Get the id of inserted document in Mongo database in NodeJS

Question

I use NodeJS to insert documents in MongoDB  Using collection insert I can insert a document into database like in this code          collection insert objectToInsert  function err      if  err  return        Object inserted successfully     var objectId                        How can I get the  id of inserted object   Is there any way to get the  id without getting latest object inserted  id   Supposing that in same time a lot of people access the database  I can t be sure that the latest id is the id of object inserted

User · Answer

As ktretyak said  to get inserted document s ID best way is to use insertedId property on result object  In my case result  id didn t work so I had to use following    db collection  collection-name      insertOne document     then result   gt        console log result insertedId           catch err   gt           handle error         It s the same thing if you use callbacks

User · Answer

JSideris  sample code for getting insertedId   db collection COLLECTION  insertOne data   err  result    gt        if  err         return err      else        return result insertedId

User · Answer

Mongo sends the complete document as a callbackobject so you can simply get it from there only   for example  collection save function err room     var newRoomId   room  id

User · Answer

I actually did a console log   for the second parameter in the callback function for insert  There is actually a lot of information returned apart from the inserted object itself  So the code below explains how you can access it s id    collection insert objToInsert  function  err  result       if err console log err       else           console log result  ops   0    id                The above statement will output the id of the             inserted object

User · Answer

There is a second parameter for the callback for collection insert that will return the doc or docs inserted  which should have  ids   Try   collection insert objectToInsert  function err docsInserted       console log docsInserted         and check the console to see what I mean

User · Answer

Another way to do it in async function   const express   require  express   const path   require  path   const db   require path join   dirname      database config    db  const router   express Router       Create R U D router post   new-order   async function  req  res  next            security check     if  Object keys req body  length     0            res status 404  send               msg   quot Error quot               code  404                     return             try               operations         let orderNumber   await db collection  orders   countDocuments           let number   orderNumber   1         let order                 number  number              customer  req body customer              products  req body products              totalProducts  req body totalProducts              totalCost  req body totalCost              type  req body type              time  req body time              date  req body date              timeStamp  Date now                        if  req body direction                order direction   req body direction                    if  req body specialRequests                order specialRequests   req body specialRequests                       Here newOrder will store some informations in result of this process             You can find the inserted id and some informations there too                   let newOrder   await db collection  orders   insertOne     order            if  newOrder                    MARK  Server response             res status 201  send                   msg   Order N    number  created   id   newOrder insertedId                     code  201                            else                   MARK  Server response             res status 404  send                   msg   Order N    number  not created                   code  404                                   catch  e            print e          return               C Read U D      C R Update D      C R U Delete    module exports   router

User · Answer

A shorter way than using second parameter for the callback of collection insert would be using objectToInsert  id that returns the  id  inside of the callback function  supposing it was a successful operation    The Mongo driver for NodeJS appends the  id field to the original object reference  so it s easy to get the inserted id using the original object   collection insert objectToInsert  function err      if  err  return        Object inserted successfully     var objectId   objectToInsert  id     this will return the id of object inserted

User · Answer

Now you can use insertOne method and in promise s result insertedId

User · Answer

if you want to take   id  use simpley  result insertedId toString         toString will convert from hex

User · Answer

You could use async functions to get  id field automatically without manipulating data object  async function save       const data         name   quot John quot         await db collection  users   insertOne data     return data    Returns data       id   5dbff150b407cc129ab571ca     name   John

[javascript] Get the _id of inserted document in Mongo database in NodeJS

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