根据 GitLabs API documentation to get a repository tree via restful api call 我应该执行以下操作，此摘录来自可以在此处找到的文档，它说
列出存储库树
获取项目中存储库文件和目录的列表。
GET /projects/:id/repository/tree 参数：
id (必填) - 项目的 ID
path (optional) - 存储库内的路径。用于获取子目录的竞争
ref_name（可选）- 存储库分支或标签的名称，如果没有给出默认分支
但是当我调用上述网络服务时，它会返回
404 您要查找的页面不存在。
我打电话http://myserverurl/api/v3/projects/:id/repository/tree?private_token=myprivatetoken，我得到 404，当然我在这里传递了项目的 id，它是一个整数，如 4、5、6 等。
除了这个之外，所有其他 API 都可以正常工作，这里有什么我遗漏的吗？
这些是我production.log文件中的错误日志
Started GET
"/api/v3/projects/:id/repository/tree?private_token=mytoken&id=4" for
at 2013-06-13 12:48:36 +0530 ActionController::RoutingError (No route
matches [GET] "/api/v3/projects/:id/repository/tree"):
vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_dispatch/middleware/debug_exceptions.rb:21:in
`call'
vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_dispatch/middleware/show_exceptions.rb:56:in
`call'
vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/rack/logger.rb:32:in
`call_app'
vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/rack/logger.rb:16:in
`block in call'
vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.13/lib/active_support/tagged_logging.rb:22:in
`tagged'
vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/rack/logger.rb:16:in
`call'
vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_dispatch/middleware/request_id.rb:22:in
`call'
vendor/bundle/ruby/1.9.1/gems/rack-1.4.5/lib/rack/methodoverride.rb:21:in
`call'
vendor/bundle/ruby/1.9.1/gems/rack-1.4.5/lib/rack/runtime.rb:17:in
`call' vendor/bundle/ruby/1.9.1/gems/rack-1.4.5/lib/rack/lock.rb:15:in
`call'
vendor/bundle/ruby/1.9.1/gems/rack-cache-1.2/lib/rack/cache/context.rb:136:in
`forward'
vendor/bundle/ruby/1.9.1/gems/rack-cache-1.2/lib/rack/cache/context.rb:245:in
`fetch'
vendor/bundle/ruby/1.9.1/gems/rack-cache-1.2/lib/rack/cache/context.rb:185:in
`lookup'
vendor/bundle/ruby/1.9.1/gems/rack-cache-1.2/lib/rack/cache/context.rb:66:in
`call!'
vendor/bundle/ruby/1.9.1/gems/rack-cache-1.2/lib/rack/cache/context.rb:51:in
`call'
vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/engine.rb:479:in
`call'
vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/application.rb:223:in
`call'
vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/railtie/configurable.rb:30:in
`method_missing'
vendor/bundle/ruby/1.9.1/gems/rack-1.4.5/lib/rack/builder.rb:134:in
`call'
vendor/bundle/ruby/1.9.1/gems/rack-1.4.5/lib/rack/urlmap.rb:64:in
`block in call'
vendor/bundle/ruby/1.9.1/gems/rack-1.4.5/lib/rack/urlmap.rb:49:in
`each'
vendor/bundle/ruby/1.9.1/gems/rack-1.4.5/lib/rack/urlmap.rb:49:in
`call'
vendor/bundle/ruby/1.9.1/gems/puma-2.0.1/lib/puma/configuration.rb:66:in
`call'
vendor/bundle/ruby/1.9.1/gems/puma-2.0.1/lib/puma/server.rb:364:in
`handle_request'
vendor/bundle/ruby/1.9.1/gems/puma-2.0.1/lib/puma/server.rb:243:in
`process_client'
vendor/bundle/ruby/1.9.1/gems/puma-2.0.1/lib/puma/server.rb:142:in
`block in run'
vendor/bundle/ruby/1.9.1/gems/puma-2.0.1/lib/puma/thread_pool.rb:92:in
`call'
vendor/bundle/ruby/1.9.1/gems/puma-2.0.1/lib/puma/thread_pool.rb:92:in
`block in spawn_thread'