diff options
Diffstat (limited to 'lib/arel/algebra')
| -rw-r--r-- | lib/arel/algebra/relations/relation.rb | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/lib/arel/algebra/relations/relation.rb b/lib/arel/algebra/relations/relation.rb index e848c8aa1c..4cd3f8e109 100644 --- a/lib/arel/algebra/relations/relation.rb +++ b/lib/arel/algebra/relations/relation.rb @@ -84,7 +84,8 @@ module Arel module AttributeAccessable def [](index) - case index + @cached_attributes ||= {} + @cached_attributes[index] ||= case index when Symbol, String find_attribute_matching_name(index) when Attribute, Expression @@ -96,7 +97,7 @@ module Arel end def find_attribute_matching_name(name) - attributes.detect { |a| a.named?(name) } + attributes.detect { |a| a.named?(name) } || Attribute.new(self, name) end def find_attribute_matching_attribute(attribute) |