Add plural to Brainstem::DSL::Association

lib/brainstem/dsl/association.rb

@@ -11,6 +11,7 @@ def initialize(name, target_class, options)
         @name = name.to_s
         @target_class = target_class
         @options = options
+        @plural = plural
       end
 
       def description
@@ -25,6 +26,14 @@ def method_name
         end
       end
 
+      def plural
+        if options[:plural].present?
+          options[:plural]
+        else
+          name.singularize != name && name.pluralize == name
+        end
+      end
+
       def run_on(model, context, helper_instance = Object.new)
         if options[:lookup]
           run_on_with_lookup(model, context, helper_instance)

spec/brainstem/dsl/association_spec.rb

@@ -24,6 +24,33 @@
     end
   end
 
+  describe 'plural' do
+    context 'when `plural` is specified in the options' do
+      let(:options) { { plural: true } }
+
+      it 'returns the value specified in the plural key' do
+        expect(association.plural).to eq true
+      end
+    end
+
+    context 'when `plural` is not specified in the options' do
+      it 'delegates to ruby singularize and pluralize to guess if the association is plural or singular' do
+        class Dress
+
+        end
+
+        singular_association = Brainstem::DSL::Association.new('user', User, {})
+        weird_singular_association = Brainstem::DSL::Association.new('dress', Dress, {})
+        plural_association = Brainstem::DSL::Association.new('users', User, {})
+        weird_plural_association = Brainstem::DSL::Association.new('dresses', Dress, {})
+        expect(singular_association.plural).to eq false
+        expect(plural_association.plural).to eq true
+        expect(weird_singular_association.plural).to eq false
+        expect(weird_plural_association.plural).to eq true
+      end
+    end
+  end
+
   describe "#run_on" do
     let(:context) { { } }