Question

I am trying to get results from mongodb using(mongoose) the below query.

RolesModel.findOne({ role: 'reviewer' }, function (err, role) {
            if (err) return res.status(500).send("Error getting data of reviewers");
            console.log(role._id);
            UserModel.find({ roles: role._id }, function (err, reviewers) {
                if (err) return res.status(500).send("Error getting reviewers from user table");
                res.send(reviewers);
            });
        });

its not returning any values. User schema is as follows:

var UserSchema = new Schema({
id: String,
//some other fields
roles: Array
}, { collection: 'conf_user' });

currently I have data like this.

{ "_id" : ObjectId("57c2fa7156c1f6291d373227"), "roles" : [ "57c2fa6583b7bf0c1d452877" ], "__v" : 0 }

"57c2fa6583b7bf0c1d452877" this id is from "roles" table.

If i put, UserModel.find({ roles: '57c2fa6583b7bf0c1d452877'} then it will return me values.

Not sure what I am missing here. I have tried this also

{ roles: { $elemMatch: { roles: role._id } }

Answer 1

role._id will return an id of type ObjectId, but roles are stored in the form of array of StringIds. Convert the ObjectId to string value using role._id.toString() before you pass the role._id to UserModel.find

RolesModel.findOne({ role: 'reviewer' }, function (err, role) {
    if (err) 
        return res.status(500).send("Error getting data of reviewers");
        UserModel.find({ roles: role._id.toString() }, function (err, reviewers) {
            if (err) 
                return res.status(500).send("Error getting reviewers from user table");
            res.send(reviewers);
        });
    });

Not getting results from mongodb using mongoose

1 个答案: