Mongoose populate issue - array object

Question

My schema is as below

Sectionschema

var SectionSchema = new Schema({ name: String, documents : { type : [{ type: Schema.ObjectId, ref: 'Document' }] } } }

DocumentSchema

var DocumentSchema = new Schema({ name: String, extension: String, access: String, //private,public folderName : String, bucketName : String, desc: String });

Api.js

exports.section = function(req, res, next, id) { var fieldSelection = { _id: 1, name: 1, documents : 1 }; var populateArray = []; populateArray.push('documents'); Section.findOne({ _id: id }, fieldSelection) .populate(populateArray) .exec(function(err, section) { if (err) return next(err); if (!section) return next(new Error('Failed to load Section ' + id)); // Found the section!! Set it in request context. req.section = section; next(); }); }

If I go this way, I have the 'documents' object is []. However if I remove, "populateArray.push('documents');" then I get documents:['5adfsadf525sdfsdfsdfssdfsd'] -- some object Id (atleast)

Please let me know the way I need to populate.

Thanks.

Jayram · Accepted Answer · 2014-10-01 17:58:27Z

Change your query to

Section.findOne({ _id: id }, fieldSelection) .populate('documents.type') .exec(function(err, section) { if (err) return next(err); if (!section) return next(new Error('Failed to load Section ' + id)); // Found the section!! Set it in request context. req.section = section; next(); });

and this works. You need to give the path to populate.

Rohail Najam · Accepted Answer · 2016-11-14 06:28:12Z

If you just want "documents" in your schema pointing to Array of ObjectID which you will populate later. then you can use this.

var SectionSchema = new Schema({ name: String, documents : [{ type: Schema.ObjectId, ref: 'Document' }] });

And use the following to populate it

 Section.findOne({ _id: id }, fieldSelection) .populate('documents') .exec(function(err, section) { if (err) return next(err); if (!section) return next(new Error('Failed to load Section ' + id)); // Found the section!! Set it in request context. req.section = section; next(); });

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