Querying within arrays.

publish.js

                return Jit.Core.Firm.find({ $or: [
                    {'ownerId' : this.userId},
                    { 'members': { $elemMatch: {
                        id: this.userId
                    } } }
                ]});

schema.js

        'members': {
            'type': [Object],
            'optional': true,
            'autoValue': function() {
                if (this.isInsert) {
                    return [{
                        id: Meteor.userId(),
                        addedOn: new Date,
                        active: true,
                        role: [
                            Jit.Core.Constants.Member.Admin,
                            Jit.Core.Constants.Member.Owner,
                            Jit.Core.Constants.Member.Member
                        ]
                    }];
                }
            }
        },
        "members.$.id": {
            type: String, //ForeignObject
            optional: true
        },
        "members.$.addedOn": {
            type: Date,
            optional: true
        },
        "members.$.active": {
            type: Boolean,
            optional: true
        },
        "members.$.role": {
            type: [String],
            optional: true
        },