Ruby/PgSQL error on Rails start : cannot load such file — pg_ext (LoadError)

Question

I\'m new to Ruby (coming from a Java background) and was given access to a RoR project from a Git repository. I was able to get Ruby built with rbenv and Postgres installed

Answer 1

I've already installed the pg gem list pg

I also encountered this problem and I made it work. First, you run the command: $ gem install pg --pre
Successfully installed pg-0.21.0-x64-mingw32

Next, you update your Gemfile: gem 'pg', '~> 0.21.0'. That's it.

My rubygems environment are as follow:

RubyGems Environment:
  - RUBYGEMS VERSION: 2.6.12
  - RUBY VERSION: 2.3.3 (2016-11-21 patchlevel 222) [x64-mingw32]
  - INSTALLATION DIRECTORY: C:/Ruby23-x64/lib/ruby/gems/2.3.0
  - USER INSTALLATION DIRECTORY: C:/Users/armano/.gem/ruby/2.3.0
  - RUBY EXECUTABLE: C:/Ruby23-x64/bin/ruby.exe
  - EXECUTABLE DIRECTORY: C:/Ruby23-x64/bin
  - SPEC CACHE DIRECTORY: C:/Users/armano/.gem/specs
  - SYSTEM CONFIGURATION DIRECTORY: C:/ProgramData
  - RUBYGEMS PLATFORMS:
    - ruby
    - x64-mingw32
  - GEM PATHS:
     - C:/Ruby23-x64/lib/ruby/gems/2.3.0
     - C:/Users/armano/.gem/ruby/2.3.0
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :backtrace => false
     - :bulk_threshold => 1000
     - "gem" => "--no-ri --no-rdoc"
  - REMOTE SOURCES:
     - https://rubygems.org/