Mongoose Find modify save

Question

I have a Mongoose User model   var User   mongoose model  Users       mongoose Schema           username   string           password   string           rights   string              I want to find one instance of the User model  modify it s properties  and save the changes  This is what I have tried  it s wrong     User find  username  oldUsername   function  err  user        user username   newUser username      user password   newUser password      user rights   newUser rights       user save function  err            if err                console error  ERROR                             What is the syntax to find  modify and save an instance of the User model

User · Answer

You could also write it a little more cleaner using updateOne & $set, plus async/await.

const updateUser = async (newUser) => {
  try {
    await User.updateOne({ username: oldUsername }, {
      $set: {
        username: newUser.username,
        password: newUser.password,
        rights: newUser.rights
      }
    })
  } catch (err) {
    console.log(err)
  }
}

Since you don't need the resulting document, you can just use updateOne instead of findOneAndUpdate.

Here's a good discussion about the difference: MongoDB 3.2 - Use cases for updateOne over findOneAndUpdate

User · Answer

I wanted to add something very important  I use JohnnyHK method a lot but I noticed sometimes the changes didn t persist to the database  When I used  markModified it worked   User findOne  username  oldUsername   function  err  user       user username   newUser username     user password   newUser password     user rights   newUser rights      user markModified username     user markModified password     user markModified rights      user save function  err        if err            console error  ERROR                        tell mongoose about the change with doc markModified  pathToYourDate   before saving

User · Answer

findOne  modify fields  amp  save  User findOne  username  oldUsername      then user   gt        user username   newUser username      user password   newUser password      user rights   newUser rights       user markModified  username        user markModified  password        user markModified  rights         user save err   gt  console log err          OR findOneAndUpdate  User findOneAndUpdate  username  oldUsername     set    username  newUser username  user  newUser password  user newUser rights      new  true    err  doc    gt        if  err            console log  Something wrong when updating data               console log doc         Also see updateOne

User · Answer

Why not use Model update  After all you re not using the found user for anything else than to update it s properties   User update  username  oldUsername         username  newUser username       password  newUser password       rights  newUser rights    function err  numberAffected  rawResponse         handle it

User · Answer

If you want to use find  like I would for any validation you want to do on the client side   find returns an ARRAY of objects  findOne returns only an object  Adding user   user 0  made the save method work for me   Here is where you put it   User find  username  oldUsername   function  err  user        user   user 0       user username   newUser username      user password   newUser password      user rights   newUser rights       user save function  err            if err                console error  ERROR

User · Answer

The user parameter of your callback is an array with find   Use findOne instead of find when querying for a single instance   User findOne  username  oldUsername   function  err  user        user username   newUser username      user password   newUser password      user rights   newUser rights       user save function  err            if err                console error  ERROR

[javascript] Mongoose: Find, modify, save

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