无法在用户愿望清单键中附加多个项目

Posted 2023-02-22

【中文标题】无法在用户愿望清单键中附加多个项目

【英文标题】：Unable to append multiple items inside user wishlist key

【发布时间】：2022-01-20 07:24:56

【问题描述】：

这是我的前端代码。最初我从令牌中获取用户，令牌存在于本地存储中，然后是更新用户的代码和获取更新数据库中的用户的代码。

     let token = JSON.parse (localStorage.getItem ('token'));
        
        async function addtoWishlist (id) 
          let temp = await findId ();
          let user = await temp.json ();
          let wishlistArray = user.wishItems;
          console.log ('wishlistArray:', wishlistArray);
        
          wishlistArray.push (id);
          let dts = 
            wishItems: wishlistArray,
          ;
          let data_to_send = JSON.stringify (dts);
        
          fetch (`http://localhost:2233/*/user/add`, 
            method: 'PATCH',
            body: data_to_send,
            headers: 
              'Content-Type': 'application/json',
              Authorization: `Bearer $token`,
            ,
          )
            .then (k => 
              return k.json ();
            )
            .then (res => 
              console.log (res);
            )
            .catch (err => 
              console.log (err);
            );
        
        
        async function findId () 
          let user = await fetch (`http://localhost:2233/*/user`, 
            headers: 
              'Content-Type': 'application/json',
        
              Authorization: `Bearer $token`,
            ,
          );
        
          return user;
        

控制器代码

app.get ('/*/user', authenticate, async (req, res) => 
  const user = req.user.user;

  return res.send (user);
);

app.patch ('/*/user/add', authenticate, async (req, res) => 
  try 
    console.log ('inside patch');

    let user = req.user.user;
    console.log ('user:', user);
    console.log (req.body);

    user = await User.findByIdAndUpdate (user._id, req.body, 
      new: true,
    )
      .lean ()
      .exec ();
    console.log ('after-user', user);
    return res.send (user);
   catch (e) 
    return res.send (e.message);
  
);

用户架构如下所示

const userSchema = new Schema (
  
    fullName: type: String, required: false,
    email: type: String, required: true,
    password: type: String, required: true,
    username: type: String, required: true,
    mobile: type: Number, required: true,
    description: type: String, required: true,
    bagItems: [
      
        productId: 
          type: Schema.Types.ObjectId,
          ref: 'product',
          required: false,
        ,
        count: type: Number, required: false,
      ,
    ],
    wishItems: [
      
        type: Schema.Types.ObjectId,
        ref: 'product',
      ,
    ],
  ,
  
    versionKey: false,
    timestamps: true,
  
);

** 每当我将项目添加到愿望清单时，它都会替换已经存在的项目...................... ..................................................... ..................................................... ..................................................... ..................................................... ..................................................... ....**

【问题讨论】：

请修剪您的代码，以便更容易找到您的问题。请按照以下指南创建minimal reproducible example。

【参考方案1】：

你需要使用$push operator

user = await User.findByIdAndUpdate (user._id,  $push: req.body ,  ...

确保req.body 仅具有wishItems 属性，没有别的。

【讨论】：

非常感谢，现在可以使用了。

酷。随意接受我的回答；）