如何在mongoDB中的数组和文档之间进行匹配和查找

Question

I have an array of IDs like for example

[id1,id2,id3,......]

and i have a collection with documents for example

 { "_id" : ObjectId("1111111111111"), "phoneNumber" : "1234567891", "fid" : "id1", "pid" : "abcd", "activeFlag" : true }, { "_id" : ObjectId("2222222222"), "phoneNumber" : "1234567891", "fid" : "id1", "pid" : "efgh", "activeFlag" : true }, { "_id" : ObjectId("33333333333"), "phoneNumber" : "1234567891", "fid" : "id2", "pid" : "xyz", "activeFlag" : true }, { "_id" : ObjectId("4444444444444"), "phoneNumber" : "1234567891", "fid" : "id3", "pid" : "mnop", "activeFlag" : true } 

i want to find the documents with fid which match IDs in my array of IDs , also i want to sort it according to _id and limit is 9.

if id1 taken then i need all documents which is having fid as id1, like that.

Answer 1

This script should do the trick

var listId = ["id1", "id2", "id3"]; 

var cursor =  db.collection.find({fid: {$in: listId}}).sort({_id: 1}).limit(9); 


// iterate over documents
if (cursor != null && cursor.hasNext()){
  while (cursor.hasNext()){
   // print documents
   print(JSON.stringify(cursor.next())); 
  }
}

to run it, create a file names script.js , copy the code above inside it and then run the command

mongo databaseName < script.js