queryInterface.js

  Query = {}
  Query.new = function() {

    var queryAttributes = {
      filters: [],
      beginDate: null,
      endDate: null,
      attribute: null

    }

    var queryObj = {
      where: function(filter) {
        queryAttributes.filters.push(filter)
        return queryObj;
      },
      between: function(begin,end) {
        queryAttributes.beginDate = begin
        queryAttributes.endDate = end
        return queryObj;
      },
      for: function(attributeName) {
        queryAttributes.attribute = attributeName
        return queryObj;
      },
      toMapping: function() {
        return queryAttributes;
      }
    }

    return queryObj;
  }

  var dailyWidgetQuery = Query.new().for('widgets').where({name: 'glen'}).where({type: 'lame'}).between(1,6)
  
  dailyWidgetQuery.toMapping()