I’m working on a project that uses :mongodb_driver (GitHub - zookzook/elixir-mongodb-driver: MongoDB driver for Elixir · GitHub). I use Ecto changesets but not full ecto queries. I’d like to be able to use libraries that use Ecto so I am looking into adding full Ecto via :mongodb_ecto. :mongodb_driver README says it has supported Ecto since v1.4.0.

I picked this driver some time ago as the repo seemed more alive. This driver also provides watch_collection which allows my elixir service to respond to changes in mongo.

:mongdb_ecto seems typically to use :mongodb, a different driver.

:mongdb_ecto expects the struct Mongo.Query to have the key :extra. :mongodb has this key in that struct, :mongodb_driver does not.

I’m using current versions, and have tried combinations of older versions but have not found a combination where this works.

I’m considering forking :mongodb_ecto to handle this, on the presumption that whatever :extra is doing I can work around it or bypass it as I don’t need it. If I find something elegant I can offer PR. I’m also asking :mongodb_driver maintainers if I can contribute, in which case I’ll figure out what work :extra is doing and submit a PR that supports it.

Maybe someboy else has figured this out and I can do something similar to what they did and not have to do the above.

Alternatively, maybe somebody has a different idea altogether. I’m open. I’m even willing to discuss at length “why aren’t you just using Postgres” which I expect from this joyus community. I might even find a path to that less costly than anything else, and projects like GitHub - mathieuprog/polymorphic_embed: Polymorphic embeds in Ecto · GitHub make this more tenable. But for now presume that I’d just like to learn how :mongodb_driver works with :mongodb_ecto, like I believe that it says it does.