdetailSerializer，又会导致验证失败，所以需要动态的使用serializer
    def get_serializer_class(self):
        if self.action == "retrieve":
            return UserDetailSerializer
        elif self.action == "create":
            return UserRegSerializer

        return UserDetailSerializer

    #虽然继承了Retrieve可以获取用户详情，但是并不知道用户的id，所有要重写get_object方法
    #重写get_object方法，就知道是哪个用户了
    def get_object(self):
        return self.request.user

    def perform_create(self, serializer):
        return serializer.save()

class UserViewset(CreateModelMixin,mixins.RetrieveModelMixin,mixins.UpdateModelMixin,viewsets.GenericViewSet):

class UserFavDetailSerializer(serializers.ModelSerializer):
    '''
    用户收藏详情
    '''

    #通过商品id获取收藏的商品，需要嵌套商品的序列化
    goods = GoodsSerializer()
    class Meta:
        model = UserFav
        fields = ("goods", "id")

 #动态选择serializer
    def get_serializer_class(self):
        if self.action == "list":
            return UserFavDetailSerializer
        elif self.action == "create":
            return UserFavSerializer
        return UserFavSerializer

# user_operaton/views.py

from rest_framework import viewsets
from rest_framework import mixins
from .models import UserFav
from .serializers import UserFavSerializer,UserFavDetailSerializer
from rest_framework.permissions import IsAuthenticated
from utils.permissions import IsOwnerOrReadOnly
from rest_framework_jwt.authentication import JSONWebTokenAuthentication
from rest_framework.authentication import SessionAuthentication

class UserFavViewset(viewsets.GenericViewSet, mixins.ListModelMixin, mixins.CreateModelMixin, mixins.DestroyModelMixin):
    '''
    用户收藏
    '''
    #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'

    #动态选择serializer
    def get_serializer_class(self):
        if self.action == "list":
            return UserFavDetailSerializer
        elif self.action == "create":
            return UserFavSerializer
        return UserFavSerializer

    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)

class LeavingMessageSerializer(serializers.ModelSerializer):
    '''
    用户留言
    '''
    # 获取当前登录的用户
    user = serializers.HiddenField(
        default=serializers.CurrentUserDefault()
    )
    #read_only:只返回，post时候可以不用提交，format：格式化输出
    add_time = serializers.DateTimeField(read_only=True, format='%Y-%m-%d %H:%M')
    class Meta:
        model = UserLeavingMessage
        fields = ("user", "message_type", "subject", "message", "file", "id" ,"add_time")

class LeavingMessageViewset(mixins.ListModelMixin, mixins.DestroyModelMixin, mixins.CreateModelMixin,
                            viewsets.GenericViewSet):
    """
    list:
        获取用户留言
    create:
        添加留言
    delete:
        删除留言功能
    """

    permission_classes = (IsAuthenticated, IsOwnerOrReadOnly)
    authentication_classes = (JSONWebTokenAuthentication, SessionAuthentication)
    serializer_class = LeavingMessageSerializer

    # 只能看到自己的留言
    def get_queryset(self):
        return UserLeavingMessage.objects.filter(user=self.request.user)

# 配置用户留言的url
router.register(r'messages', LeavingMessageViewset, base_name="messages")

class AddressSerializer(serializers.ModelSerializer):
    user = serializers.HiddenField(
        default=serializers.CurrentUserDefault()
    )
    add_time = serializers.DateTimeField(read_only=True, format='%Y-%m-%d %H:%M')

    class Meta:
        model = UserAddress
        fields = ("id", "user", "province", "city", "district", "address", "signer_name", "add_time", "signer_mobile")

class AddressViewset(viewsets.ModelViewSet):
    """
    收货地址管理
    list:
        获取收货地址
    create:
        添加收货地址
    update:
        更新收货地址
    delete:
        删除收货地址
    """
    permission_classes = (IsAuthenticated, IsOwnerOrReadOnly)
    authentication_classes = (JSONWebTokenAuthentication, SessionAuthentication)
    serializer_class = AddressSerializer

    def get_queryset(self):
        return UserAddress.objects.filter(user=self.request.user)

# 配置收货地址
router.register(r'address',AddressViewset , base_name="address")