Ruby why use gemset if there is a bundler?

Question

Ruby on Rails

Hello
I use RVM as my Ruby version manager. I can't figure out for what purpose to use separate gemsets in rail projects. After all, you can simply register the gems in the Gemfile , did a bundle install and they are locked in the Gemfile.lock file.

Answer 1

Gemsets are needed if there is no bundler

Answer 2

Well, in general, it seems like gemsets are made to group gems and not clog the system with their unnecessary versions. But I also somehow don't use them at all.

Answer 3

These technologies developed in parallel, as a result, it turned out that it was more convenient to use gemsets during development, and a bundler to deploy the application.

Answer 4

not everywhere there is a bundle

Answer 5

Bundler was not always on the same rails, but RVM was already there then)

Answer 6

There is a catch in the bundler.
Yes, Bandler installs the versions specified in the gemfile.
But:
1) sets them globally
2) does not control the use of the required versions
That is, it can control, but for this you need to write before each command bundle exec- otherwise the gem file is ignored, and the latest versions of gems installed globally are used.
But with gemsets, gems are placed locally for each set, and there is a guarantee that the correct version of the gems will be used.