Fixes #86

CHANGELOG.markdown

@@ -3,6 +3,7 @@
 
 * [#265](https://github.com/intridea/grape/issues/264): Fix: The class ValidationError should be in the module "Grape::Exceptions". Fixes [#264](https://github.com/intridea/grape/issues/264) - [@thepumpkin1979](https://github.com/thepumpkin1979).
 * [#269](https://github.com/intridea/grape/pull/269): Fix: LocalJumpError will not be raised when using explict return in API methods - [@simulacre](https://github.com/simulacre)
+* [#86] (https://github.com/intridea/grape/issues/275): Fix Path based versioning not recognizing '/' route
 * Your contribution here.
 
 0.2.2

lib/grape/endpoint.rb

@@ -110,10 +110,20 @@ def prepare_routes
     def prepare_path(path)
       parts = []
       parts << settings[:root_prefix] if settings[:root_prefix]
-      parts << ':version' if settings[:version] && settings[:version_options][:using] == :path
-      parts << namespace.to_s if namespace
-      parts << path.to_s if path && '/' != path
-      Rack::Mount::Utils.normalize_path(parts.join('/') + '(.:format)')
+
+      uses_path_versioning = settings[:version] && settings[:version_options][:using] == :path
+      namespace_is_empty = namespace && (namespace.to_s =~ /^\s*$/ || namespace.to_s == '/')
+      path_is_empty = path && (path.to_s =~ /^\s*$/ || path.to_s == '/')
+
+      parts << ':version' if uses_path_versioning
+      if !uses_path_versioning || (!namespace_is_empty || !path_is_empty)
+        parts << namespace.to_s if namespace
+        parts << path.to_s if path && '/' != path
+        format_suffix = '(.:format)'
+      else
+        format_suffix = '(/.:format)'
+      end
+      Rack::Mount::Utils.normalize_path(parts.join('/') + format_suffix)
     end
 
     def namespace

spec/grape/api_spec.rb

@@ -189,6 +189,53 @@ def app; subject end
       last_response.body.should eql 'Created a Vote'
     end
 
+    describe "root routes should work with" do
+      before do
+        def subject.enable_root_route!
+          self.get("/") {"root"}
+        end
+      end
+
+      after do
+        last_response.body.should eql 'root'
+      end
+
+      describe "path versioned APIs" do
+        before do
+          subject.version 'v1', :using => :path
+          subject.enable_root_route!
+        end
+
+        it "without a format" do
+          versioned_get "/", "v1", :using => :path
+        end
+
+        it "with a format" do
+          get "/v1/.json"
+        end
+      end
+
+      it "header versioned APIs" do
+        subject.version 'v1', :using => :header, :vendor => 'test'
+        subject.enable_root_route!
+
+        versioned_get "/", "v1", :using => :header
+      end
+
+      it "param versioned APIs" do
+        subject.version 'v1', :using => :param
+        subject.enable_root_route!
+
+        versioned_get "/", "v1", :using => :param
+      end
+
+      it "unversioned APIs" do
+        subject.enable_root_route!
+
+        get "/"
+      end
+    end
+
     it 'should allow for multiple paths' do
       subject.get(["/abc", "/def"]) do
         "foo"