Missing 'enhanced relation merges'?

[gamov]

I've started migrating from Rails 3 (meta_where) to Rails 3.2 (Squeel) via Rails 3.1. Since Squeel is compatible with Rails 3, I figured I should migrate to it first, then move on to Rails 3.1

The first and very serious roadblock I found, is my extensive use of this mw feature:
https://github.com/ernie/meta_where#enhanced-relation-merges
which I suppose (based on Ernie's love of the merge method) will never be ported to Squeel.
The serious problem I'm facing here is that this beautiful feature was hiding a Rails bug in the merge() method (rails/rails#3002 ironically reported by me!) that ignored the joins context while merging, making the feature rather useless for any real-world application.
Without this bug, I could add manually all the joins that mw was adding for me. However with it, it makes all my merges with joins break (~180), making it not practical to do, especially knowing that the bug is fixed in 3.2
I guess, my only very daunting option is to try a combined migration from Rails 3 (mw) to Rails 3.2 (Squeel)...

I would like confirmation of it and leave a trace here for the next person.

All this makes me wonder if I should just give up on Squeel and use arel directly (bearing with its extremely poor documentation)...

Related mw issue: activerecord-hackery/meta_where#40
Edit: Looks like my homework was badly done: #79

[ernie]

@gamov I'm sorry, but that was a poorly-considered feature and won't be making a reappearance in Squeel. :(