api: provide a way to map a model name to a model UUID

[Roger Peppe]

Currently in the Juju client API, in the absence of current cached models info, there appears to be no way to connect to a model with a given name other than by using a ListModels call to list all models, then doing a search for the model name in that to find its UUID.

It would feel more natural (and it would be more efficent) to be able to ask a controller for the UUID for a given model name, and/or to be able to make an API connection using a model name instead of a UUID.

For example, we could connect using /modelname/:user/:name/api to connect to a model with a particular name, or if we didn't want to constrain future possible model names, then some sort of quoting mechanism for the slashes in the model name could be used.

[John A Meinel (jameinel)]

it would want to be a controller level facade, and thus ultimately implemented by JEM for JAAS.
As such the response probably also needs to include information about ultimately what controller the model is running.

[Canonical Juju QA Bot (juju-qa-bot)]

This bug has not been updated in 2 years, so we're marking it Low importance. If you believe this is incorrect, please update the importance.