Problem with user.get_groups

[ross]

From DR at DGU

Basically get_groups() appears to cache its results, but this falls down when subsequent calls are in a different session. We get this when saving a dataset. get_groups() first gets called in the controller when it is trying to work out what permissions the user has. It later gets called, and by this time c.userobj is detached, so get_groups() fails.

I'm working around this by refreshing c.userobj (from c.user) before calling get_groups(), but I wonder if the get_groups caching could detect the detached session and bypass the cache in this case?

diff at ​https://gist.github.com/3003117