ruby - What version of Rails is this? -

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I have a railway app that I do not know which version it is.

Here is the app directory: Enter image details here

Take a look at your config / environment.rb file You should see a line like this: < / P> 

  RAILS_GEM_VERSION = 'xxx' as long as not defined? RAILS_GEM_VERSION   
 Where xxx should be your version.  
 It is being said, you also need to make sure that your  seller does not have any version of Rail  directory, whatever the gem version loads possible Could try

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