My opinionated ruby on rails template
Fix duplicate pg gem error with Rails 8+
Rails 8+ apps already include gem "pg", "~> 1.1" by default.
The template was unconditionally adding gem 'pg' causing a
Bundler error about duplicate gems with different versions.
Now checks if pg gem already exists before adding it.
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-1
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-1
modules/database.rb
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-1
modules/database.rb
···
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say 'Configuring PostgreSQL with multi-database setup...', :green
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-
gem 'pg'
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+
# Only add pg gem if not already present (Rails 8+ includes it by default)
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+
gem 'pg' unless File.read('Gemfile').match?(/gem ['"]pg['"]/) rescue false
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say ' Creating database.yml...', :cyan
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file 'config/database.yml', <<~YAML, force: true