node.js - Inserting objects in MongoDB to field that can reference two different objects -

in project have messages model looks this:

var messageschema = new schema({ fromid: {     type: entityid,     required: true }, toid: {     type: entityid,     required: true }, important: {     type: boolean,      required: false }, lessonid: {     type: schema.types.objectid,      ref: models.lesson,     required: false }, memberid: {     type: schema.types.objectid,      ref: models.lesson,     required: false }, message: {     type: string,      required: true }}); 

as long message can sent , received either user , school i've created complex type 'entityid' looks this:

var entityid = { id: {     type: schema.types.objectid,     required: true }, entityname: {     type: string,     required: true,     enum: entitytypelist.array }}; 

and i'm putting 'type' in fields fromid , toid in messageschema (as shown above). now, when try insert entities one:

    samplemessage1: {     _id:"560e9504cac9a42f0e415bca",     memberid: "5631f6883ad9bc561889f006",     deleted:true,     fromid:         {             entityname:"school",             id:"55d1e957daea17d3e90a3c51"         },     toid:         {             entityname:"user",             id:"569b89bb90d3ccd06d96644b"         },     important:false,     message:"sample message.",     messagetype:"notification",     read:true,     timestamp:"2015-07-31t16:11:32.714z" } 

using 'schema.create', in 'id' field, in database both in fromid , toid, instead of objectid string. know can this:

id: new objectid(55d1e957daea17d3e90a3c51") 

but wonder if there's solution don't have change sample messages , can showed without using 'ref:'?

how inserting entities? if doing message.insert(data) overriding mongoose. try create message first

var message = new message(data); message.save();