Give a full_name to parameters in param groups, so

documentation can properly access these parameters.

lib/grape/validations.rb

@@ -107,6 +107,11 @@ def params(params)
         params
       end
 
+      def full_name(name)
+        return "#{@parent.full_name(@element)}[#{name}]" if @parent
+        name.to_s
+      end
+
     private
       def validates(attrs, validations)
         doc_attrs = { :required => validations.keys.include?(:presence) }
@@ -123,9 +128,10 @@ def validates(attrs, validations)
         if desc = validations.delete(:desc)
           doc_attrs[:desc] = desc
         end
-
-        @api.document_attribute(attrs, doc_attrs)
-
+
+        full_attrs = attrs.collect{ |name| { :name => name, :full_name => full_name(name)} }
+        @api.document_attribute(full_attrs, doc_attrs)
+
         # Validate for presence before any other validators
         if validations.has_key?(:presence) && validations[:presence]
           validate('presence', validations[:presence], attrs, doc_attrs)
@@ -168,10 +174,10 @@ def params(&block)
       def document_attribute(names, opts)
         if @last_description
           @last_description[:params] ||= {}
-        
+
           Array(names).each do |name|
-            @last_description[:params][name.to_s] ||= {}
-            @last_description[:params][name.to_s].merge!(opts)
+            @last_description[:params][name[:name].to_s] ||= {}
+            @last_description[:params][name[:name].to_s].merge!(opts).merge!({:full_name => name[:full_name]})
           end
         end
       end

spec/grape/api_spec.rb

@@ -1029,7 +1029,7 @@ class CommunicationError < RuntimeError; end
       subject.routes.map { |route|
         { :description => route.route_description, :params => route.route_params }
       }.should eq [
-        { :description => "method", :params => { "ns_param" => { :required => true, :desc => "namespace parameter" }, "method_param" => { :required => false, :desc => "method parameter" } } }
+        { :description => "method", :params => { "ns_param" => { :required => true, :desc => "namespace parameter", :full_name=>"ns_param" }, "method_param" => { :required => false, :desc => "method parameter", :full_name=>"method_param" } } }
       ]
     end
     it "should merge the parameters of nested namespaces" do
@@ -1055,7 +1055,22 @@ class CommunicationError < RuntimeError; end
       subject.routes.map { |route|
         { :description => route.route_description, :params => route.route_params }
       }.should eq [
-        { :description => "method", :params => { "ns_param" => { :required => true, :desc => "ns param 2" }, "ns1_param" => { :required => true, :desc => "ns1 param" }, "ns2_param" => { :required => true, :desc => "ns2 param" }, "method_param" => { :required => false, :desc => "method param" } } }
+        { :description => "method", :params => { "ns_param" => { :required => true, :desc => "ns param 2", :full_name=>"ns_param" }, "ns1_param" => { :required => true, :desc => "ns1 param", :full_name=>"ns1_param" }, "ns2_param" => { :required => true, :desc => "ns2 param", :full_name=>"ns2_param" }, "method_param" => { :required => false, :desc => "method param", :full_name=>"method_param" } } }
+      ]
+    end
+    it "should provide a full_name for parameters in nested groups" do
+      subject.desc "nesting"
+      subject.params do
+        requires :root_param, :desc => "root param"
+        group :nested do
+          requires :nested_param, :desc => "nested param"
+        end
+      end
+      subject.get "method" do ; end
+      subject.routes.map { |route|
+        { :description => route.route_description, :params => route.route_params }
+      }.should eq [
+        { :description => "nesting", :params => { "root_param" => { :required => true, :desc => "root param", :full_name=>"root_param" }, "nested_param" => { :required => true, :desc => "nested param", :full_name=>"nested[nested_param]" } } }
       ]
     end
     it "should not symbolize params" do