adding first node

3 files changed, 19 insertions, 3 deletions

diff --git a/lib/arel/attributes/attribute.rb b/lib/arel/attributes/attribute.rb
index b83a32bee7..fdc64d62e0 100644
--- a/lib/arel/attributes/attribute.rb
+++ b/lib/arel/attributes/attribute.rb
@@ -1,13 +1,16 @@
 module Arel
   module Attributes
     class Attribute < Struct.new :relation, :name, :column
+      def eq other
+        Nodes::Equality.new self, other
+      end
     end
 
-    class String < Attribute; end
-    class Time < Attribute; end
+    class String  < Attribute; end
+    class Time    < Attribute; end
     class Boolean < Attribute; end
     class Decimal < Attribute; end
-    class Float < Attribute; end
+    class Float   < Attribute; end
     class Integer < Attribute; end
   end
 end
diff --git a/lib/arel/nodes.rb b/lib/arel/nodes.rb
new file mode 100644
index 0000000000..855d8cf236
--- /dev/null
+++ b/lib/arel/nodes.rb
@@ -0,0 +1 @@
+require 'arel/nodes/equality'
diff --git a/lib/arel/nodes/equality.rb b/lib/arel/nodes/equality.rb
new file mode 100644
index 0000000000..11383b1d89
--- /dev/null
+++ b/lib/arel/nodes/equality.rb
@@ -0,0 +1,12 @@
+module Arel
+  module Nodes
+    class Equality
+      attr_accessor :left, :right
+
+      def initialize left, right
+        @left  = left
+        @right = right
+      end
+    end
+  end
+end