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# frozen_string_literal: true
# This concern is used to provide abstract ordering based on `params[:sort]`
module Orderable
extend ActiveSupport::Concern
SORT_ORDER = { '+' => :asc, '-' => :desc }.freeze
# A list of the param names that can be used for ordering the model list
def ordering_params(params)
# For example it retrieves a list of orders in descending order of total_value.
# Within a specific total_value, older orders are ordered first
#
# GET /orders?sort=-total_value,created_at
# ordering_params(params) # => { total_value: :desc, created_at: :asc }
#
# Usage:
# Order.order(ordering_params(params))
ordering = {}
params[:sort].try(:split, ',').try(:each) do |attr|
parsed_attr = parse_attr attr
if model.attribute_names.include?(parsed_attr)
ordering[parsed_attr] = SORT_ORDER[parse_sign attr]
end
end
ordering
end
private
# Parsing of attributes to avoid empty starts in case browser passes "+" as " "
def parse_attr(attr)
return attr.gsub(/^\ (.*)/, '\1') if attr.starts_with?(' ')
attr[1..-1]
end
# Ordering sign parse, which separates
def parse_sign(attr)
attr =~ /\A[+-]/ ? attr.slice!(0) : '+'
end
def model
(params[:resource] || params[:nested] || controller_name).classify.constantize
end
end
Version data entries
16 entries across 16 versions & 1 rubygems