up: enable pass metadata to create method

lib/rating/models/rating/extension.rb

@@ -5,8 +5,8 @@ module Rating
     extend ActiveSupport::Concern
 
     included do
-      def rate(resource, value, author: self, scope: nil)
-        Rate.create author: author, resource: resource, scopeable: scope, value: value
+      def rate(resource, value, author: self, metadata: {}, scope: nil)
+        Rate.create author: author, metadata: metadata, resource: resource, scopeable: scope, value: value
       end
 
       def rate_for(resource, scope: nil)

lib/rating/models/rating/rate.rb

@@ -18,7 +18,7 @@ module Rating
       scope:          %i[author_type resource_id resource_type scopeable_id scopeable_type]
     }
 
-    def self.create(author:, resource:, scopeable: nil, value:)
+    def self.create(author:, metadata:, resource:, scopeable: nil, value:)
       record = find_or_initialize_by(author: author, resource: resource, scopeable: scopeable)
 
       return record if record.persisted? && value == record.value

spec/models/extension/rate_spec.rb

@@ -8,7 +8,9 @@ RSpec.describe Rating::Extension, ':rate' do
 
   context 'with no scopeable' do
     it 'delegates to rate object' do
-      expect(Rating::Rate).to receive(:create).with author: author, resource: article, scopeable: nil, value: 3
+      expect(Rating::Rate).to receive(:create).with(
+        author: author, metadata: {}, resource: article, scopeable: nil, value: 3
+      )
 
       author.rate article, 3
     end
@@ -18,9 +20,33 @@ RSpec.describe Rating::Extension, ':rate' do
     let!(:category) { build :category }
 
     it 'delegates to rate object' do
-      expect(Rating::Rate).to receive(:create).with author: author, resource: article, scopeable: category, value: 3
+      expect(Rating::Rate).to receive(:create).with(
+        author: author, metadata: {}, resource: article, scopeable: category, value: 3
+      )
 
       author.rate article, 3, scope: category
     end
   end
+
+  context 'with no metadata' do
+    it 'delegates an empty hash to rate object' do
+      expect(Rating::Rate).to receive(:create).with(
+        author: author, resource: article, metadata: {}, scopeable: nil, value: 3
+      )
+
+      author.rate article, 3
+    end
+  end
+
+  context 'with metadata' do
+    let!(:category) { build :category }
+
+    it 'delegates to rate object' do
+      expect(Rating::Rate).to receive(:create).with(
+        author: author, metadata: { comment: 'comment' }, resource: article, scopeable: nil, value: 3
+      )
+
+      author.rate article, 3, metadata: { comment: 'comment' }
+    end
+  end
 end