Add faceted search to your Meteor project, using Mongo. Individual facets are in an array of objects of the form fieldName: [ { name: 'value1', count: 1}, { name: 'value2', count: 3 }, { name: 'value3', count: 16 }, { name: null, count: 10 } ]

A facet name of null counts documents whose field value is an empty array.

if Meteor.isServer
  Facets.configure MyCollection,
    field1: String
    field2: [String]

  Meteor.publish 'myCollection', (field1, field2) ->
    check field1, String
    check field2, [String]
    MyCollection.findWithFacets({field1: field1, field2: {$in: field2}})

if Meteor.isClient
  Meteor.subscribe 'myCollection', 'value1', []

  Facets.findOne({collection: 'myCollection'})?.facets