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Contents
module RailsCoreExtensions
class Sortable
# params is either:
# SIMPLE:
# model_body (where model is the model name)
# SCOPED:
# scope (name of the scope, e.g. category_id)
# category_id (or whatever the name of scope is)
# model_1_body (or whatever id of scope id)
def initialize(params, controller_name)
@params = params.permit!.to_h.symbolize_keys
@controller_name = controller_name
@klass = controller_name.classify.constantize
end
def sort
scope = @params[:scope].try(:to_sym)
@params[scope] = nil if @params[scope].blank?
body_key = @controller_name.singularize + (@params[scope] ? "_#{@params[scope]}" : '')
sorted_id_list = @params["#{body_key}_body".to_sym]
if sorted_id_list.blank?
sorted_id_list = @params["#{scope.to_s.gsub('_id', '')}_#{@params[scope]}_body".to_sym]
end
collection = @klass.reorder(:position)
collection = collection.where(@params.slice(scope)) unless scope.blank?
sort_collection(collection.find(sorted_id_list.map(&:to_i)), sorted_id_list.map(&:to_i))
end
private
def sort_collection(collection_old, collection_new_ids)
@klass.transaction do
collection_old.each.with_index do |object, index|
next if object.id == collection_new_ids[index]
new_position = collection_new_ids.index(object.id) + 1
update(object, new_position)
end
end
end
def update(object, new_position)
@klass.find(object.id).update(position: new_position)
end
end
end
Version data entries
11 entries across 11 versions & 1 rubygems