module Motor::ApiQuery::Sort

Constants

FIELD_PARSE_REGEXP

Public Instance Methods

build_arel_order(model, param) click to toggle source
# File lib/motor/api_query/sort.rb, line 36
def build_arel_order(model, param)
  param.split(',').map do |field|
    direction, key = field.match(FIELD_PARSE_REGEXP).captures
    *path, field = key.split('.')

    reflection_model =
      path.reduce(model) do |acc, fragment|
        acc.reflections[fragment].klass
      end

    arel_column = reflection_model.arel_table[field]

    direction.present? ? arel_column.desc : arel_column.asc
  end
end
build_join_params(_model, param) click to toggle source
# File lib/motor/api_query/sort.rb, line 21
def build_join_params(_model, param)
  param.split(',').each_with_object({}) do |field, result|
    key = field[FIELD_PARSE_REGEXP, 2]
    *path, _ = key.split('.')

    path.reduce(result) do |acc, fragment|
      hash = {}

      acc[fragment] = hash

      hash
    end
  end
end
call(rel, param) click to toggle source
# File lib/motor/api_query/sort.rb, line 10
def call(rel, param)
  return rel if param.blank?

  arel_order = build_arel_order(rel.klass, param)
  join_params = build_join_params(rel.klass, param)

  rel = rel.left_joins(join_params) if join_params.present?

  rel.reorder(arel_order)
end