how to find array in mongodb nodejs

Question

bookHistory:(memberId)=>{

        return new Promise(async(resolve,reject)=>{
           const historyData=await db.get().collection('bookborrow').find({userId:(memberId)}).toArray()
            const bookid=  await historyData.map(element => {
                 return element.data.bookname
             }) 
              console.log(bookid)
              const getBookName=await db.get().collection('bookdetails').find({_id:{$in:[objectid[bookid]]}}).toArray()
              console.log(getBookName)
     })
   }

historyData is output is look like ['62e53c1ff5d4c45fb7853d9e','62ea6268fd2fe8616cd4c17b'] and i need to data get this _id data from another collection

Can you please rephrase your problem? It is very hard to understand. Please read stackoverflow.com/help/how-to-ask, stackoverflow.com/help/minimal-reproducible-example and stackoverflow.com/editing-help. — Azhar Khan
– Azhar Khan, Commented Aug 4, 2022 at 8:19

Nairi Abgaryan · Accepted Answer · 2022-08-04 08:33:08Z

1

I suppose you meant to do a search using the ids array. If so, this should work.

import {Types} from 'mongoose';

const historyData=await db.get().collection('bookborrow').find({userId:(memberId)}).toArray()
const bookIds = await historyData.map(element => {
    return new Types.ObjectId(element.data.bookname)
}) 

const getBookName = await db.get().collection('bookdetails').find({
      _id: {
        $in: bookIds
      },
}).toArray()

answered Aug 4, 2022 at 8:33

Nairi Abgaryan

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