[RUBY] Error when bundle install


This section describes the error that occurred when bundle install gem in Rails application and how to solve it.


Ruby 2.6.5 Ruby on Rails 6.0.0


Error statement

An error occurred while installing pg (1.2.3), and Bundler cannot
Make sure that `gem install pg -v '1.2.3' --source 'https://rubygems.org/'`
succeeds before bundling.


Could not find gem 'pg (>= 0.18, < 2.0)' in any of the gem sources listed in your Gemfile.

It is an error such as.

How to solve

It was solved by the following command.

brew install postgres

It seems that I was stuck in postgresQL.

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