{"action":"created","issue":{"url":"https://api.github.com/repos/playframework/playframework/issues/4598","labels_url":"https://api.github.com/repos/playframework/playframework/issues/4598/labels{/name}","comments_url":"https://api.github.com/repos/playframework/playframework/issues/4598/comments","events_url":"https://api.github.com/repos/playframework/playframework/issues/4598/events","html_url":"https://github.com/playframework/playframework/issues/4598","id":84496515,"number":4598,"title":"[2.4.0] play.api.libs.json.Json.{writes & reads} not work well with Slick row definition case class","user":{"login":"DieterLi","id":9697015,"avatar_url":"https://avatars.githubusercontent.com/u/9697015?v=3","gravatar_id":"","url":"https://api.github.com/users/DieterLi","html_url":"https://github.com/DieterLi","followers_url":"https://api.github.com/users/DieterLi/followers","following_url":"https://api.github.com/users/DieterLi/following{/other_user}","gists_url":"https://api.github.com/users/DieterLi/gists{/gist_id}","starred_url":"https://api.github.com/users/DieterLi/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/DieterLi/subscriptions","organizations_url":"https://api.github.com/users/DieterLi/orgs","repos_url":"https://api.github.com/users/DieterLi/repos","events_url":"https://api.github.com/users/DieterLi/events{/privacy}","received_events_url":"https://api.github.com/users/DieterLi/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":3,"created_at":"2015-06-03T11:04:20Z","updated_at":"2015-07-07T13:23:49Z","closed_at":"2015-06-03T11:17:22Z","body":"In previous versions of Playframework, I directly use writes/reads functions to create implicit json converters with Slick row definition case classes, which were good. \r\n\r\nBut in 2.4.0, I got the error as following:\r\n```\r\nimport models.Tables.UserRow\r\n...\r\n[error]  found   : play.api.libs.json.OWrites[Tables.this.UserRow]\r\n[error]  required: play.api.libs.json.Writes[models.Tables.UserRow]\r\n[error]  Note: implicit value userWrites is not applicable here because it comes after the application point and it lacks an explicit result type\r\n[error]   implicit val userWrites = Json.writes[UserRow]\r\n```\r\nUserRow is the case class automatically generated by slick.codegen.SourceCodeGenerator. I haven't found any clue on this issue. Please help, thanks."},"comment":{"url":"https://api.github.com/repos/playframework/playframework/issues/comments/119201551","html_url":"https://github.com/playframework/playframework/issues/4598#issuecomment-119201551","issue_url":"https://api.github.com/repos/playframework/playframework/issues/4598","id":119201551,"user":{"login":"DieterLi","id":9697015,"avatar_url":"https://avatars.githubusercontent.com/u/9697015?v=3","gravatar_id":"","url":"https://api.github.com/users/DieterLi","html_url":"https://github.com/DieterLi","followers_url":"https://api.github.com/users/DieterLi/followers","following_url":"https://api.github.com/users/DieterLi/following{/other_user}","gists_url":"https://api.github.com/users/DieterLi/gists{/gist_id}","starred_url":"https://api.github.com/users/DieterLi/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/DieterLi/subscriptions","organizations_url":"https://api.github.com/users/DieterLi/orgs","repos_url":"https://api.github.com/users/DieterLi/repos","events_url":"https://api.github.com/users/DieterLi/events{/privacy}","received_events_url":"https://api.github.com/users/DieterLi/received_events","type":"User","site_admin":false},"created_at":"2015-07-07T13:23:49Z","updated_at":"2015-07-07T13:23:49Z","body":"@tekezoe I don't know why there is no one response this, no materials explain format/writes/reads started with O, and no clue till to now. And the referred Google group topic was posted by me, twice. \r\n\r\nぜんぜん　わかりません。\r\n\r\nHave to wait and keep searching."}}