Module: ActiveRecord::Acts::List::NoUpdate::ClassMethods

Defined in:
lib/acts_as_list/active_record/acts/no_update.rb

Instance Method Summary collapse

Instance Method Details

#acts_as_list_no_update(extra_classes = [], &block) ⇒ Object

Lets you selectively disable all act_as_list database updates for the duration of a block.

Examples

class TodoList < ActiveRecord::Base

has_many :todo_items, -> { order(position: :asc) }

end

class TodoItem < ActiveRecord::Base

belongs_to :todo_list

acts_as_list scope: :todo_list

end

TodoItem.acts_as_list_no_update do

TodoList.first.update(position: 2)

end

You can also pass an array of classes as an argument to disable database updates on just those classes. It can be any ActiveRecord class that has acts_as_list enabled.

Examples

class TodoList < ActiveRecord::Base

has_many :todo_items, -> { order(position: :asc) }
acts_as_list

end

class TodoItem < ActiveRecord::Base

belongs_to :todo_list
has_many :todo_attachments, -> { order(position: :asc) }

acts_as_list scope: :todo_list

end

class TodoAttachment < ActiveRecord::Base

belongs_to :todo_list
acts_as_list scope: :todo_item

end

TodoItem.acts_as_list_no_update() do

TodoItem.find(10).update(position: 2)
TodoAttachment.find(10).update(position: 1)
TodoAttachment.find(11).update(position: 2)
TodoList.find(2).update(position: 3) # For this instance the callbacks will be called because we haven't passed the class as an argument

end



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# File 'lib/acts_as_list/active_record/acts/no_update.rb', line 73

def acts_as_list_no_update(extra_classes = [], &block)
  return raise ArrayTypeError unless extra_classes.is_a?(Array)

  extra_classes << self

  return raise DisparityClassesError unless active_record_objects?(extra_classes)

  NoUpdate.apply_to(extra_classes, &block)
end