Win10下Ruby on Rails中bcrypt无法正常使用的问题求助

Hey there, I feel your frustration—going through countless fixes without progress is so disheartening. Let's break down this bcrypt issue step by step, tailored to your specific setup:

1. First, Verify DevKit is Properly Configured #

Even if you installed DevKit via Rails Installer, it might not be correctly linked to your Ruby installation. Let's fix that first:

• Open a command prompt and navigate to your DevKit directory (usually C:\RailsInstaller\DevKit)
• Run these commands to bind DevKit to your Ruby:

  ruby dk.rb init
  ruby dk.rb install
  

This ensures your Ruby can access the DevKit's compilation tools when building native gems like bcrypt.

2. Fully Clean Up Old bcrypt Installations #

Lingering old versions can cause conflicts. Let's wipe them all:

• Uninstall all bcrypt-related gems:

  gem uninstall bcrypt --all
  gem uninstall bcrypt-ruby --all # Some older setups use this package name
  

• Confirm they're gone by checking your gem list:

  gem list bcrypt
  

• Double-check your project's Gemfile to ensure it specifies the correct version:

  gem 'bcrypt', '3.1.7'
  

3. Install bcrypt with the Right Environment #

The --platform=ruby flag needs the DevKit environment loaded to work. Here's the correct workflow:

• In the same command prompt where you ran the DevKit setup, load the DevKit environment variables:

  cd C:\RailsInstaller\DevKit
  devkitvars.bat
  

• Navigate back to your Rails project directory, then install bcrypt:

  gem install bcrypt -v 3.1.7 --platform=ruby
  

• If manual compilation is needed (in case the above fails):
  1. Download the bcrypt 3.1.7 source zip from RubyGems, extract it to a folder without spaces
  2. In the DevKit-enabled command prompt, navigate to that folder and run:

     ruby extconf.rb
     make
     make install
     

4. Finalize & Test #

• After installation, sync your project's dependencies:

  bundle install
  

• Now try running your migration again:

  rake db:migrate
  

Quick Extra Checks #

• Ensure your Ruby installation path has no spaces (Rails Installer's default C:\RailsInstaller\Ruby2.3.3 is safe—spaces break compilation paths)
• Run bundle show bcrypt to confirm your project is using the 3.1.7 version you just installed

内容的提问来源于stack exchange，提问作者Mihir Deshpande