Require applications to have reloading enabled in the managed environ… #652
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Spring changes application configuration on the fly. This has several issues:
ActiveSupport::Dependencies.mechanism=is a private setter. The public interface to enable reloading in Rails applications isconfig.cache_classes, set inconfig/environments/*.rb.ActiveSupport::Dependencies.mechanism=does not even exist in Rails 7.In this patch we document reloading has to be enabled, and check the setting in an inititalizer.
Note that Rails 6.x applications that were generated with Spring enabled (the default), already had
config.cache_classes = falsegenerated inconfig/environments/test.rb(commit).Fixes #649.