update manager is working

3 files changed, 10 insertions, 1 deletions

diff --git a/lib/arel/nodes/update_statement.rb b/lib/arel/nodes/update_statement.rb
index 66996f11a3..3df54bb3a9 100644
--- a/lib/arel/nodes/update_statement.rb
+++ b/lib/arel/nodes/update_statement.rb
@@ -1,11 +1,12 @@
 module Arel
   module Nodes
     class UpdateStatement
-      attr_accessor :relation, :wheres
+      attr_accessor :relation, :wheres, :values
 
       def initialize
         @relation = nil
         @wheres   = []
+        @values   = nil
       end
     end
   end
diff --git a/lib/arel/update_manager.rb b/lib/arel/update_manager.rb
index 3af73d2962..cc2f973842 100644
--- a/lib/arel/update_manager.rb
+++ b/lib/arel/update_manager.rb
@@ -16,5 +16,10 @@ module Arel
       @head.wheres << expr
       self
     end
+
+    def set values
+      @head.values = values
+      self
+    end
   end
 end
diff --git a/lib/arel/visitors/to_sql.rb b/lib/arel/visitors/to_sql.rb
index 41d1299948..9a9dd20d52 100644
--- a/lib/arel/visitors/to_sql.rb
+++ b/lib/arel/visitors/to_sql.rb
@@ -15,6 +15,9 @@ module Arel
       def visit_Arel_Nodes_UpdateStatement o
         [
           "UPDATE #{visit o.relation}",
+          ("SET #{o.values.map { |column,value|
+              "#{quote_column_name(column.name)} = #{quote visit value}"
+            }.join ', '}" if o.values),
           ("WHERE #{o.wheres.map { |x| visit x }.join ' AND '}" unless o.wheres.empty?)
         ].compact.join ' '
       end