Fix OPTIONS regression

lib/grape/api.rb

@@ -561,31 +561,29 @@ def cascade?
     # cannot handle.
     def add_head_not_allowed_methods_and_options_methods
       allowed_methods = Hash.new { |h, k| h[k] = [] }
-      resources = self.class.endpoints.map do |endpoint|
-        if endpoint.options[:app] && endpoint.options[:app].respond_to?(:endpoints)
-          endpoint.options[:app].endpoints.map(&:routes)
-        else
-          endpoint.routes
+      self.class.endpoints.each do |endpoint|
+        app = endpoint.endpoints ? endpoint.options[:app] : self.class
+        (endpoint.endpoints || [endpoint]).each do |e|
+          e.options[:path].each do |path|
+            allowed_methods[[app, path]] |= e.options[:method]
+          end
         end
       end
-      resources.flatten.each do |route|
-        allowed_methods[route.route_path] << route.route_method
-      end
-      allowed_methods.each do |path, methods|
+      allowed_methods.each do |(app, path), methods|
         if methods.include?('GET') && !methods.include?('HEAD') && !self.class.settings[:do_not_route_head]
           methods = methods | ['HEAD']
         end
         allow_header = (['OPTIONS'] | methods).join(', ')
-        if methods.include?('OPTIONS') || !self.class.settings[:do_not_route_options]
-          self.class.options(path, {}) do
+        if !methods.include?('OPTIONS') && !self.class.settings[:do_not_route_options]
+          app.options(path, {}) do
             header 'Allow', allow_header
             status 204
             ''
           end
         end
         not_allowed_methods = %w(GET PUT POST DELETE PATCH HEAD) - methods
         not_allowed_methods << 'OPTIONS' if self.class.settings[:do_not_route_options]
-        self.class.route(not_allowed_methods, path) do
+        app.route(not_allowed_methods, path) do
           header 'Allow', allow_header
           status 405
           ''

lib/grape/endpoint.rb

@@ -362,8 +362,6 @@ def route
       env["rack.routing_args"][:route_info]
     end
 
-    protected
-
     # Return the collection of endpoints within this endpoint.
     # This is the case when an Grape::API mounts another Grape::API.
     def endpoints
@@ -374,6 +372,8 @@ def endpoints
       end
     end
 
+    protected
+
     def run(env)
       @env = env
       @header = {}

spec/grape/api_spec.rb

@@ -2101,6 +2101,38 @@ def self.call(object, env)
         last_response.body.should == "play"
       end
 
+      it 'responds to options' do
+        subject.namespace :apples do
+          app = Class.new(Grape::API)
+          app.get('/colour') do
+            "red"
+          end
+          mount app
+        end
+        get '/apples/colour'
+        last_response.status.should eql 200
+        last_response.body.should == 'red'
+        options '/apples/colour'
+        last_response.status.should eql 204
+      end
+
+      it 'responds to options with versioning' do
+        subject.version 'v1', using: :path
+        subject.namespace :apples do
+          app = Class.new(Grape::API)
+          app.get('/colour') do
+            "red"
+          end
+          mount app
+        end
+
+        get '/v1/apples/colour'
+        last_response.status.should eql 200
+        last_response.body.should == 'red'
+        options '/v1/apples/colour'
+        last_response.status.should eql 204
+      end
+
     end
   end