您正在尝试在 heroku-20 上安装 ruby​​-2.6.3

Question

我曾尝试将 gemfile 更改为早期版本，然后再次推送，但似乎不起作用。这是代码。有任何想法吗？

不确定我是否以正确的格式发布，这是我的第一篇 SO 帖子。

任何帮助将不胜感激，我的命令会git push heroku master生成该输出。

    Counting objects: 133, done.
    Compressing objects: 100% (109/109), done.
    Writing objects: 100% (133/133), 152.51 KiB | 3.81 MiB/s, done.
    Total 133 (delta 14), reused 0 (delta 0)
    remote: Compressing source files... done.
    remote: Building source:
    remote: 
    remote: -----> Building on the Heroku-20 stack
    remote: -----> Ruby app detected
    remote: -----> Installing bundler 2.1.4
    remote: -----> Removing BUNDLED WITH version in the Gemfile.lock
    remote: -----> Compiling Ruby/Rails
    remote:        Command: 'set -o pipefail; curl -L --fail --retry 5 --retry-delay 1 --connect-timeout 3 --max-time 30 https://s3-external-1.amazonaws.com/heroku-buildpack-ruby/heroku-20/ruby-2.6.3.tgz -s -o - | tar zxf - ' failed on attempt 1 of 3.
    remote:        Command: 'set -o pipefail; curl -L --fail --retry 5 --retry-delay 1 --connect-timeout 3 --max-time 30 https://s3-external-1.amazonaws.com/heroku-buildpack-ruby/heroku-20/ruby-2.6.3.tgz -s -o - | tar zxf - ' failed on attempt 2 of 3.
    remote: 
    remote:  !
    remote:  !     The Ruby version you are trying to install does not exist on this stack.
    remote:  !     
    remote:  !     You are trying to install ruby-2.6.3 on heroku-20.
    remote:  !     
    remote:  !     Ruby ruby-2.6.3 is present on the following stacks:
    remote:  !     
    remote:  !     - cedar-14
    remote:  !     - heroku-16
    remote:  !     - heroku-18
    remote:  !     
    remote:  !     Heroku recommends you use the latest supported Ruby version listed here:
    remote:  !     https://devcenter.heroku.com/articles/ruby-support#supported-runtimes
    remote:  !     
    remote:  !     For more information on syntax for declaring a Ruby version see:
    remote:  !     https://devcenter.heroku.com/articles/ruby-versions
    remote:  !
    remote:  !     Push rejected, failed to compile Ruby app.
    remote: 
    remote:  !     Push failed
    remote:  !
    remote:  ! ## Warning - The same version of this code has already been built: 5cf5d180a3b3f6f75291fac84f9be0b99d863efc
    remote:  !
    remote:  ! We have detected that you have triggered a build from source code with version 5cf5d180a3b3f6f75291fac84f9be0b99d863efc
    remote:  ! at least twice. One common cause of this behavior is attempting to deploy code from a enter code heredifferent branch.
    remote:  !
    remote:  ! If you are developing on a branch and deploying via git you must run:
    remote:  !
    remote:  !     git push heroku <branchname>:main
    remote:  !
    remote:  ! This article goes into details on the behavior:
    remote:  !   https://devcenter.heroku.com/articles/duplicate-build-version
    remote: 
    remote: Verifying deploy...
    remote: 
    remote: !       Push rejected to afternoon-garden-77939.
    remote: 
    To https://git.heroku.com/afternoon-garden-77939.git
     ! [remote rejected] master -> master (pre-receive hook declined)
    error: failed to push some refs to 'https://git.heroku.com/afternoon-garden-77939.git'

Answer 1

heroku stack
heroku stack:set heroku-18

详细视图https://devcenter.heroku.com/articles/stack

Answer 2

remote:  !     You are trying to install ruby-2.6.3 on heroku-20.
remote:  !     
remote:  !     Ruby ruby-2.6.3 is present on the following stacks:
remote:  !     
remote:  !     - cedar-14
remote:  !     - heroku-16
remote:  !     - heroku-18

目前支持的 heroku-20 Ruby 版本可以在这里查看： https:
//devcenter.heroku.com/articles/ruby-support#supported-runtimes

2.6.6, Rubygems: 3.0.3
2.7.2, Rubygems: 3.1.4
3.0.0, Rubygems: 3.2.3

该列表将随着时间而变化（新的 ubuntu/heroku 版本、新的 Ruby 版本发布，...）

更新您的 ruby​​ 版本（并确保您的项目与新的 ruby​​ 版本兼容）。