3 files changed, 11 insertions, 11 deletions
diff --git a/lib/arel/relations/relation.rb b/lib/arel/relations/relation.rb
index d9ba9a108b..50110c7416 100644
--- a/lib/arel/relations/relation.rb
+++ b/lib/arel/relations/relation.rb
@@ -99,11 +99,11 @@ module Arel
         end
 
         def update(assignments)
-          session.update Update.new(self, assignments); self
+          session.update Update.new(self, assignments)
         end
 
         def delete
-          session.delete Deletion.new(self); self
+          session.delete Deletion.new(self)
         end
       end
       include Writable
diff --git a/lib/arel/relations/writes/delete.rb b/lib/arel/relations/writes/delete.rb
index 318a299b8b..b1ff3bef27 100644
--- a/lib/arel/relations/writes/delete.rb
+++ b/lib/arel/relations/writes/delete.rb
@@ -11,9 +11,9 @@ module Arel
         ("LIMIT #{taken}"                                     unless taken.blank?    ),
       ].compact.join("\n")
     end
-    
-    def call(connection = engine.connection)
+
+    def call(connection = engine)
       connection.delete(to_sql)
     end
   end
-end
-\ No newline at end of file
+end
diff --git a/lib/arel/relations/writes/update.rb b/lib/arel/relations/writes/update.rb
index 720b9d697d..3b43152ad6 100644
--- a/lib/arel/relations/writes/update.rb
+++ b/lib/arel/relations/writes/update.rb
@@ -2,7 +2,7 @@ module Arel
   class Update < Compound
     attributes :relation, :assignments
     deriving :==
-    
+
     def initialize(relation, assignments)
       @relation, @assignments = relation, assignments.bind(relation)
     end
@@ -11,15 +11,15 @@ module Arel
       [
         "UPDATE #{table_sql} SET",
         assignments.collect do |attribute, value|
-          "#{value.format(attribute)} = #{attribute.format(value)}"
+          "#{engine.quote_column_name(attribute.name)} = #{attribute.format(value)}"
         end.join(",\n"),
-        ("WHERE #{wheres.collect(&:to_sql).join('\n\tAND ')}"  unless wheres.blank?  ),
+        ("WHERE #{wheres.map(&:to_sql).join('\n\tAND ')}"  unless wheres.blank?  ),
         ("LIMIT #{taken}"                                      unless taken.blank?    )
       ].join("\n")
     end
-    
-    def call(connection = engine.connection)
+
+    def call(connection = engine)
       connection.update(to_sql)
     end
   end
-end
-\ No newline at end of file
+end