lib/fields/filter.js
function filter(type) {
  if (utils.isObject(type)) {
    return type
  }
  else if (!filters.hasOwnProperty(type)) {
    throw new FieldError('Bad filter type: ' + type)
  }

  var args = utils.args(arguments, 1)
    , filter = {
      type: type
    }

  filters[type].apply(filter, args)

  return filter
}
function filter(type) {
  if (utils.isObject(type)) {
    return type
  }
  else if (!filters.hasOwnProperty(type)) {
    throw new FieldError('Bad filter type: ' + type)
  }

  var args = utils.args(arguments, 1)
    , filter = {
      type: type
    }

  filters[type].apply(filter, args)

  return filter
}
function filter ( type ) { if ( utils . isObject ( type ) ) { return type } else if ( ! filters . hasOwnProperty ( type ) ) { throw new FieldError ( 'Bad filter type: ' + type ) } var args = utils . args ( arguments , 1 ) , filter = { type : type } filters [ type ] . apply ( filter , args ) return filter }
Generate query filter object

@param {string|object} type Filter type or ready filter object
@returns {object} Brand new ready to use filter!
Generate query filter object