rails--rails/activerecord/lib/arel/delete_manager.rb

# frozen_string_literal: true

module Arel # :nodoc: all
  class DeleteManager < Arel::TreeManager
    include TreeManager::StatementMethods

    def initialize
      super
      @ast = Nodes::DeleteStatement.new
      @ctx = @ast
    end

    def from(relation)
      @ast.relation = relation
      self
    end
  end
end
Enable frozen_string_literal in all files in arel 2017-02-13 13:58:58 -05:00			`# frozen_string_literal: true`
Arel: rubocop -a 2018-02-24 01:45:50 -05:00
Arel: :nodoc: all 2018-02-24 02:41:47 -05:00			`module Arel # :nodoc: all`
delete manager added 2010-08-18 14:32:44 -04:00			`class DeleteManager < Arel::TreeManager`
Handle DELETE with LIMIT in Arel MySQL supports DELETE with LIMIT and ORDER BY. https://dev.mysql.com/doc/refman/8.0/en/delete.html Before: ``` Post Destroy (1.0ms) DELETE FROM `posts` WHERE `posts`.`id` IN (SELECT `id` FROM (SELECT `posts`.`id` FROM `posts` WHERE `posts`.`author_id` = ? ORDER BY `posts`.`id` ASC LIMIT ?) __active_record_temp) [["author_id", 1], ["LIMIT", 1]] ``` After: ``` Post Destroy (0.4ms) DELETE FROM `posts` WHERE `posts`.`author_id` = ? ORDER BY `posts`.`id` ASC LIMIT ? [["author_id", 1], ["LIMIT", 1]] ``` 2018-09-30 05:30:47 -04:00			`include TreeManager::StatementMethods`

Remove `engine` from `TreeManager` and subclasses This constructor parameter was unused for everything except the convenience methods `to_sql` and `where_sql`. We can pass the engine into those methods directly. 2014-11-29 19:22:17 -05:00			`def initialize`
delete manager added 2010-08-18 14:32:44 -04:00			`super`
renaming @head to @ast 2010-11-05 17:09:09 -04:00			`@ast = Nodes::DeleteStatement.new`
refactoring where, fixing subselect 2010-12-07 13:46:30 -05:00			`@ctx = @ast`
delete manager added 2010-08-18 14:32:44 -04:00			`end`

Arel: rubocop -a 2018-02-24 01:45:50 -05:00			`def from(relation)`
renaming @head to @ast 2010-11-05 17:09:09 -04:00			`@ast.relation = relation`
delete manager added 2010-08-18 14:32:44 -04:00			`self`
			`end`
			`end`
			`end`