几周前，我在Heroku上发布了一个新应用，运行良好，没有任何问题。昨天我启动了另一个新应用，但是这次使用了--api标志。它在本地运行良好，但是当我尝试部署到heroku时，向我展示了这个
```remote: !
remote: ! Could not detect rake tasks
remote: ! ensure you can run `$ bundle exec rake -P` against your app
remote: ! and using the production group of your Gemfile.
remote: ! Activating bundler (2.0.1) failed:
remote: ! Could not find 'bundler' (2.0.1) required by your /tmp/build_ab1db454d7123f1073f7e44602c5702f/Gemfile.lock.
remote: ! To update to the latest version installed on your system, run `bundle update --bundler`.
remote: ! To install the missing version, run `gem install bundler:2.0.1`
remote: ! Checked in 'GEM_PATH=/tmp/build_ab1db454d7123f1073f7e44602c5702f/vendor/bundle/ruby/2.6.0', execute `gem env` for more information
remote: !
remote: ! To install the version of bundler this project requires, run `gem install bundler -v '2.0.1'`
remote: :```
我的尝试： -将捆绑器版本设置为2.0.1（完成工作） -本地卸载所有捆绑程序版本，并将版本安装到2.0.1（可正常工作） -删除Gemfile.lock文件并重新捆绑（完成工作） -将红宝石版本更改为2.6.1、2.5.3和2.6.3，三个都不起作用 -从Gemfile.lock删除BUNDLED WITH行，但行不通
关注我的Gemfile和Gemfile.lock
宝石文件
```source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }
ruby '2.6.1'
# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 5.2.3'
# Use postgresql as the database for Active Record
gem 'pg', '>= 0.18', '< 2.0'
# Use Puma as the app server
gem 'puma', '~> 3.11'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
# gem 'jbuilder', '~> 2.5'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 4.0'
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'
# Use ActiveStorage variant
# gem 'mini_magick', '~> 4.8'
# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development
# Reduces boot times through caching; required in config/boot.rb
gem 'bootsnap', '>= 1.1.0', require: false
# Use Rack CORS for handling Cross-Origin Resource Sharing (CORS), making cross-origin AJAX possible
# gem 'rack-cors'
group :development, :test do
# Call 'byebug' anywhere in the code to stop execution and get a debugger console
gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
end
group :development do
gem 'listen', '>= 3.0.5', '< 3.2'
# Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
gem 'spring'
gem 'spring-watcher-listen', '~> 2.0.0'
end
# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
```
Gemfile.lock
```GEM
remote: https://rubygems.org/
specs:
actioncable (5.2.3)
actionpack (= 5.2.3)
nio4r (~> 2.0)
websocket-driver (>= 0.6.1)
actionmailer (5.2.3)
actionpack (= 5.2.3)
actionview (= 5.2.3)
activejob (= 5.2.3)
mail (~> 2.5, >= 2.5.4)
rails-dom-testing (~> 2.0)
actionpack (5.2.3)
actionview (= 5.2.3)
activesupport (= 5.2.3)
rack (~> 2.0)
rack-test (>= 0.6.3)
rails-dom-testing (~> 2.0)
rails-html-sanitizer (~> 1.0, >= 1.0.2)
actionview (5.2.3)
activesupport (= 5.2.3)
builder (~> 3.1)
erubi (~> 1.4)
rails-dom-testing (~> 2.0)
rails-html-sanitizer (~> 1.0, >= 1.0.3)
activejob (5.2.3)
activesupport (= 5.2.3)
globalid (>= 0.3.6)
activemodel (5.2.3)
activesupport (= 5.2.3)
activerecord (5.2.3)
activemodel (= 5.2.3)
activesupport (= 5.2.3)
arel (>= 9.0)
activestorage (5.2.3)
actionpack (= 5.2.3)
activerecord (= 5.2.3)
marcel (~> 0.3.1)
activesupport (5.2.3)
concurrent-ruby (~> 1.0, >= 1.0.2)
i18n (>= 0.7, < 2)
minitest (~> 5.1)
tzinfo (~> 1.1)
arel (9.0.0)
bootsnap (1.4.4)
msgpack (~> 1.0)
builder (3.2.3)
byebug (11.0.1)
concurrent-ruby (1.1.5)
crass (1.0.4)
erubi (1.8.0)
ffi (1.11.1)
globalid (0.4.2)
activesupport (>= 4.2.0)
i18n (1.6.0)
concurrent-ruby (~> 1.0)
listen (3.1.5)
rb-fsevent (~> 0.9, >= 0.9.4)
rb-inotify (~> 0.9, >= 0.9.7)
ruby_dep (~> 1.2)
loofah (2.2.3)
crass (~> 1.0.2)
nokogiri (>= 1.5.9)
mail (2.7.1)
mini_mime (>= 0.1.1)
marcel (0.3.3)
mimemagic (~> 0.3.2)
method_source (0.9.2)
mimemagic (0.3.3)
mini_mime (1.0.1)
mini_portile2 (2.4.0)
minitest (5.11.3)
msgpack (1.3.0)
nio4r (2.3.1)
nokogiri (1.10.3)
mini_portile2 (~> 2.4.0)
pg (1.1.4)
puma (3.12.1)
rack (2.0.7)
rack-test (1.1.0)
rack (>= 1.0, < 3)
rails (5.2.3)
actioncable (= 5.2.3)
actionmailer (= 5.2.3)
actionpack (= 5.2.3)
actionview (= 5.2.3)
activejob (= 5.2.3)
activemodel (= 5.2.3)
activerecord (= 5.2.3)
activestorage (= 5.2.3)
activesupport (= 5.2.3)
bundler (>= 1.3.0)
railties (= 5.2.3)
sprockets-rails (>= 2.0.0)
rails-dom-testing (2.0.3)
activesupport (>= 4.2.0)
nokogiri (>= 1.6)
rails-html-sanitizer (1.0.4)
loofah (~> 2.2, >= 2.2.2)
railties (5.2.3)
actionpack (= 5.2.3)
activesupport (= 5.2.3)
method_source
rake (>= 0.8.7)
thor (>= 0.19.0, < 2.0)
rake (12.3.2)
rb-fsevent (0.10.3)
rb-inotify (0.10.0)
ffi (~> 1.0)
ruby_dep (1.5.0)
spring (2.1.0)
spring-watcher-listen (2.0.1)
listen (>= 2.7, < 4.0)
spring (>= 1.2, < 3.0)
sprockets (3.7.2)
concurrent-ruby (~> 1.0)
rack (> 1, < 3)
sprockets-rails (3.2.1)
actionpack (>= 4.0)
activesupport (>= 4.0)
sprockets (>= 3.0.0)
thor (0.20.3)
thread_safe (0.3.6)
tzinfo (1.2.5)
thread_safe (~> 0.1)
websocket-driver (0.7.1)
websocket-extensions (>= 0.1.0)
websocket-extensions (0.1.4)
PLATFORMS
ruby
DEPENDENCIES
bootsnap (>= 1.1.0)
byebug
listen (>= 3.0.5, < 3.2)
pg (>= 0.18, < 2.0)
puma (~> 3.11)
rails (~> 5.2.3)
spring
spring-watcher-listen (~> 2.0.0)
tzinfo-data
RUBY VERSION
ruby 2.6.1p33
BUNDLED WITH
2.0.2
```
我尝试了很多在网络上搜索的事情，但没有成功