class RailsCoreExtensions::Sortable
Public Class Methods
new(params, controller_name)
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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)
# File lib/rails_core_extensions/sortable.rb, line 10 def initialize(params, controller_name) @params = params.permit!.to_h.symbolize_keys @controller_name = controller_name @klass = controller_name.classify.constantize end
Public Instance Methods
sort()
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# File lib/rails_core_extensions/sortable.rb, line 16 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 Instance Methods
sort_collection(collection_old, collection_new_ids)
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# File lib/rails_core_extensions/sortable.rb, line 34 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
update(object, new_position)
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# File lib/rails_core_extensions/sortable.rb, line 45 def update(object, new_position) @klass.find(object.id).update(position: new_position) end