reorganized call

Conflicts:

	doc/TODO
	lib/arel/relations/relation.rb
	lib/arel/relations/writes/delete.rb
	lib/arel/relations/writes/insert.rb
	lib/arel/relations/writes/update.rb
	lib/arel/session.rb
	spec/arel/unit/relations/delete_spec.rb
	spec/arel/unit/relations/insert_spec.rb
	spec/arel/unit/relations/relation_spec.rb
	spec/arel/unit/relations/update_spec.rb
	spec/arel/unit/session/session_spec.rb

5 files changed, 27 insertions, 13 deletions

diff --git a/lib/arel/relations/array.rb b/lib/arel/relations/array.rb
new file mode 100644
index 0000000000..dac65abbc2
--- /dev/null
+++ b/lib/arel/relations/array.rb
@@ -0,0 +1,19 @@
+module Arel
+  class Array < Relation
+    include Recursion::BaseCase
+
+    def initialize(array, attribute_names)
+      @array, @attribute_names = array, attribute_names
+    end
+
+    def attributes
+      @attributes ||= @attribute_names.collect do |name|
+        Attribute.new(self, name.to_sym)
+      end
+    end
+
+    def call(connection = nil)
+      @array.collect { |row| attributes.zip(row).to_hash }
+    end
+  end
+end
\ No newline at end of file
diff --git a/lib/arel/relations/relation.rb b/lib/arel/relations/relation.rb
index 5d2c336a15..ef295dfdd7 100644
--- a/lib/arel/relations/relation.rb
+++ b/lib/arel/relations/relation.rb
@@ -32,13 +32,8 @@ module Arel
       "IN"
     end
 
-    def call(connection = engine)
-      results = connection.execute(to_sql)
-      rows = []
-      results.each do |row|
-        rows << attributes.zip(row).to_hash
-      end
-      rows
+    def call
+      engine.read(self)
     end
 
     def bind(relation)
diff --git a/lib/arel/relations/writes/delete.rb b/lib/arel/relations/writes/delete.rb
index b1ff3bef27..0a04454e7f 100644
--- a/lib/arel/relations/writes/delete.rb
+++ b/lib/arel/relations/writes/delete.rb
@@ -12,8 +12,8 @@ module Arel
       ].compact.join("\n")
     end
 
-    def call(connection = engine)
-      connection.delete(to_sql)
+    def call
+      engine.delete(self)
     end
   end
 end
diff --git a/lib/arel/relations/writes/insert.rb b/lib/arel/relations/writes/insert.rb
index d579ad06d0..d05bd9cdc8 100644
--- a/lib/arel/relations/writes/insert.rb
+++ b/lib/arel/relations/writes/insert.rb
@@ -16,8 +16,8 @@ module Arel
       ].join("\n")
     end
 
-    def call(connection = engine)
-      connection.insert(to_sql)
+    def call
+      engine.create(self)
     end
   end
 end
diff --git a/lib/arel/relations/writes/update.rb b/lib/arel/relations/writes/update.rb
index 2e90de3a52..fd0aadb479 100644
--- a/lib/arel/relations/writes/update.rb
+++ b/lib/arel/relations/writes/update.rb
@@ -18,8 +18,8 @@ module Arel
       ].join("\n")
     end
 
-    def call(connection = engine)
-      connection.update(to_sql)
+    def call
+      engine.update(self)
     end
   end
 end