submission.js

gistfile1.txt

var Schema = mongoose.Schema, 
  ObjectId = Schema.ObjectId;

var submissionSchema = new Schema({
	sweepstakes_id: {
		type: Schema.Types.ObjectId,
		ref: 'Sweepstakes'
	},
	email: {
		type: String,
		index: true,
		unique: true
	},
	data: Schema.Types.Mixed
});