Adding configuration support and changing 'couchrest-type' key to 'model' along with config options

lib/couchrest/model/base.rb

@@ -4,6 +4,7 @@ module CouchRest
 
       extend ActiveModel::Naming
 
+      include CouchRest::Model::Configuration
       include CouchRest::Model::Persistence
       include CouchRest::Model::Callbacks
       include CouchRest::Model::DocumentQueries    
@@ -37,7 +38,7 @@ module CouchRest
       
       # Accessors
       attr_accessor :casted_by
-      
+
 
       # Instantiate a new CouchRest::Model::Base by preparing all properties
       # using the provided document hash.
@@ -50,7 +51,7 @@ module CouchRest
         prepare_all_attributes(doc, options)
         super(doc)
         unless self['_id'] && self['_rev']
-          self['couchrest-type'] = self.class.to_s
+          self[self.model_type_key] = self.class.to_s
         end
         after_initialize if respond_to?(:after_initialize)
       end

lib/couchrest/model/configuration.rb

@@ -0,0 +1,49 @@
+module CouchRest
+
+  # CouchRest Model Configuration support, stolen from Carrierwave by jnicklas
+  #    http://github.com/jnicklas/carrierwave/blob/master/lib/carrierwave/uploader/configuration.rb
+
+  module Model
+    module Configuration
+      extend ActiveSupport::Concern
+
+      included do
+        add_config :model_type_key
+        
+        configure do |config|
+          config.model_type_key = 'model'
+        end
+      end
+
+      module ClassMethods
+
+        def add_config(name)
+          class_eval <<-RUBY, __FILE__, __LINE__ + 1
+            def self.#{name}(value=nil)
+              @#{name} = value if value
+              return @#{name} if self.object_id == #{self.object_id} || defined?(@#{name})
+              name = superclass.#{name}
+              return nil if name.nil? && !instance_variable_defined?("@#{name}")
+              @#{name} = name && !name.is_a?(Module) && !name.is_a?(Symbol) && !name.is_a?(Numeric) && !name.is_a?(TrueClass) && !name.is_a?(FalseClass) ? name.dup : name
+            end
+
+            def self.#{name}=(value)
+              @#{name} = value
+            end
+
+            def #{name}
+              self.class.#{name}
+            end
+          RUBY
+        end
+
+        def configure
+          yield self
+        end
+      end
+
+    end
+  end
+end
+
+

lib/couchrest/model/design_doc.rb

@@ -31,7 +31,7 @@ module CouchRest
             "views" => {
               'all' => {
                 'map' => "function(doc) {
-                  if (doc['couchrest-type'] == '#{self.to_s}') {
+                  if (doc['#{self.model_type_key}'] == '#{self.to_s}') {
                     emit(doc['_id'],1);
                   }
                 }"

lib/couchrest/model/document_queries.rb

@@ -8,21 +8,21 @@ module CouchRest
       
       module ClassMethods
         
-        # Load all documents that have the "couchrest-type" field equal to the
+        # Load all documents that have the model_type_key's field equal to the
         # name of the current class. Take the standard set of
         # CouchRest::Database#view options.
         def all(opts = {}, &block)
           view(:all, opts, &block)
         end
         
-        # Returns the number of documents that have the "couchrest-type" field
+        # Returns the number of documents that have the model_type_key's field
         # equal to the name of the current class. Takes the standard set of 
         # CouchRest::Database#view options
         def count(opts = {}, &block)
           all({:raw => true, :limit => 0}.merge(opts), &block)['total_rows']
         end
         
-        # Load the first document that have the "couchrest-type" field equal to
+        # Load the first document that have the model_type_key's field equal to
         # the name of the current class.
         #
         # ==== Returns

lib/couchrest/model/persistence.rb

@@ -97,7 +97,7 @@ module CouchRest
         # ==== Returns
         #  a document instance
         def create_from_database(doc = {})
-          base = (doc['couchrest-type'].blank? || doc['couchrest-type'] == self.to_s) ? self : doc['couchrest-type'].constantize
+          base = (doc[model_type_key].blank? || doc[model_type_key] == self.to_s) ? self : doc[model_type_key].constantize
           base.new(doc, :directly_set_attributes => true)      
         end
 

lib/couchrest/model/views.rb

@@ -23,7 +23,7 @@ module CouchRest
         #     view_by :tags,                                                
         #       :map =>                                                     
         #         "function(doc) {                                          
-        #           if (doc['couchrest-type'] == 'Post' && doc.tags) {                   
+        #           if (doc['model'] == 'Post' && doc.tags) {                   
         #             doc.tags.forEach(function(tag){                       
         #               emit(doc.tag, 1);                                   
         #             });                                                   
@@ -39,7 +39,7 @@ module CouchRest
         # function:
         #  
         #   function(doc) {
-        #     if (doc['couchrest-type'] == 'Post' && doc.date) {
+        #     if (doc['model'] == 'Post' && doc.date) {
         #       emit(doc.date, null);
         #     }
         #   }
@@ -77,7 +77,7 @@ module CouchRest
           ducktype = opts.delete(:ducktype)
           unless ducktype || opts[:map]
             opts[:guards] ||= []
-            opts[:guards].push "(doc['couchrest-type'] == '#{self.to_s}')"
+            opts[:guards].push "(doc['#{model_type_key}'] == '#{self.to_s}')"
           end
           keys.push opts
           design_doc.view_by(*keys)