ruby: Older Ubuntus don't have seprate activerecord package

ruby/manifests/init.pp

@@ -27,17 +27,31 @@ class ruby::rubygems {
 #
 class ruby::activerecord {
 
-    if $::operatingsystem in ["CentOS","RedHat"] and versioncmp($::operatingsystemrelease, "6") >= 0 {
+    case $::operatingsystem {
+        "centos","redhat": {
             require yum::repo::puppetlabs::dependencies
+            $package = "rubygem-activerecord"
+        }
+        "debian": {
+            $package = regsubst($::rubyversion, '^([0-9]+\.[0-9]+)\..*', 'libactiverecord-ruby\1')
+        }
+        "ubuntu": {
+            if versioncmp($::operatingsystemrelease, "12.04") >= 0 {
+                $package = regsubst($::rubyversion, '^([0-9]+\.[0-9]+)\..*', 'libactiverecord-ruby\1')
+            } else {
+                $package = undef
+            }
+        }
+        default: {
+            $package = "rubygem-activerecord"
+        }
     }
 
+    if $package {
         package { "rubygem-activerecord":
             ensure => installed,
-        name   => $::operatingsystem ? {
+            name   => $package,
-            "debian" => regsubst($::rubyversion, '^([0-9]+\.[0-9]+)\..*', 'libactiverecord-ruby\1'),
+        }
-            "ubuntu" => regsubst($::rubyversion, '^([0-9]+\.[0-9]+)\..*', 'libactiverecord-ruby\1'),
-            default  => "rubygem-activerecord",
-        },
     }
 
 }