{"action":"closed","issue":{"url":"https://api.github.com/repos/square/retrofit/issues/1322","labels_url":"https://api.github.com/repos/square/retrofit/issues/1322/labels{/name}","comments_url":"https://api.github.com/repos/square/retrofit/issues/1322/comments","events_url":"https://api.github.com/repos/square/retrofit/issues/1322/events","html_url":"https://github.com/square/retrofit/issues/1322","id":118795409,"number":1322,"title":"Multipart requests must contain at least one part","user":{"login":"Vence","id":12369793,"avatar_url":"https://avatars.githubusercontent.com/u/12369793?v=3","gravatar_id":"","url":"https://api.github.com/users/Vence","html_url":"https://github.com/Vence","followers_url":"https://api.github.com/users/Vence/followers","following_url":"https://api.github.com/users/Vence/following{/other_user}","gists_url":"https://api.github.com/users/Vence/gists{/gist_id}","starred_url":"https://api.github.com/users/Vence/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Vence/subscriptions","organizations_url":"https://api.github.com/users/Vence/orgs","repos_url":"https://api.github.com/users/Vence/repos","events_url":"https://api.github.com/users/Vence/events{/privacy}","received_events_url":"https://api.github.com/users/Vence/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":2,"created_at":"2015-11-25T09:34:10Z","updated_at":"2015-12-04T22:53:41Z","closed_at":"2015-12-04T22:53:41Z","body":"In the process of dynamic publication, the file can be attached or not, you need to upload files, then you need to add @Multipart, the case if you use the @Multipart but do not need to upload a file, how to set? set @Part (\"file\")  null ? this will error: Multipart requests must contain at least one part\r\n\r\nPlease take a moment to tell me , very grateful\r\n\r\nYour fans Vence\r\n\r\n"}}