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module Arel
module SqlCompiler
# Hook into arel to use the compiler used by the master connection.
class Seamless_Database_PoolCompiler < GenericCompiler
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 LoadError.new("#{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
end
end
end
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