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Could not find gem 'pg x64-mingw32' in locally installed gems

Please help me get rid of this error

I am running Ruby on Rails on Windows 10

Could not find gem 'pg x64-mingw32' in locally installed gems.enter image description here

Solution

  • This happens, if pg gem is installed with a dedicated PostgreSQL installation. they will update the pg gem soon to fix this and to distribute ruby-3.0 compatible binary gems, but until then there are 3 workarounds:

     1. install postgresql per pacman: ridk exec pacman -S
    mingw-w64-x86_64-postgresql and reinstall pg gem 
 2. Set RUBY_DLL_PATH=<your-path-to-postgresql>/bin as in our CI (https://github.com/ged/ruby-pg/blob/4de2c7df34b23a23841b114ae6606161be44d269/appveyor.yml#L22) before
    running the ruby app. 
 3. Downgrade to ruby < 3.0, since that installs
    the binary windows gems instead.

    For more info check Github issue.