I added an :index => true to a property after already adding some records. Using Person.all(:name => 'test') does then return nothing, I guess because a key lookup is used but then key has not been set before. So I tried running the rake tasks automigrate and autouprade but both dont seem to do anything (according to redis monitor).
So I wonder how to add/ remove an index to existing records? :)
Currently, there isn't any functionality in dm-redis to update indexes based on schema changes, so there isn't currently a way to add an index to an existing record automatically.