should support attribute assignment

[abellotti]

If a resource supports the edit action, the API should support attribute assignment.

i.e.

miq.requests.find(155).description = "Updated description"

here, the API client would check "<attribute_name>=" in the method missing, and if the attribute specified is a valid attribute for the resource and the resource supports the edit action, then the API would call the appropriate edit post action updating that attribute.