Question

我有一个用户的猫鼬模式，该用户具有一个viewes_posts字段，该字段是一个对象数组，这些对象引用了另一个猫鼬模式（post）。现在，我想在此对象数组中添加两个以上字段。

我这样尝试过：

viewed_posts: [
    {
      hits: {type: Number, default: 0},
      actualViewsByUser: {type: Number, default: 0},
      type: mongoose.Schema.Types.ObjectId,
      ref: "Post"
    }
  ]

但是当我使用User.populate（“ viewed_posts”）函数时，它不会显示“ hits”和“ actualViewsByUser”，而只会显示帖子架构的完整字段。

这是我要访问这些字段的代码：

User.findById(req.user._id).populate("viewed_posts").exec(function(err,user){
      if(err) console.log(err);
      else{
        console.log("usre found , now we are going to update the views")
        Post.findOne({slug: req.params.slug},(err,post)=>{
          if(err) console.log(err);
          else{
            user.viewed_posts.push(post);
            user.save();
            let index= 0;
            console.log("viewed_posts.length",user.viewed_posts.length);
            for(var i=0;i<user.viewed_posts.length;i++){
              console.log("post.slug", post.slug)
              console.log("user.viewed_posts.slug", user.viewed_posts[i].slug)
              if(post.slug === user.viewed_posts[i].slug){
                console.log(user.viewed_posts[i]);
                index = i;
                break;
              }
            }
            console.log("index  : ", index);
            console.log("increasing number of hits each time this particular user visits this post");
            console.log("user.viewed_posts.hits before  : " , user.viewed_posts[index].data.hits)
            user.viewed_posts[index].hits +=1;
            console.log("user.viewed_posts.hits after  : " , user.viewed_posts[index].data.hits)
            console.log("increasing number of hits of the post no matter how many times any user visit here");
            console.log("post.views before  : " , post.views)
            post.views +=1;
            console.log("post.views after  : " , post.views)
            if(user.viewed_posts[index].actualViewsByUser != 4){
              console.log("increasing number of actualViews of this post only if this user haven't visited more than 4 times");
              console.log("post.actualViews before  : " , post.actualViews)
              post.actualViews +=1;
              console.log("post.actualViews after  : " , post.actualViews)
              post.save((err,post)=>{
                if(err) console.log(err)
                else console.log("post saved sucessfully",post);
              });
              console.log("user.viewed_posts.actualViewsByUser after  : " , user.viewed_posts[index].actualViewsByUser)
              user.viewed_posts.actualViewsByUser += 1;
              console.log("user.viewed_posts.actualViewsByUser after  : " , user.viewed_posts[index].actualViewsByUser)
            }
            
            
          }
        })
      }
    })

这是输出：

increasing number of hits each time this particular user visits this post
user.viewed_posts.hits before  :  undefined
user.viewed_posts.hits after  :  NaN
increasing number of hits of the post no matter how many times any user visit here
post.views before  :  0
post.views after  :  1
increasing number of actualViews of this post only if this user haven't visited more than 4 times
post.actualViews before  :  0
post.actualViews after  :  1
user.viewed_posts.actualViewsByUser after  :  undefined
user.viewed_posts.actualViewsByUser after  :  undefined

我该怎么做才能将这两个字段（hits，actualViewsByUser）集成到此字段（viewed_posts）中？任何帮助将不胜感激。

Answer 1

因为必须指定要填充的字段。

User.findById(req.user._id).populate("viewed_posts", "hits actualViewsByUser", Post) // pass in the Post model as well (you'll have to import this).

我传入模型是因为之前有错误，因为猫鼬没有正确填写我的字段。

但是，我不确定您的方法是最好的方法。 “点击数”和“ actualViewsByUser”将通过ID引用特定的帖子。当您使用填充猫鼬时，将获取ID，查找相关帖子，然后填充适当的信息“匹配”，“ actualViewsByUser”等。“匹配”和“ actualViewsByUser”需要存储在您的Post模型中，不是您的用户模型。

如何将更多字段（在猫鼬模式中）添加到一个字段（这是一个对象数组）中，并且这些对象引用另一个猫鼬模式？

1 个答案: