How to get multiple document using array of MongoDb id?

Question

I have an array of ids and I want to get all document of them at once. For that I am writing but it return 0 records.

How can I search using multiple Ids ?

Answer 1

For finding records of multiple documents you have to use "$in" operator Although your query is fine, you just need to add ObjectId while finding data for Ids

db.feed.find({
  "_id" : {
    "$in" : 
      [ObjectId("55880c251df42d0466919268"), 
       ObjectId("55bf528e69b70ae79be35006")
      ]
   }
});

Answer 2

MongoDB is type sensitive, which means 1 is different with '1', so are "55880c251df42d0466919268" and ObjectId("55880c251df42d0466919268"). The later one is in ObjectID type but not str, and also is the default _id type of MongoDB document.

You can find more information about ObjectID here.

Just try:

db.getCollection('feed').find({"_id" : {"$in" : [ObjectId("55880c251df42d0466919268"), ObjectId("55bf528e69b70ae79be35006")]}});

Answer 3

I believe you are missing the ObjectId. Try this:

db.feed.find({ 
    _id: {
        $in: [ObjectId("55880c251df42d0466919268"), ObjectId("55bf528e69b70ae79be35006")]
    }
});

Answer 4

Just I have use it, and is working fine:

module.exports.obtenerIncidencias386RangoDias = function (empresas, callback) {
    let arraySuc_Ids = empresas.map((empresa)=>empresa.sucursal_id)
            incidenciasModel.find({'sucursal_id':{$in:arraySuc_Ids}
            }).sort({created_at: 'desc'}).then(
                (resp)=>    {
                    callback(resp)}
            )
};

where:

empresas = ["5ccc642f9e789820146e9cb0","5ccc642f9e789820146e9bb9"]