Make Observer generator agnostic.

railties/lib/generators.rb

@@ -12,6 +12,7 @@ require 'rails/version' unless defined?(Rails::VERSION)
 
 require 'generators/base'
 require 'generators/named_base'
+require 'generators/active_record'
 require 'generators/erb'
 require 'generators/test_unit'
 

railties/lib/generators/active_record.rb

@@ -0,0 +1,8 @@
+require 'generators/named_base'
+
+module ActiveRecord
+  module Generators
+    class Base < Rails::Generators::NamedBase
+    end
+  end
+end

railties/lib/generators/active_record/observer/observer_generator.rb

@@ -0,0 +1,11 @@
+module ActiveRecord
+  module Generators
+    class ObserverGenerator < Base
+      check_class_collision :suffix => "Observer"
+
+      def create_observer_file
+        template 'observer.rb', File.join('app/models', class_path, "#{file_name}_observer.rb")
+      end
+    end
+  end
+end

railties/lib/generators/base.rb

@@ -3,9 +3,10 @@ require 'generators/actions'
 module Rails
   module Generators
     DEFAULTS = {
+      :orm => 'active_record',
+      :helper => true,
       :test_framework => 'test_unit',
-      :template_engine => 'erb',
-      :helper => true
+      :template_engine => 'erb'
     }
 
     class Error < Thor::Error
@@ -41,7 +42,7 @@ module Rails
       #
       def self.namespace(name=nil)
         return super if name
-        @namespace ||= "#{base_name}:generators:#{generator_name}"
+        @namespace ||= super.sub(/_generator$/, '')
       end
 
       # Invoke a generator based on the value supplied by the user to the
@@ -207,7 +208,7 @@ module Rails
         def self.generator_name
           @generator_name ||= begin
             klass_name = self.name.split('::').last
-            klass_name.gsub!(/Generator$/, '')
+            klass_name.sub!(/Generator$/, '')
             klass_name.underscore
           end
         end

railties/lib/generators/rails/observer/USAGE

@@ -2,12 +2,11 @@ Description:
     Stubs out a new observer. Pass the observer name, either CamelCased or
     under_scored, as an argument.
 
-    The generator creates an observer class in app/models and invokes the
-    configured test framework.
+    This generator only invokes your ORM and test framework generators.
 
 Example:
     `./script/generate observer Account`
 
-    creates an Account observer and invoke the test framework:
+    For ActiveRecord and TestUnit it creates:
         Observer:   app/models/account_observer.rb
         TestUnit:   test/unit/account_observer_test.rb

railties/lib/generators/rails/observer/observer_generator.rb

@@ -1,13 +1,7 @@
 module Rails
   module Generators
     class ObserverGenerator < NamedBase
-      check_class_collision :suffix => "Observer"
-
-      def create_observer_file
-        template 'observer.rb', File.join('app/models', class_path, "#{file_name}_observer.rb")
-      end
-
-      invoke_for :test_framework
+      invoke_for :orm, :test_framework
     end
   end
 end

railties/test/generators/observer_generator_test.rb

@@ -1,5 +1,6 @@
 require 'abstract_unit'
 require 'generators/generators_test_helper'
+require 'generators/active_record/observer/observer_generator'
 require 'generators/rails/observer/observer_generator'
 require 'generators/test_unit/observer/observer_generator'