From 81a8c4211570fd1a5d1a2d9144db4beede2c9e1a Mon Sep 17 00:00:00 2001 From: Martin Krizek Date: Mon, 9 Apr 2018 11:08:04 +0200 Subject: [PATCH] Give hint when lookup fails on one element list (#38406) * Give hint when lookup fails on one element list * Mention wantlist first * Fix pep8... --- lib/ansible/executor/task_executor.py | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/lib/ansible/executor/task_executor.py b/lib/ansible/executor/task_executor.py index 8dc17f76b8..d6e7bbdf54 100644 --- a/lib/ansible/executor/task_executor.py +++ b/lib/ansible/executor/task_executor.py @@ -233,7 +233,11 @@ class TaskExecutor: elif self._task.loop: items = templar.template(self._task.loop) if not isinstance(items, list): - raise AnsibleError("Invalid data passed to 'loop' it requires a list, got this instead: %s" % items) + raise AnsibleError( + "Invalid data passed to 'loop', it requires a list, got this instead: %s." + " Hint: If you passed a list/dict of just one element," + " try adding wantlist=True to your lookup invocation or use q/query instead of lookup." % items + ) # now we restore any old job variables that may have been modified, # and delete them if they were in the play context vars but not in