{"action":"created","issue":{"url":"https://api.github.com/repos/Pylons/deform/issues/374","repository_url":"https://api.github.com/repos/Pylons/deform","labels_url":"https://api.github.com/repos/Pylons/deform/issues/374/labels{/name}","comments_url":"https://api.github.com/repos/Pylons/deform/issues/374/comments","events_url":"https://api.github.com/repos/Pylons/deform/issues/374/events","html_url":"https://github.com/Pylons/deform/issues/374","id":338566240,"node_id":"MDU6SXNzdWUzMzg1NjYyNDA=","number":374,"title":"missing=None with FileUploadWidget","user":{"login":"TomOudeNijhuis","id":17047998,"node_id":"MDQ6VXNlcjE3MDQ3OTk4","avatar_url":"https://avatars3.githubusercontent.com/u/17047998?v=4","gravatar_id":"","url":"https://api.github.com/users/TomOudeNijhuis","html_url":"https://github.com/TomOudeNijhuis","followers_url":"https://api.github.com/users/TomOudeNijhuis/followers","following_url":"https://api.github.com/users/TomOudeNijhuis/following{/other_user}","gists_url":"https://api.github.com/users/TomOudeNijhuis/gists{/gist_id}","starred_url":"https://api.github.com/users/TomOudeNijhuis/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/TomOudeNijhuis/subscriptions","organizations_url":"https://api.github.com/users/TomOudeNijhuis/orgs","repos_url":"https://api.github.com/users/TomOudeNijhuis/repos","events_url":"https://api.github.com/users/TomOudeNijhuis/events{/privacy}","received_events_url":"https://api.github.com/users/TomOudeNijhuis/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":1,"created_at":"2018-07-05T13:05:14Z","updated_at":"2018-07-09T11:52:27Z","closed_at":null,"author_association":"NONE","body":"When using a SchemaNode like:\r\n```\r\nfiledata = colander.SchemaNode(\r\n    deform.FileData(), missing=None,\r\n    widget=deform.widget.FileUploadWidget(FileStorage),\r\n    title='Bestand')\r\n```\r\nI get the a _Invalid pstruct: {'upload': ' is not a FieldStorage instance'}_ error when leaving the field empty. Non-empty fields work fine.\r\nReplacing `None` with `b''` or `''` for the missing parameter gives the same result.\r\nI am using version 2.0.5"},"comment":{"url":"https://api.github.com/repos/Pylons/deform/issues/comments/403453253","html_url":"https://github.com/Pylons/deform/issues/374#issuecomment-403453253","issue_url":"https://api.github.com/repos/Pylons/deform/issues/374","id":403453253,"node_id":"MDEyOklzc3VlQ29tbWVudDQwMzQ1MzI1Mw==","user":{"login":"TomOudeNijhuis","id":17047998,"node_id":"MDQ6VXNlcjE3MDQ3OTk4","avatar_url":"https://avatars3.githubusercontent.com/u/17047998?v=4","gravatar_id":"","url":"https://api.github.com/users/TomOudeNijhuis","html_url":"https://github.com/TomOudeNijhuis","followers_url":"https://api.github.com/users/TomOudeNijhuis/followers","following_url":"https://api.github.com/users/TomOudeNijhuis/following{/other_user}","gists_url":"https://api.github.com/users/TomOudeNijhuis/gists{/gist_id}","starred_url":"https://api.github.com/users/TomOudeNijhuis/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/TomOudeNijhuis/subscriptions","organizations_url":"https://api.github.com/users/TomOudeNijhuis/orgs","repos_url":"https://api.github.com/users/TomOudeNijhuis/repos","events_url":"https://api.github.com/users/TomOudeNijhuis/events{/privacy}","received_events_url":"https://api.github.com/users/TomOudeNijhuis/received_events","type":"User","site_admin":false},"created_at":"2018-07-09T11:52:27Z","updated_at":"2018-07-09T11:52:27Z","author_association":"NONE","body":"That would satisfy me, but unfortunately using `colander.drop` or `colander.none` as missing value results in the same error."}}
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