mongodb aggegation- project key in root to inside an object | Hashnode

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Siraj abbas

Full stack web developer at Padath Infotainment Pvt Ltd

Aug 4, 2017

mongodb aggegation- project key in root to inside an object

Hi I have the following requirement.Somebody plz help me.

I am doing a mongodb aggregate operation for which my final data looks like below

{
 "data":{
},
  "subdata":[{}]
}

For some reason I would like to get the final result as

{
  "data":{
    "subdata":[{}]
  }
}

I tried several ways.It is not working as I expected.

PS:I am not using mongoose.

Sachin Kalsi

Passionate Programmer

Try Project like this.

{  "$project":
           {"data":
                 {"subdata": "$subdata","data": "$data"}
           }
}