1 files changed, 78 insertions, 0 deletions
diff --git a/railties/lib/rails/generators/active_model.rb b/railties/lib/rails/generators/active_model.rb
new file mode 100644
index 0000000000..6183944bb0
--- /dev/null
+++ b/railties/lib/rails/generators/active_model.rb
@@ -0,0 +1,78 @@
+module Rails
+  module Generators
+    # ActiveModel is a class to be implemented by each ORM to allow Rails to
+    # generate customized controller code.
+    #
+    # The API has the same methods as ActiveRecord, but each method returns a
+    # string that matches the ORM API.
+    #
+    # For example:
+    #
+    #   ActiveRecord::Generators::ActiveModel.find(Foo, "params[:id]")
+    #   # => "Foo.find(params[:id])"
+    #
+    #   DataMapper::Generators::ActiveModel.find(Foo, "params[:id]")
+    #   # => "Foo.get(params[:id])"
+    #
+    # On initialization, the ActiveModel accepts the instance name that will
+    # receive the calls:
+    #
+    #   builder = ActiveRecord::Generators::ActiveModel.new "@foo"
+    #   builder.save # => "@foo.save"
+    #
+    # The only exception in ActiveModel for ActiveRecord is the use of self.build
+    # instead of self.new.
+    #
+    class ActiveModel
+      attr_reader :name
+
+      def initialize(name)
+        @name = name
+      end
+
+      # GET index
+      def self.all(klass)
+        "#{klass}.all"
+      end
+
+      # GET show
+      # GET edit
+      # PATCH/PUT update
+      # DELETE destroy
+      def self.find(klass, params=nil)
+        "#{klass}.find(#{params})"
+      end
+
+      # GET new
+      # POST create
+      def self.build(klass, params=nil)
+        if params
+          "#{klass}.new(#{params})"
+        else
+          "#{klass}.new"
+        end
+      end
+
+      # POST create
+      def save
+        "#{name}.save"
+      end
+
+      # PATCH/PUT update
+      def update(params=nil)
+        "#{name}.update(#{params})"
+      end
+
+      # POST create
+      # PATCH/PUT update
+      def errors
+        "#{name}.errors"
+      end
+
+      # DELETE destroy
+      def destroy
+        "#{name}.destroy"
+      end
+    end
+  end
+end