猫鼬-使用findOne递增 [英] Mongoose - Increment with findOne

问题描述

我正在用Mongoose处理一些查询，我需要跳过和限制子文档，但是在同一查询中，我想增加文档中的某些字段.目前，我的查询是使用链接建立的，因为尝试仅使用选项时会遇到很多问题.这就是我所拥有的:

I'm working on some query with Mongoose where I need to skip and limit subdocuments, but in the same query I want to increment some field in document. Currently is my query built with chaining, because I got a lot of problem when I tried to do it just with options. This is what I have:

Model.findOne({ shorten_id: id }).select('title content comments views').slice('comments', [0, 10]).exec(function(err, db_res) { if (err) { throw err; } else { console.log(db_res); } });

调用此查询时，我希望将提交的视图"数增加1，但正如我所说，我尝试了很多事情，但它根本没有用.

I would like to increment filed 'views' for 1 when calling this query, but as I said, I tried a lot of things and it just didn't work.

推荐答案

您可以使用 findOneAndUpdate 修改文档，同时也要获取文档.

You can use findOneAndUpdate to modify a document while also fetching one.

Model.findOneAndUpdate({ shorten_id: id }, { $inc: { fieldToIncrement: 1 })
  .select('title content comments views')
  .slice('comments', [0, 10])
  .exec(function(err, db_res) { 
    if (err) { 
      throw err; 
    } 
    else { 
      console.log(db_res); 
    } 
  });

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