basic implementation of in memory insertions

Conflicts:

	lib/arel/engines/memory/relations.rb

5 files changed, 16 insertions, 1 deletions

diff --git a/lib/arel/algebra/relations/relation.rb b/lib/arel/algebra/relations/relation.rb
index c38ab0e9c5..9fdac26528 100644
--- a/lib/arel/algebra/relations/relation.rb
+++ b/lib/arel/algebra/relations/relation.rb
@@ -57,7 +57,7 @@ module Arel
 
       module Writable
         def insert(record)
-          session.create Insert.new(self, record); self
+          session.create Insert.new(self, record)
         end
 
         def update(assignments)
diff --git a/lib/arel/engines/memory/engine.rb b/lib/arel/engines/memory/engine.rb
index 67a084f2cd..c8f79c9d57 100644
--- a/lib/arel/engines/memory/engine.rb
+++ b/lib/arel/engines/memory/engine.rb
@@ -5,6 +5,10 @@ module Arel
         def read(relation)
           relation.eval
         end
+        
+        def create(relation)
+          relation.eval
+        end
       end
       include CRUD
     end
diff --git a/lib/arel/engines/memory/relations.rb b/lib/arel/engines/memory/relations.rb
index 1b009537b9..c67af2d63b 100644
--- a/lib/arel/engines/memory/relations.rb
+++ b/lib/arel/engines/memory/relations.rb
@@ -1,4 +1,5 @@
 require 'arel/engines/memory/relations/array'
 require 'arel/engines/memory/relations/operations'
+require 'arel/engines/memory/relations/writes'
 require 'arel/engines/memory/relations/compound'
 
diff --git a/lib/arel/engines/memory/relations/writes.rb b/lib/arel/engines/memory/relations/writes.rb
new file mode 100644
index 0000000000..fa8b84a32c
--- /dev/null
+++ b/lib/arel/engines/memory/relations/writes.rb
@@ -0,0 +1,7 @@
+module Arel
+  class Insert < Compound
+    def eval
+      unoperated_rows + [Row.new(self, record.values.collect(&:value))]  
+    end
+  end
+end
\ No newline at end of file
diff --git a/lib/arel/session.rb b/lib/arel/session.rb
index cf04e8a93a..921ad0a7ac 100644
--- a/lib/arel/session.rb
+++ b/lib/arel/session.rb
@@ -24,6 +24,7 @@ module Arel
     module CRUD
       def create(insert)
         insert.call
+        insert
       end
 
       def read(select)
@@ -34,10 +35,12 @@ module Arel
 
       def update(update)
         update.call
+        update
       end
 
       def delete(delete)
         delete.call
+        delete
       end
     end
     include CRUD