Add ProjectFolders relation to Folder serializer

app/serializers/api/v1/project_folder_serializer.rb

@@ -9,6 +9,7 @@ module Api
       belongs_to :team, serializer: TeamSerializer
       belongs_to :parent_folder, serializer: ProjectFolderSerializer
       has_many :projects, serializer: ProjectSerializer
+      has_many :project_folders, serializer: ProjectFolderSerializer
     end
   end
 end

spec/support/api/schemas/project_folders/item.json

@@ -31,6 +31,9 @@
         },
         "projects": {
           "type": "object"
+        },
+        "project_folders": {
+          "type": "object"
         }
       },
       "additionalProperties": false,