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

history.txt

@@ -1,6 +1,8 @@
 == Next Version
 
 * Major enhancements
+  * IMPORTANT: Model's class name key changed from 'couchrest-type' to 'model'
+  * Support for configuration module and "model_type_key" option for overriding model's type key
 
 * Minor enhancements
   * Fixing find("") issue (thanks epochwolf)

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    
@@ -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)

lib/couchrest_model.rb

@@ -48,6 +48,7 @@ require "couchrest/model/collection"
 require "couchrest/model/attribute_protection"
 require "couchrest/model/attributes"
 require "couchrest/model/associations"
+require "couchrest/model/configuration"
 
 # Monkey patches applied to couchrest
 require "couchrest/model/support/couchrest"

spec/couchrest/attribute_protection_spec.rb

@@ -150,7 +150,7 @@ describe "Model Attributes" do
     it "Base#all should not strip protected attributes" do
       # all creates a CollectionProxy
       docs = WithProtected.all(:key => @user.id)
-      docs.size.should == 1
+      docs.length.should == 1
       reloaded = docs.first
       verify_attrs reloaded
     end

spec/couchrest/base_spec.rb

@@ -36,7 +36,7 @@ describe "Model Base" do
 
     it "should not failed on a nil value in argument" do
       @obj = Basic.new(nil)
-      @obj.should == { 'couchrest-type' => 'Basic' }
+      @obj.should_not be_nil
     end
   end
  

spec/couchrest/configuration_spec.rb

@@ -0,0 +1,87 @@
+# encoding: utf-8
+require File.expand_path('../../spec_helper', __FILE__)
+require File.join(FIXTURE_PATH, 'more', 'cat')
+
+describe CouchRest::Model::Base do
+
+  before do
+    @class = Class.new(CouchRest::Model::Base)
+  end
+
+  describe '.configure' do
+    it "should set a configuration parameter" do
+      @class.add_config :foo_bar
+      @class.configure do |config|
+        config.foo_bar = 'monkey'
+      end
+      @class.foo_bar.should == 'monkey'
+    end
+  end
+
+  describe '.add_config' do
+    
+    it "should add a class level accessor" do
+      @class.add_config :foo_bar
+      @class.foo_bar = 'foo'
+      @class.foo_bar.should == 'foo'
+    end
+    
+    ['foo', :foo, 45, ['foo', :bar]].each do |val|
+      it "should be inheritable for a #{val.class}" do
+        @class.add_config :foo_bar
+        @child_class = Class.new(@class)
+
+        @class.foo_bar = val
+        @class.foo_bar.should == val
+        @child_class.foo_bar.should == val
+
+        @child_class.foo_bar = "bar"
+        @child_class.foo_bar.should == "bar"
+
+        @class.foo_bar.should == val
+      end
+    end
+    
+    
+    it "should add an instance level accessor" do
+      @class.add_config :foo_bar
+      @class.foo_bar = 'foo'
+      @class.new.foo_bar.should == 'foo'
+    end
+    
+    it "should add a convenient in-class setter" do
+      @class.add_config :foo_bar
+      @class.foo_bar "monkey"
+      @class.foo_bar.should == "monkey"
+    end
+  end
+
+  describe "General examples" do
+
+    before(:all) do
+      @default_model_key = 'model'
+    end
+
+    it "should set default configuration options on Model::Base" do
+      CouchRest::Model::Base.model_type_key.should eql(@default_model_key)
+    end
+
+    it "should provide options from instance" do
+      cat = Cat.new
+      cat.model_type_key.should eql(@default_model_key)
+    end
+
+    it "should be possible to override on class using configure method" do
+      Cat.instance_eval do
+        configure do |config|
+          config.model_type_key = 'cat-type'
+        end
+      end
+      CouchRest::Model::Base.model_type_key.should eql(@default_model_key)
+      Cat.model_type_key.should eql('cat-type')
+      cat = Cat.new
+      cat.model_type_key.should eql('cat-type')
+    end
+  end
+
+end

spec/couchrest/persistence_spec.rb

@@ -25,7 +25,7 @@ describe "Model Persistence" do
     end
 
     it "should instantialize document of different type" do
-      doc = Article.create_from_database({'_id' => 'testitem2', '_rev' => 123, 'couchrest-type' => 'WithTemplateAndUniqueID', 'name' => 'my test'})
+      doc = Article.create_from_database({'_id' => 'testitem2', '_rev' => 123, Article.model_type_key => 'WithTemplateAndUniqueID', 'name' => 'my test'})
       doc.class.should eql(WithTemplateAndUniqueID)
     end
 
@@ -114,7 +114,7 @@ describe "Model Persistence" do
     end
     
     it "should set the type" do
-      @sobj['couchrest-type'].should == 'Basic'
+      @sobj[@sobj.model_type_key].should == 'Basic'
     end
 
     it "should accept true or false on save for validation" do

spec/couchrest/subclass_spec.rb

@@ -92,8 +92,8 @@ describe "Subclassing a Model" do
     OnlineCourse.design_doc['views'].keys.should_not include('by_title')
   end
   
-  it "should have an all view with a guard clause for couchrest-type == subclass name in the map function" do
-    OnlineCourse.design_doc['views']['all']['map'].should =~ /if \(doc\['couchrest-type'\] == 'OnlineCourse'\)/
+  it "should have an all view with a guard clause for model == subclass name in the map function" do
+    OnlineCourse.design_doc['views']['all']['map'].should =~ /if \(doc\['model'\] == 'OnlineCourse'\)/
   end
 end
 

spec/fixtures/more/article.rb

@@ -9,7 +9,7 @@ class Article < CouchRest::Model::Base
   view_by :tags,
     :map => 
       "function(doc) {
-        if (doc['couchrest-type'] == 'Article' && doc.tags) {
+        if (doc['#{model_type_key}'] == 'Article' && doc.tags) {
           doc.tags.forEach(function(tag){
             emit(tag, 1);
           });