jQuery 3 causing errors in Rails admin

[MatthiasRMS]

A few things where broken in Rails admin (multiselect for associations, for example), and after opening the browser's console, there was this error:

Cannot read property 'push' of undefined
RailsAdmin is not defined

After doing some quick research, it turns out that since Rails Admin uses jQuery 3, this error appeared.

I had to copy all of the gem's javascript folder to my app's assets, and change:
//= require 'jquery'

to:

//= require 'jquery2'

in rails_admin.js.

It's definitely not a good solution, but the only one I've found so far. I can't imagine being the only one with this issue. Has this been addressed somewhere else ? I couldn't find anything related yet.

[jklimke]

I propose a 'solution' / fix for first error "Cannot read property 'push' of undefined" in
#2842

[MatthiasRMS]

Thanks @jklimke , but I'm trying to find a solution without adding quick fixes or snippets of code which would much likely break with upcoming releases. Reverting to jQuery 2 doesn't break anything. See:
#2839

[mshibuya]

Don't you use jquery-rails?
https://github.com/rails/jquery-rails#installation
The name jquery is for jQuery 1.x, if you need jQuery 3.x you should require jquery3 in your application.