{"action":"opened","issue":{"url":"https://api.github.com/repos/galaxyproject/galaxy/issues/2431","repository_url":"https://api.github.com/repos/galaxyproject/galaxy","labels_url":"https://api.github.com/repos/galaxyproject/galaxy/issues/2431/labels{/name}","comments_url":"https://api.github.com/repos/galaxyproject/galaxy/issues/2431/comments","events_url":"https://api.github.com/repos/galaxyproject/galaxy/issues/2431/events","html_url":"https://github.com/galaxyproject/galaxy/issues/2431","id":157663663,"number":2431,"title":"using format_source on output collection elements not working","user":{"login":"shiltemann","id":2563865,"avatar_url":"https://avatars.githubusercontent.com/u/2563865?v=3","gravatar_id":"","url":"https://api.github.com/users/shiltemann","html_url":"https://github.com/shiltemann","followers_url":"https://api.github.com/users/shiltemann/followers","following_url":"https://api.github.com/users/shiltemann/following{/other_user}","gists_url":"https://api.github.com/users/shiltemann/gists{/gist_id}","starred_url":"https://api.github.com/users/shiltemann/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/shiltemann/subscriptions","organizations_url":"https://api.github.com/users/shiltemann/orgs","repos_url":"https://api.github.com/users/shiltemann/repos","events_url":"https://api.github.com/users/shiltemann/events{/privacy}","received_events_url":"https://api.github.com/users/shiltemann/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2016-05-31T12:50:47Z","updated_at":"2016-05-31T12:50:47Z","closed_at":null,"body":"I have the following in my tool xml:\r\n\r\n```xml\r\n<inputs>\r\n    <param name=\"infile\" type=\"data\" format=\"someformat\" label=\"lab\"/>\r\n</inputs>\r\n<outputs>\r\n    <collection name=\"coll\" type=\"list\" label=\"lab\">            \r\n        <discover_datasets pattern=\".*?\\.(?P&lt;designation&gt;.*)\\.suffix\" format_source=\"infile\"/>\r\n    </collection>\r\n</outputs>\r\n```\r\n\r\nbut the format of the collection elements gets set to `None` instead of the desired `someformat`\r\n\r\ni.e. in planemo I get:\r\n`Dataset metadata verification for [file_ext] failed, expected [someformat] but found [None].`\r\n\r\nsame results if I put  `format_source` on the collection tag instead.\r\n\r\nping @jmchilton \r\n\r\n"}}
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