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rails--rails/activerecord/lib/arel/delete_manager.rb
ignacio chiazzo 989d53ba3b Use nested queries when doing DELETE and GROUP_BY and HAVINAG clauses present.
MySQL does not support GROUP_BY and HAVING on UPDATE, we need to use a Subquery.

Co-authored-by: Rafael Mendonça França <rafael@franca.dev>
2021-11-01 21:39:20 -04:00

32 lines
657 B
Ruby

# frozen_string_literal: true
module Arel # :nodoc: all
class DeleteManager < Arel::TreeManager
include TreeManager::StatementMethods
def initialize(table = nil)
@ast = Nodes::DeleteStatement.new(table)
end
def from(relation)
@ast.relation = relation
self
end
def group(columns)
columns.each do |column|
column = Nodes::SqlLiteral.new(column) if String === column
column = Nodes::SqlLiteral.new(column.to_s) if Symbol === column
@ast.groups.push Nodes::Group.new column
end
self
end
def having(expr)
@ast.havings << expr
self
end
end
end