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| author | Emilio Tagua <miloops@gmail.com> | 2010-03-10 18:16:07 -0300 |
|---|---|---|
| committer | Emilio Tagua <miloops@gmail.com> | 2010-03-10 18:16:07 -0300 |
| commit | b706f690b611d647aae15a85caa19d167814ae3c (patch) | |
| tree | 05a17b2e937f894ea03f3fff535fd62cbc31a025 /lib/arel/algebra | |
| parent | c03d4bb8e4acac95961a1a9eb9578fa33a47da66 (diff) | |
| download | rails-b706f690b611d647aae15a85caa19d167814ae3c.tar.gz rails-b706f690b611d647aae15a85caa19d167814ae3c.tar.bz2 rails-b706f690b611d647aae15a85caa19d167814ae3c.zip | |
Arel doesn't has to know if a table or column exists.
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) |