https://stackoverflow.com/questions/70849954/undefined-method-mechanism-for-activesupportdependenciesmodule-nomethoder

error:undefined method `mechanism=' for ActiveSupport::Dependencies:Module
解决:

I recently upgraded an to Rails 7.0.1 and I ran into this same issue. I saw this same error when trying to run

rails console
.

I got past it when I removed

spring-watcher-listen
from the Gemfile (because it was preventing
spring
from updating past
2.x
) and then bumped
spring
to
3.0.0
in the Gemfile. Then I ran
bundle
and
rails console
worked again.