{"action":"created","comment":{"url":"https://api.github.com/repos/allegro/ralph/pulls/comments/51544949","id":51544949,"diff_hunk":"@@ -238,10 +241,9 @@ def run_field_transition(\n     \"\"\"\n     Execute all actions assigned to the selected transition.\n     \"\"\"\n-    if not isinstance(instances, Iterable):\n+    if not isinstance(instances, list):","path":"src/ralph/lib/transitions/models.py","position":37,"original_position":37,"commit_id":"1b8eee91d0da3cc0805ceaa59b816aacd4cce521","original_commit_id":"827173f44f3c9aced85a38d67319cdda202ce9f0","user":{"login":"mkurek","id":107437,"avatar_url":"https://avatars.githubusercontent.com/u/107437?v=3","gravatar_id":"","url":"https://api.github.com/users/mkurek","html_url":"https://github.com/mkurek","followers_url":"https://api.github.com/users/mkurek/followers","following_url":"https://api.github.com/users/mkurek/following{/other_user}","gists_url":"https://api.github.com/users/mkurek/gists{/gist_id}","starred_url":"https://api.github.com/users/mkurek/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mkurek/subscriptions","organizations_url":"https://api.github.com/users/mkurek/orgs","repos_url":"https://api.github.com/users/mkurek/repos","events_url":"https://api.github.com/users/mkurek/events{/privacy}","received_events_url":"https://api.github.com/users/mkurek/received_events","type":"User","site_admin":false},"body":"So maybe sth like this:\r\n```\r\nif not isinstance(instances, Iterable):  # it only happens where single model instance is passed to this function (old-style transitions)\r\n    instances = [instances]\r\ninstances = list(instances)\r\n```","created_at":"2016-02-02T09:45:15Z","updated_at":"2016-02-02T09:45:15Z","html_url":"https://github.com/allegro/ralph/pull/2156#discussion_r51544949","pull_request_url":"https://api.github.com/repos/allegro/ralph/pulls/2156","_links":{"self":{"href":"https://api.github.com/repos/allegro/ralph/pulls/comments/51544949"},"html":{"href":"https://github.com/allegro/ralph/pull/2156#discussion_r51544949"},"pull_request":{"href":"https://api.github.com/repos/allegro/ralph/pulls/2156"}}},"pull_request":{"url":"https://api.github.com/repos/allegro/ralph/pulls/2156","id":56168503,"html_url":"https://github.com/allegro/ralph/pull/2156","diff_url":"https://github.com/allegro/ralph/pull/2156.diff","patch_url":"https://github.com/allegro/ralph/pull/2156.patch","issue_url":"https://api.github.com/repos/allegro/ralph/issues/2156","number":2156,"state":"open","locked":false,"title":"Dc move to bo 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