class Arel::SqlCompiler::MariaDbClusterPoolCompiler

Hook into arel to use the compiler used by the master connection.

Public Class Methods

new(relation) click to toggle source
# File lib/maria_db_cluster_pool/arel_compiler.rb, line 5
def self.new(relation)
  @compiler_classes ||= {}
  master_adapter = relation.engine.connection.master_connection.adapter_name
  compiler_class = @compiler_classes[master_adapter]
  unless compiler_class
    begin
      require "arel/engines/sql/compilers/#{master_adapter.downcase}_compiler"
    rescue LoadError
      begin
        # try to load an externally defined compiler, in case this adapter has defined the compiler on its own.
        require "#{master_adapter.downcase}/arel_compiler"
      rescue LoadError
        raise "#{master_adapter} is not supported by Arel."
      end
    end
    compiler_class = Arel::SqlCompiler.const_get("#{master_adapter}Compiler")
    @compiler_classes[master_adapter] = compiler_class
  end
  compiler_class.new(relation)
end