Check if a list contains an item in Ansible

Question:

I’m trying to check if the version supplied is a valid supported version. I’ve set the list of acceptable versions in a variable, and I want to fail out of the task if the supplied version is not in the list. However, I’m unsure of how to do that.

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Above is sort of what I want to do, but I haven’t been able to figure out if there’s a one line way to construct a “list contains” call for the fail module.

Answer:

You do not need {{}} in when conditions. What you are searching for is:

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