Model.find() Model.findOne() Model.findOneAndDelete() Model.findOneAndRemove() Model.findOneAndUpdate() 大部分都大同小意,然后findOne跟find的差别就是,一个是查询所有满足条件的文档,一个是只返回第一个,因此我这里只讲一个find的用法: Modle.find.(conditions, [projection], [options], [callback] )...
findOneAndUpdate findByIdAndUpdate findOneAndRemove findByIdAndRemove create update mapReduce aggregate base schema modelName collection db namedscope.js decorate promise.js Promise on emit complete error addCallback addErrback addBack resolve query.js Query setOptions bind exec find cast _optionsForExec...
使用find（）+ limit（）更快，因为findOne（）总是读取+返回文档（如果它存在）。
Once we have our model, we can then instantiate it, and save it: constinstance=newMyModel();instance.my.key='hello';awaitinstance.save(); Or we can find documents from the same collection awaitMyModel.find({}); You can alsofindOne,findById,update, etc. ...
chore: remove tbd dependency re: security warnings from github Oct 29, 2018 docs docs(middleware): add findOneAndDelete Dec 12, 2018 examples chore: use latest express in example Oct 30, 2018 lib fix(mongoose): fix quick issue re:Automattic#5648, only apply logic … ...
link to lean, findoneandupdate, query casting tutorials from query docs #9410 553 554 5.10.4 / 2020-09-09 555 === 556 * fix(document): allow setting nested path to instance of model #9392 557 * fix: handle `findoneandremove()` with `orfail()` #9381 558 * fix(schema): support s...
您也可以直接在MongoDB中进行更新，而无需加载文档并使用代码进行修改。使用$pull或$pullAll运算符从数组...
deleteOne distinct elemMatch equals error exec exists find findOne findOneAndRemove findOneAndUpdate geometry getQuery getUpdate gt gte hint in intersects lean limit lt lte maxDistance maxscan maxScan merge merge mod mongooseOptions ne near nearSphere nin nor or polygon populate Query read regex remo...
也可以用vs进行安装。右键工程上的npm,选择Install New npm Packages。 第一次会下载安装一个工具,安装完成之后,搜索Mongoose,出现下面的界面,并安装。 2.建立连接 到这一步环境终于是准备好了,接下来在app_server 文件夹下创建一个models目录,并新建一个db.js ...
Model.findOneAndDelete() Model.findOneAndRemove() Model.findOneAndUpdate() 大部分都大同小意,然后findOne跟find的差别就是,一个是查询所有满足条件的文档,一个是只返回第一个,因此我这里只讲一个find的用法: ...