Find all needed information about Activesupport Uninitialized Constant. Below you can see links where you can find everything you want to know about Activesupport Uninitialized Constant.
https://stackoverflow.com/questions/5176782/uninitialized-constant-activesupportdependenciesmutex-nameerror
If you want to keep your version same like rails will be 2.3.8 and gem version will be latest. You can use this solution Latest gem with Rails2.x. in this some changes in boot.rb file and environment.rb file.. require 'thread' in boot.rb file at the top.. and in environment.rb file …
https://stackoverflow.com/questions/37978091/uninitialized-constant-activesupporteventedfileupdatechecker-in-env-config-fil
tl;dr: Re-create your Rails project, providing the specific Rails version. Often this occurs because you have a newer version of Rails installed than the one called for in your .railsrc or template.rb.. If this is the case, when you run rails new my_new_app, the newest version is used by default for the earlier steps of the process, but then once the template/railsrc version is installed ...
https://www.thoughtco.com/nameerror-uninitialized-2907928
To troubleshoot your code, examine it for the possible causes listed above one at a time. If you find a problem, address it. For example, go through the code looking for a discrepancy in uppercase and lowercase usage on variables and classes.
https://github.com/rails/rails/issues/14664
Apr 09, 2014 · uninitialized constant ActiveSupport::Autoload (NameError), sometimes, at ramdom rails/rails#14664 sanemat mentioned this issue Apr 11, 2014 Correct cherry-pick from active_support …
https://github.com/reactjs/react-rails/issues/534
May 17, 2016 · Hi, sorry about that! That code was just changed to support Rails 5: #526 Judging by the stack trace, this is a Rails 5-beta3 project, correct? If it isn't, you could try bundle exec rails g react:install-- that way it will use the Rails version from your gemfile, in case it doesn't match the default version in your terminal.. If it still doesn't work, have no fear.
https://es.stackoverflow.com/questions/47469/error-uninitialized-constant-activesupporteventedfileupdatechecker-nameerror
El problema es que ActiveSupport::EventedFileUpdateChecker fue introducido en Rails 5. Si bajaste de versión tan solo cambiando de versión de rails en tu Gemfile, claramente te va a causar problemas, porque los archivos de configuración siguen hechos para rails 5. Tienes dos opciones, la primera es comentar/borrar la línea de configuración que te está causando el problema:
https://makandracards.com/makandra/1051-fixing-uninitialized-constant-activesupport-dependencies-mutex-nameerror
All source code included in the card Fixing "uninitialized constant ActiveSupport::Dependencies::Mutex (NameError)" is licensed under the license stated below. This includes both code snippets embedded in the card text and code that is included as a file attachment.
https://www.howtobuildsoftware.com/index.php/how-do/bSMy/ruby-on-rails-routing-routing-error-uninitialized-constant-userscontroller
Heroku rake db:migrate failing - uninitialized constant. ruby-on-rails,ruby,heroku. Your migration file named should correspond to AddWeightToExercises. It should be accordingly xxxxxxxx_add_weight_to_exercises, where xxxxxxx corresponds to a particular timestamp.
https://api.rubyonrails.org/classes/ActiveSupport/Concern.html
Evaluate given block in context of base class, so that you can write class macros here. When you define more than one included block, it raises an exception.
https://stackanswers.net/questions/uninitialized-constant-tzinfo-invalidtimezoneidentifier-nameerror-rails-4
Это работает для меня: gem uninstall tzinfo #select 'All versions' gem install tzinfo rails c
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