Ruby-on-rails bcrypt LoadError：无法加载此类文件
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bcrypt LoadError: Cannot load such file
提问by Joe Morano
I'm trying to set up a login function for my Rails app, I'm getting a bcrypt error message when I press the login button:
我正在尝试为我的 Rails 应用程序设置登录功能，当我按下登录按钮时，我收到一条 bcrypt 错误消息：
LoadError in SessionsController#create
cannot load such file -- bcrypt
Is anyone else getting this error? I have the latest version of bcrypt and I'm following exactly what the tutorial told me to do.
还有其他人收到此错误吗？我有最新版本的 bcrypt，我完全按照教程告诉我的去做。
User Model: I put asterisks around the line where the error allegedly is.
用户模型：我在错误所在的行周围加上星号。
class User < ActiveRecord::Base
****has_secure_password****
end
Sessions Controller:
会话控制器：
class SessionsController < ApplicationController
def new
end
def create
user = User.find_by(id: params[session][:id])
if user && user.authenticate(params[:session][:password])
log_in user
redirect_to root_path
else
flash.now[:danger] = 'Invalid'
render 'new'
end
end
def destroy
end
end
ApplicationController:
应用控制器：
class ApplicationController < ActionController::Base
protect_from_forgery with: :exception
include SessionsHelper
end
SessionsHelper:
会话助手：
module SessionsHelper
def log_in(user)
session[:user_id] = user.id
end
end
Gemfile:
宝石档案：
gem 'bcrypt', '~> 3.1.7'
Sessions/new View:
会话/新视图：
<div id= "admin-sign-in">
<%= form_for(:session, url: login_path) do |f| %>
<%= f.label :id %>
<%= f.text_field :id %>
<%= f.label :password %>
<%= f.password_field :password %>
<%= f.submit "Log in", class: "btn btn-primary" %>
<% end %>
</div>
回答by Bruno Paulino
after running bundle installto install bcrypt, do not forget to restart the rails server.
It worked for me.
运行bundle install安装后bcrypt，不要忘记重启rails服务器。
它对我有用。
回答by Shaun Sweet
make sure you not only run bundle install, but that you ALSO kill the server and reload it to make sure it then loads in the new gems. you can also check your gemfile for 'spring'. if thats loaded too, you'll want to comment that out, reload the server and try it then. that should take care of all possibilities.
确保您不仅运行 bundle install，而且还杀死服务器并重新加载它以确保它随后加载到新的 gems 中。您还可以检查您的 gemfile 中的“spring”。如果那也加载了，你会想把它注释掉，重新加载服务器然后尝试。这应该考虑到所有的可能性。
回答by Graeme Campbell
I had the same issue, but couldn't resolve it until I edited the Gemfile file, and uncommented the line
我遇到了同样的问题，但直到我编辑了 Gemfile 文件并取消注释该行才能解决它
gem 'bcrypt', '~> 3.1.7'
I initially installed version 3.1.7 because I was worried if there were maybe compatibility issues with the later versions, based on something I read in another solution to this problem, but 3.1.7 also failed with another error message. However, 3.1.11 worked perfectly, and so I bumped up the comment in the Gemfile to read
我最初安装了 3.1.7 版，因为我担心后续版本是否存在兼容性问题，基于我在另一个解决方案中读到的内容，但 3.1.7 也因另一条错误消息而失败。然而，3.1.11 完美运行，所以我在 Gemfile 中添加了注释来阅读
gem 'bcrypt', '~> 3.1.11
and ran bundle install again. This worked.
并再次运行 bundle install 。这奏效了。
回答by Arta
Killing spring process and restarting Guard resolved the issue for me:
杀死 spring 进程并重新启动 Guard 为我解决了这个问题：
$ ps aux | grep spring
returned four spring processes:
返回四个spring进程：
ubuntu 11526 0.0 0.0 298748 24348 pts/1 Sl 22:08 0:00 spring server | mh03_sample_app | started 16 mins ago
ubuntu 11529 0.4 0.1 531764 79204 ? Ssl 22:08 0:04 spring app | mh03_sample_app | started 16 mins ago | test mode
...
...
kill (one by one):
杀死（一一）：
$ kill -15 11526
$ kill -15 11529
$ kill ...
$ kill ...
and restart:
并重新启动：
$ bundle exec guard
For a nice explanation see Michael Hartl's Rails Tutorial https://www.railstutorial.org/book/static_pages#aside-processes
有关很好的解释，请参阅 Michael Hartl 的 Rails 教程https://www.railstutorial.org/book/static_pages#aside-processes
