jasiek

diff --git a/app/models/sample.rb b/app/models/sample.rb
new file mode 100644
index 0000000..7d523a9
--- /dev/null
+++ b/app/models/sample.rb
@@ -0,0 +1,3 @@
+class Sample < ActiveRecord::Base
+      validates_presence_of :value
+end
diff --git a/db/migrate/20090522160717_create_samples.rb b/db/migrate/20090522160717_create_samples.rb