method

add_lock!

rails latest stable - Class: ActiveRecord::ConnectionAdapters::DatabaseStatements

add_lock!(sql, options)

public

Appends a locking clause to an SQL statement. This method modifies the sql parameter.

  # SELECT * FROM suppliers FOR UPDATE
  add_lock! 'SELECT * FROM suppliers', :lock => true
  add_lock! 'SELECT * FROM suppliers', :lock => ' FOR UPDATE'

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 216
      def add_lock!(sql, options)
        case lock = options[:lock]
          when true;   sql << ' FOR UPDATE'
          when String; sql << " #{lock}"
        end
      end

add_lock!

Method deprecated or moved

Related methods