designs.rb in couchrest_model-2.0.0

- old
+ new

@@ -20,22 +20,41 @@
       extend ActiveSupport::Concern
 
 
       module ClassMethods
 
-        # Add views and other design document features
-        # to the current model.
-        def design(prefix = nil, &block)
+        # Define a Design Document associated with the current model.
+        #
+        # This class method supports several cool features that make it much
+        # easier to define design documents.
+        #
+        # Adding a prefix allows you to associate multiple design documents with the same
+        # model. This is useful if you'd like to split your designs into seperate
+        # use cases; one for regular search functions and a second for stats for example.
+        # 
+        #    # Create a design doc with id _design/Cats
+        #    design do
+        #      view :by_name
+        #    end
+        #
+        #    # Create a design doc with id _design/Cats_stats
+        #    design :stats do
+        #      view :by_age, :reduce => :stats
+        #    end
+        #
+        #
+        def design(*args, &block)
+          opts = prepare_design_options(*args)
 
           # Store ourselves a copy of this design spec incase any other model inherits.
-          (@_design_blocks ||= [ ]) << {:args => [prefix], :block => block}
+          (@_design_blocks ||= [ ]) << {:args => args, :block => block}
 
-          mapper = DesignMapper.new(self, prefix)
+          mapper = DesignMapper.new(self, opts[:prefix])
           mapper.instance_eval(&block) if block_given?
 
           # Create an 'all' view if no prefix and one has not been defined already
-          mapper.view(:all) if prefix.nil? and !mapper.design_doc.has_view?(:all)
+          mapper.view(:all) if opts[:prefix].nil? and !mapper.design_doc.has_view?(:all)
         end
 
         def inherited(model)
           super
 
@@ -66,78 +85,26 @@
 
         def design_docs
           @_design_docs ||= []
         end
 
-      end
+        private
 
-      # Map method calls defined in a design block to actions
-      # in the Design Document.
-      class DesignMapper
-
-        # Basic mapper attributes
-        attr_accessor :model, :method, :prefix
-
-        # Temporary variable storing the design doc
-        attr_accessor :design_doc
-
-        def initialize(model, prefix = nil)
-          self.model  = model
-          self.prefix = prefix
-          self.method = Design.method_name(prefix)
-
-          create_model_design_doc_reader
-          self.design_doc = model.send(method) || assign_model_design_doc
+        def prepare_design_options(*args)
+          options = {}
+          if !args.first.is_a?(Hash)
+            options[:prefix] = args.shift
+          end
+          options.merge(args.last) unless args.empty?
+          prepare_source_paths(options)
+          options
         end
 
-        def disable_auto_update
-          design_doc.auto_update = false
+        def prepare_source_paths(options)
+          
         end
 
-        def enable_auto_update
-          design_doc.auto_update = true
-        end
-
-        # Add the specified view to the design doc the definition was made in
-        # and create quick access methods in the model.
-        def view(name, opts = {})
-          design_doc.create_view(name, opts)
-        end
-
-        # Really simple design function that allows a filter
-        # to be added. Filters are simple functions used when listening
-        # to the _changes feed.
-        #
-        # No methods are created here, the design is simply updated.
-        # See the CouchDB API for more information on how to use this.
-        def filter(name, function)
-          design_doc.create_filter(name, function)
-        end
-
-        # Convenience wrapper to access model's type key option.
-        def model_type_key
-          model.model_type_key
-        end
-
-        protected
-
-        # Create accessor in model and assign a new design doc.
-        # New design doc is returned ready to use.
-        def create_model_design_doc_reader
-          model.instance_eval "def #{method}; @#{method}; end"
-        end
-
-        def assign_model_design_doc
-          doc = Design.new(model, prefix)
-          model.instance_variable_set("@#{method}", doc)
-          model.design_docs << doc
-
-          # Set defaults
-          doc.auto_update = model.auto_update_design_doc
-
-          doc
-        end
-
       end
+
     end
   end
 end