如何在Rails 5中使用Attach gem

Question

我的環境：

• Ruby 2.4.1
• Rails 5.1.4

我正在嘗試使用由也寫這篇文章的人https://atech.blog/atech/file-attachments-in-rails-tutorial編寫的人編寫的attach gem。

運行捆綁安裝程序時，它將安裝版本1.0.2的附加gem。

然后，當我嘗試運行rake命令時，出現一條錯誤消息，提示它不知道如何構建任務。

rake attach:install:migrations --trace

rake aborted!
Don't know how to build task 'attach:install:migrations' (see --tasks)
/usr/local/rvm/gems/ruby-2.4.1/gems/rake-12.3.0/lib/rake/task_manager.rb:59:in `[]'
/usr/local/rvm/gems/ruby-2.4.1/gems/rake-12.3.0/lib/rake/application.rb:159:in `invoke_task'
/usr/local/rvm/gems/ruby-2.4.1/gems/rake-12.3.0/lib/rake/application.rb:116:in `block (2 levels) in top_level'
/usr/local/rvm/gems/ruby-2.4.1/gems/rake-12.3.0/lib/rake/application.rb:116:in `each'
/usr/local/rvm/gems/ruby-2.4.1/gems/rake-12.3.0/lib/rake/application.rb:116:in `block in top_level'
/usr/local/rvm/gems/ruby-2.4.1/gems/rake-12.3.0/lib/rake/application.rb:125:in `run_with_threads'
/usr/local/rvm/gems/ruby-2.4.1/gems/rake-12.3.0/lib/rake/application.rb:110:in `top_level'
/usr/local/rvm/gems/ruby-2.4.1/gems/rake-12.3.0/lib/rake/application.rb:83:in `block in run'
/usr/local/rvm/gems/ruby-2.4.1/gems/rake-12.3.0/lib/rake/application.rb:186:in `standard_exception_handling'
/usr/local/rvm/gems/ruby-2.4.1/gems/rake-12.3.0/lib/rake/application.rb:80:in `run'
/usr/local/rvm/gems/ruby-2.4.1/gems/rake-12.3.0/exe/rake:27:in `<top (required)>'
/usr/local/rvm/gems/ruby-2.4.1/bin/rake:23:in `load'
/usr/local/rvm/gems/ruby-2.4.1/bin/rake:23:in `<main>'
/usr/local/rvm/gems/ruby-2.4.1/bin/ruby_executable_hooks:15:in `eval'
/usr/local/rvm/gems/ruby-2.4.1/bin/ruby_executable_hooks:15:in `<main>'

關於錯誤的任何想法？ 我想知道我是否缺少使它工作所需的寶石。 附件文檔的鏈接是https://github.com/adamcooke/attach

Answer 1

此倉庫中未定義任何rake任務。

運行bundle install ，可以通過運行rake -P獲得rake任務的列表（ rake -T顯示具有描述的任務）。 您會看到attach:install:migrations不存在。

為什么不嘗試使用paperclip呢？