Features = new Meteor.Collection("features"); Schemas.Feature = new SimpleSchema({ charId: {type: String, regEx: SimpleSchema.RegEx.Id}, name: {type: String, trim: false}, description:{type: String, optional: true, trim: false}, uses: {type: String, optional: true, trim: false}, used: {type: Number, defaultValue: 0}, reset: {type: String, allowedValues: ["manual", "longRest", "shortRest"], defaultValue: "manual"}, color: {type: String, allowedValues: _.pluck(colorOptions, "key"), defaultValue: "q"} }); Features.attachSchema(Schemas.Feature); Features.helpers({ usesLeft: function(){ return evaluate(this.charId, this.uses) - this.used; }, usesValue: function(){ return evaluate(this.charId, this.uses); } });