From 188fc7a46456bd3e5ebdb09ef8a753d7a34a6af5 Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Tue, 14 Sep 2010 15:20:24 -0700
Subject: refactoring expressions to a module

---
 lib/arel/attributes/attribute.rb | 22 ++--------------------
 lib/arel/expressions.rb          | 23 +++++++++++++++++++++++
 lib/arel/nodes/sql_literal.rb    | 12 +-----------
 3 files changed, 26 insertions(+), 31 deletions(-)
 create mode 100644 lib/arel/expressions.rb

(limited to 'lib/arel')

diff --git a/lib/arel/attributes/attribute.rb b/lib/arel/attributes/attribute.rb
index 34c1f45ba6..28493d5cba 100644
--- a/lib/arel/attributes/attribute.rb
+++ b/lib/arel/attributes/attribute.rb
@@ -1,6 +1,8 @@
 module Arel
   module Attributes
     class Attribute < Struct.new :relation, :name, :column
+      include Arel::Expressions
+
       def not_eq other
         Nodes::NotEqual.new self, other
       end
@@ -13,26 +15,6 @@ module Arel
         Nodes::In.new self, other
       end
 
-      def count distinct = false
-        Nodes::Count.new [self], distinct
-      end
-
-      def sum
-        Nodes::Sum.new [self], Nodes::SqlLiteral.new('sum_id')
-      end
-
-      def maximum
-        Nodes::Max.new [self], Nodes::SqlLiteral.new('max_id')
-      end
-
-      def minimum
-        Nodes::Min.new [self], Nodes::SqlLiteral.new('min_id')
-      end
-
-      def average
-        Nodes::Avg.new [self], Nodes::SqlLiteral.new('avg_id')
-      end
-
       def gteq right
         Nodes::GreaterThanOrEqual.new self, right
       end
diff --git a/lib/arel/expressions.rb b/lib/arel/expressions.rb
new file mode 100644
index 0000000000..d1fbfd83d9
--- /dev/null
+++ b/lib/arel/expressions.rb
@@ -0,0 +1,23 @@
+module Arel
+  module Expressions
+    def count distinct = false
+      Nodes::Count.new [self], distinct
+    end
+
+    def sum
+      Nodes::Sum.new [self], Nodes::SqlLiteral.new('sum_id')
+    end
+
+    def maximum
+      Nodes::Max.new [self], Nodes::SqlLiteral.new('max_id')
+    end
+
+    def minimum
+      Nodes::Min.new [self], Nodes::SqlLiteral.new('min_id')
+    end
+
+    def average
+      Nodes::Avg.new [self], Nodes::SqlLiteral.new('avg_id')
+    end
+  end
+end
diff --git a/lib/arel/nodes/sql_literal.rb b/lib/arel/nodes/sql_literal.rb
index 7299fb1d45..e5918620d9 100644
--- a/lib/arel/nodes/sql_literal.rb
+++ b/lib/arel/nodes/sql_literal.rb
@@ -1,17 +1,7 @@
 module Arel
   module Nodes
     class SqlLiteral < String
-      def count distinct = false
-        Count.new [self], distinct
-      end
-
-      def sum
-        Nodes::Sum.new [self], Nodes::SqlLiteral.new('sum_id')
-      end
-
-      def maximum
-        Nodes::Max.new [self], Nodes::SqlLiteral.new('max_id')
-      end
+      include Arel::Expressions
     end
   end
 end
-- 
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