Rails 5 Heroku - 未能檢測到set buildpack

Question

我有一個Rails 5應用程序，我試圖推向Heroku。 Heroku實例存在，git遠程設置等。但是，我收到一個錯誤，它無法檢測到buildpack，儘管它已被定義。有任何想法嗎？

$ heroku buildpacks 
=== xx Buildpack URL 
heroku/ruby 

$ heroku buildpacks:set heroku/ruby 
▸ The buildpack heroku/ruby is already set on your app. 

$ git push heroku master 
Counting objects: 1208, done. 
Delta compression using up to 8 threads. 
Compressing objects: 100% (1075/1075), done. 
Writing objects: 100% (1208/1208), 25.04 MiB | 1.63 MiB/s, done. 
Total 1208 (delta 634), reused 217 (delta 49) 
remote: Compressing source files... done. 
remote: Building source: 
remote: 
remote: -----> Failed to detect set buildpack https://codon-buildpacks.s3.amazonaws.com/buildpacks/heroku/ruby.tgz 
remote: More info: https://devcenter.heroku.com/articles/buildpacks#detection-failure 
remote: 
remote: !  Push failed 
remote: Verifying deploy... 
remote: 
remote: ! Push rejected to xx. 
... 

Answer 1

如果配置的buildpack無法處理您的應用程序（由其檢測腳本確定），您將收到一個錯誤。例如，Heroku的Ruby buildpack需要在應用程序的根文件夾中存在Gemfile以正確標識其類型，但是如果應用程序的buildpack設置爲heroku/ruby​​並且沒有Gemfile存在，則應用程序將無法構建。嘗試檢查您的Gemfile是否存在於項目的根文件夾中。