diff options
Diffstat (limited to 'lib/arel/table.rb')
-rw-r--r-- | lib/arel/table.rb | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/lib/arel/table.rb b/lib/arel/table.rb index 06bbe7b99e..d23245691b 100644 --- a/lib/arel/table.rb +++ b/lib/arel/table.rb @@ -88,8 +88,24 @@ module Arel end def [] name + return nil unless table_exists? + name = name.to_sym columns.find { |column| column.name == name } end + + private + def table_exists? + @table_exists ||= tables.key?(@name) || engine.connection.table_exists?(name) + end + + def tables + self.class.table_cache(@engine) + end + + @@table_cache = nil + def self.table_cache engine # :nodoc: + @@table_cache ||= Hash[engine.connection.tables.map { |x| [x,true] }] + end end end |