The current plan is to maintain two different versions after Mongoid 4 is released. One for Mongoid 3 and Rails 3, and one for Mongoid 4 and Rails 4. However, there is unfortunately no way we can proceed on that plan until a version of Mongoid 4 is released.

I am running into this issue too. If I read the statements over at mongoid correctly there won't be an official version before the end of the year since they are waiting for an offical release of the 10gen BSON gem which is set for 31st December 2013.

Why not create a mongoid_4 branch here so work could start on a Mongoid 4 compatible version?

Short of that you can use https://github.com/dblock/mongoid-slug/tree/mongoid-4x

@dblock @cweyer I am not against creating a branch with Mongoid 4 support, but then we need to document best practices since Mongoid 4 is not released and it will not be possible to release Mongoid Slug with Rails 4 support as a gem until Mongoid 4 is released.

Does any of you have experience with running Mongoid 4 in production? Looking at the Mongoid issue tracker it looks like it is far from release, are there breaking and potentially unsafe changes in Mongoid 4 master at this point?

Indeed the DSL changed at some points and there are still some bugs in it. We use it in production (although beta) since nearly two months and worked around some issues with atomic updates, the inc function for example doesn't seem to have any effect right now. The version we use is rather old (https://github.com/mongoid/mongoid/tree/38de2e96edc8f64fbe3cdbe062f1d91e9feb388d) because it doesnt have that many breaking changes. I wanted to updated recently and ran in the issues mentioned above, so we are stuck with that release for now. I was under the impression mongoid 4 would be released together with Rails 4 back in the day, otherwise I would never have used it in a soon-to-be production code base, but now I don't want to migrate back.

I have made this compatible with both Mongoid 3 and 4. Enjoy.

@dblock Looks good to me. Thanks! :)

@cweyer @nofxx Can you please confirm that Mongoid Slug master works for you with Mongoid 4?

@digitalplaywright looks like it's working here. Not much specs on this area but all green.

@digitalplaywright sorry for the very late response I was on vacation. I'm still getting a NameError: uninitialized constant Moped::BSON::Document error whenever I load a class that includes Mongoid but there is so much stuff that seems half baking in our dependencies I can't really tell where it's coming from, seems to be moped/connection. I will investigate further during the week

@cweyer No problem. Let me know if you experience any problems and if you have any failing test-cases. Currently Mongoid Slug is passing the test-suite on both Mongoid 3 with Rails 3 and Mongoid 4 with Rails 4.

Ok I cleaned it up, now works like a charm