[RAILS] The version of Ruby that was installed by default on the Mac was referenced, not from rbenv

Difference between rbenv and Ruby version installed by default on Mac

When I tried to start work and did bin / rails s as usual, I got the following message.

$ bin/rails s
Your Ruby version is 2.6.3, but your Gemfile specified 2.6.5

When I check the version of Ruby set in the system, I should have installed 2.6.5 with rbenv, but it is 2.6.3.

$ ruby -v
ruby 2.6.3p62 (2019-04-16 revision 67580) [universal.x86_64-darwin19]

I also checked the version specified in rbenv just in case, but there is no mistake in 2.6.5.

$ rbenv versions
* 2.6.5 (set by /Users/username/desktop/Directory name/.ruby-version)

Check the reference destination of Ruby

First, check if the rbenv path is in place, but there was no problem.

$ cat ~/.bash_profile
export PATH="$HOME/.rbenv/bin:$PATH"
eval "$(rbenv init -)"

When I checked the reference destination of the ruby command, it was not referenced from rbenv as shown below. The same was true for the bundler command.

$ which ruby
$ which bundler

I also checked the order in which the paths were read, but there was no problem with the reading order. Therefore, I speculated that there might be a problem with the installation status of rbenv in the first place. First, I checked shims of rbenv. shims is a file that manages rbenv's executable commands such as ʻirb, gem, rake, rails, ruby`.

$ ls -l ~/.rbenv/shims
#It was empty.

Because the contents were empty, it was said that the version of Ruby managed by rbenv was not referenced. Was it deleted in some way ...

Install another version of Ruby

At first, I didn't intend to install another version of Ruby, so I ran rehash, which is a function of rbenv, to add a set of commands to shims.

$ rbenv rehash

#Check shims if commands have been added
$ ls -l ~/.rbenv/shims
#Leave empty...

Running rehash did not add any commands. We conducted various investigations, but did not find the cause. At this time, I decided to install Ruby 2.6.6, which is a stable version as of May 26, 2020, when I wrote this article.

Install Ruby 2.6.6

$ rbenv install 2.6.6
$ rbenv rehash  #Add command
$ rbenv global 2.6.6 #Specify the version to be used system-wide

Check the reference destination of the ruby command

$ which ruby
$ which bundler
/Users/kawafujimasashi/.rbenv/shims/bundler #Check the bundler just in case. It was added without any problems.

Apply the version of Ruby installed on Rails

#Move to the top level directory of your Rails application
$ rbenv local 2.6.6 #Specify the version of Ruby to use.ruby-rewrite the version file
$ bundle install

And when I executed bin / rails s, the version specified by rbenv was referenced and it worked.

Referenced page

Official github README https://github.com/rbenv/rbenv#how-rbenv-hooks-into-your-shell

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