在here中并在this之后进行了几次尝试后，我已成功地将存储库从本地计算机推送到heroku。但是，同时单击git和herokuapp.com link会产生错误消息。尽管此推送有很多警告，但我还是尝试迁移数据库。我可以知道这是什么问题吗？如果需要更多信息来解决问题，请告知我。提前谢谢。
宝石文件
source 'https://rubygems.org'
source 'https://rails-assets.org' do
gem 'rails-assets-tether', '>= 1.3.3'
gem 'rails-assets-chosen'
end
ruby '2.5.1'
gem 'rails', '5.2.2'
gem 'bcrypt', '3.1.11'
gem 'will_paginate', '3.1.6'
gem 'bootstrap-will_paginate', '1.0.0'
gem 'faker', '1.7.3'
gem 'bootstrap-sass', '3.3.7'
gem 'puma', '3.9.1'
gem 'sass-rails', '5.0.6'
gem 'uglifier', '3.2.0'
gem 'coffee-rails', '4.2.2'
gem 'jquery-rails', '4.3.1'
gem 'turbolinks', '5.0.1'
gem 'jbuilder', '2.7.0'
gem 'popper_js', '~> 1.11.1'
gem 'bootstrap', '4.0.0.alpha6'
gem 'simple_form'
group :development, :test do
gem 'sqlite3'
gem 'byebug', '9.0.6', platform: :mri
end
group :production do
gem 'pg'
end
group :development do
gem 'web-console', '3.5.1'
gem 'listen', '3.1.5'
gem 'spring', '2.0.2'
gem 'spring-watcher-listen', '2.0.1'
end
group :test do
gem 'rails-controller-testing', '1.0.2'
gem 'minitest', '5.10.3'
gem 'minitest-reporters', '1.1.14'
gem 'guard', '2.13.0'
gem 'guard-minitest', '2.4.4'
end
# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
config / database.yml
# SQLite version 3.x
# gem install sqlite3
#
# Ensure the SQLite 3 gem is defined in your Gemfile
# gem 'sqlite3'
#
default: &default
adapter: sqlite3
#adapter: postgresql
pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
timeout: 5000
development:
<<: *default
database: db/development.sqlite3
# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
<<: *default
database: db/test.sqlite3
production:
<<: *default
database: db/production.sqlite3
我运行git push heroku master
Enumerating objects: 7, done.
Counting objects: 100% (7/7), done.
Delta compression using up to 8 threads
Compressing objects: 100% (4/4), done.
Writing objects: 100% (4/4), 441 bytes | 441.00 KiB/s, done.
Total 4 (delta 3), reused 0 (delta 0)
remote: Compressing source files... done.
remote: Building source:
remote:
remote: -----> Ruby app detected
remote: -----> Compiling Ruby/Rails
remote: -----> Using Ruby version: ruby-2.5.1
remote: -----> Installing dependencies using bundler 1.15.2
remote: Ruby version change detected. Clearing bundler cache.
remote: Old: ruby 2.5.3p105 (2018-10-18 revision 65156) [x86_64-linux]
remote: New: ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-linux]
remote: Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin -j4 --deployment
remote: Warning: the running version of Bundler (1.15.2) is older than the version that created the lockfile (1.17.3). We suggest you upgrade to the latest version of Bundler by running `gem install bundler`.
remote: Fetching gem metadata from https://rails-assets.org/...
remote: Fetching gem metadata from https://rubygems.org/.........
remote: Fetching version metadata from https://rails-assets.org/..
remote: Fetching version metadata from https://rubygems.org/..
remote: Fetching dependency metadata from https://rails-assets.org/..
remote: Fetching dependency metadata from https://rubygems.org/.
remote: Fetching gem metadata from https://rails-assets.org/...
remote: Fetching version metadata from https://rails-assets.org/..
remote: Fetching rake 12.3.2
remote: Fetching concurrent-ruby 1.1.4
remote: Fetching minitest 5.10.3
remote: Installing minitest 5.10.3
remote: Installing rake 12.3.2
remote: Installing concurrent-ruby 1.1.4
remote: Fetching thread_safe 0.3.6
remote: Installing thread_safe 0.3.6
remote: Fetching builder 3.2.3
remote: Installing builder 3.2.3
remote: Fetching erubi 1.8.0
remote: Installing erubi 1.8.0
remote: Fetching mini_portile2 2.4.0
remote: Fetching crass 1.0.4
remote: Installing mini_portile2 2.4.0
remote: Installing crass 1.0.4
remote: Fetching rack 2.0.6
remote: Installing rack 2.0.6
remote: Fetching nio4r 2.3.1
remote: Installing nio4r 2.3.1 with native extensions
remote: Fetching websocket-extensions 0.1.3
remote: Installing websocket-extensions 0.1.3
remote: Fetching mini_mime 1.0.1
remote: Installing mini_mime 1.0.1
remote: Fetching arel 9.0.0
remote: Installing arel 9.0.0
remote: Fetching mimemagic 0.3.3
remote: Installing mimemagic 0.3.3
remote: Fetching execjs 2.7.0
remote: Installing execjs 2.7.0
remote: Fetching bcrypt 3.1.11
remote: Fetching rb-fsevent 0.10.3
remote: Installing bcrypt 3.1.11 with native extensions
remote: Installing rb-fsevent 0.10.3
remote: Fetching ffi 1.10.0
remote: Installing ffi 1.10.0 with native extensions
remote: Fetching will_paginate 3.1.6
remote: Installing will_paginate 3.1.6
remote: Using bundler 1.15.2
remote: Fetching coffee-script-source 1.12.2
remote: Installing coffee-script-source 1.12.2
remote: Fetching method_source 0.9.2
remote: Installing method_source 0.9.2
remote: Fetching thor 0.20.3
remote: Installing thor 0.20.3
remote: Fetching multi_json 1.13.1
remote: Installing multi_json 1.13.1
remote: Fetching pg 0.18.4
remote: Installing pg 0.18.4 with native extensions
remote: Fetching popper_js 1.11.1
remote: Installing popper_js 1.11.1
remote: Fetching puma 3.9.1
remote: Installing puma 3.9.1 with native extensions
remote: Fetching rails-assets-chosen 1.8.7
remote: Installing rails-assets-chosen 1.8.7
remote: Fetching rails-assets-tether 1.4.3
remote: Installing rails-assets-tether 1.4.3
remote: Fetching tilt 2.0.9
remote: Installing tilt 2.0.9
remote: Fetching turbolinks-source 5.2.0
remote: Installing turbolinks-source 5.2.0
remote: Fetching tzinfo 1.2.5
remote: Installing tzinfo 1.2.5
remote: Fetching nokogiri 1.10.1
remote: Installing nokogiri 1.10.1 with native extensions
remote: Fetching i18n 0.9.5
remote: Installing i18n 0.9.5
remote: Fetching websocket-driver 0.7.0
remote: Installing websocket-driver 0.7.0 with native extensions
remote: Fetching mail 2.7.1
remote: Installing mail 2.7.1
remote: Fetching rack-test 1.1.0
remote: Installing rack-test 1.1.0
remote: Fetching sprockets 3.7.2
remote: Installing sprockets 3.7.2
remote: Fetching autoprefixer-rails 9.4.6
remote: Installing autoprefixer-rails 9.4.6
remote: Fetching uglifier 3.2.0
remote: Installing uglifier 3.2.0
remote: Fetching marcel 0.3.3
remote: Installing marcel 0.3.3
remote: Fetching bootstrap-will_paginate 1.0.0
remote: Installing bootstrap-will_paginate 1.0.0
remote: Fetching coffee-script 2.4.1
remote: Installing coffee-script 2.4.1
remote: Fetching rb-inotify 0.10.0
remote: Installing rb-inotify 0.10.0
remote: Fetching turbolinks 5.0.1
remote: Installing turbolinks 5.0.1
remote: Fetching activesupport 5.2.2
remote: Installing activesupport 5.2.2
remote: Fetching faker 1.7.3
remote: Installing faker 1.7.3
remote: Fetching sass-listen 4.0.0
remote: Installing sass-listen 4.0.0
remote: Fetching globalid 0.4.2
remote: Installing globalid 0.4.2
remote: Fetching activemodel 5.2.2
remote: Installing activemodel 5.2.2
remote: Fetching jbuilder 2.7.0
remote: Installing jbuilder 2.7.0
remote: Fetching sass 3.7.3
remote: Installing sass 3.7.3
remote: Fetching activejob 5.2.2
remote: Installing activejob 5.2.2
remote: Fetching activerecord 5.2.2
remote: Installing activerecord 5.2.2
remote: Fetching bootstrap 4.0.0.alpha6
remote: Installing bootstrap 4.0.0.alpha6
remote: Fetching bootstrap-sass 3.3.7
remote: Installing bootstrap-sass 3.3.7
remote: Fetching rails-dom-testing 2.0.3
remote: Fetching loofah 2.2.3
remote: Installing rails-dom-testing 2.0.3
remote: Installing loofah 2.2.3
remote: Fetching rails-html-sanitizer 1.0.4
remote: Installing rails-html-sanitizer 1.0.4
remote: Fetching actionview 5.2.2
remote: Installing actionview 5.2.2
remote: Fetching actionpack 5.2.2
remote: Installing actionpack 5.2.2
remote: Fetching actionmailer 5.2.2
remote: Fetching actioncable 5.2.2
remote: Fetching activestorage 5.2.2
remote: Installing actioncable 5.2.2
remote: Installing actionmailer 5.2.2
remote: Installing activestorage 5.2.2
remote: Fetching railties 5.2.2
remote: Installing railties 5.2.2
remote: Fetching sprockets-rails 3.2.1
remote: Installing sprockets-rails 3.2.1
remote: Fetching simple_form 4.1.0
remote: Installing simple_form 4.1.0
remote: Fetching jquery-rails 4.3.1
remote: Fetching coffee-rails 4.2.2
remote: Fetching rails 5.2.2
remote: Installing rails 5.2.2
remote: Installing coffee-rails 4.2.2
remote: Fetching sass-rails 5.0.6
remote: Installing sass-rails 5.0.6
remote: Installing jquery-rails 4.3.1
remote: Bundle complete! 31 Gemfile dependencies, 71 gems now installed.
remote: Gems in the groups development and test were not installed.
remote: Bundled gems are installed into ./vendor/bundle.
remote: Post-install message from sass:
remote:
remote: Ruby Sass is deprecated and will be unmaintained as of 26 March 2019.
remote:
remote: * If you use Sass as a command-line tool, we recommend using Dart Sass, the new
remote: primary implementation: https://sass-lang.com/install
remote:
remote: * If you use Sass as a plug-in for a Ruby web framework, we recommend using the
remote: sassc gem: https://github.com/sass/sassc-ruby#readme
remote:
remote: * For more details, please refer to the Sass blog:
remote: http://sass.logdown.com/posts/7081811
remote:
remote: Bundle completed (48.73s)
remote: Cleaning up the bundler cache.
remote: Warning: the running version of Bundler (1.15.2) is older than the version that created the lockfile (1.17.3). We suggest you upgrade to the latest version of Bundler by running `gem install bundler`.
remote: The latest bundler is 2.0.1, but you are currently running 1.15.2.
remote: To update, run `gem install bundler`
remote: -----> Installing node-v10.14.1-linux-x64
remote: -----> Detecting rake tasks
remote: -----> Preparing app for Rails asset pipeline
remote: Running: rake assets:precompile
remote: /tmp/build_21f3a603c9f764cf4e2758843744dd99/vendor/bundle/ruby/2.5.0/gems/bootstrap-4.0.0.alpha6/lib/bootstrap/version.rb:2: warning: already initialized constant Bootstrap::VERSION
remote: /tmp/build_21f3a603c9f764cf4e2758843744dd99/vendor/bundle/ruby/2.5.0/gems/bootstrap-sass-3.3.7/lib/bootstrap-sass/version.rb:2: warning: previous definition of VERSION was here
remote: /tmp/build_21f3a603c9f764cf4e2758843744dd99/vendor/bundle/ruby/2.5.0/gems/bootstrap-4.0.0.alpha6/lib/bootstrap/version.rb:3: warning: already initialized constant Bootstrap::BOOTSTRAP_SHA
remote: /tmp/build_21f3a603c9f764cf4e2758843744dd99/vendor/bundle/ruby/2.5.0/gems/bootstrap-sass-3.3.7/lib/bootstrap-sass/version.rb:3: warning: previous definition of BOOTSTRAP_SHA was here
remote: Yarn executable was not detected in the system.
remote: Download Yarn at https://yarnpkg.com/en/docs/install
remote: Asset precompilation completed (2.15s)
remote: Cleaning assets
remote: Running: rake assets:clean
remote: /tmp/build_21f3a603c9f764cf4e2758843744dd99/vendor/bundle/ruby/2.5.0/gems/bootstrap-4.0.0.alpha6/lib/bootstrap/version.rb:2: warning: already initialized constant Bootstrap::VERSION
remote: /tmp/build_21f3a603c9f764cf4e2758843744dd99/vendor/bundle/ruby/2.5.0/gems/bootstrap-sass-3.3.7/lib/bootstrap-sass/version.rb:2: warning: previous definition of VERSION was here
remote: /tmp/build_21f3a603c9f764cf4e2758843744dd99/vendor/bundle/ruby/2.5.0/gems/bootstrap-4.0.0.alpha6/lib/bootstrap/version.rb:3: warning: already initialized constant Bootstrap::BOOTSTRAP_SHA
remote: /tmp/build_21f3a603c9f764cf4e2758843744dd99/vendor/bundle/ruby/2.5.0/gems/bootstrap-sass-3.3.7/lib/bootstrap-sass/version.rb:3: warning: previous definition of BOOTSTRAP_SHA was here
remote: -----> Detecting rails configuration
remote:
remote: ###### WARNING:
remote:
remote: Detecting rails configuration failed
remote: set HEROKU_DEBUG_RAILS_RUNNER=1 to debug
remote:
remote:
remote: -----> Discovering process types
remote: Procfile declares types -> web
remote: Default types for buildpack -> console, rake
remote:
remote: -----> Compressing...
remote: Done: 49M
remote: -----> Launching...
remote: Released v6
remote: https://arcane-depths-69465.herokuapp.com/ deployed to Heroku
remote:
remote: Verifying deploy... done.
To https://git.heroku.com/arcane-depths-69465.git
4eb67f4..70f8752 master -> master
运行heroku run rake db:migrate
/app/vendor/bundle/ruby/2.5.0/gems/bootstrap-4.0.0.alpha6/lib/bootstrap/version.rb:2: warning: already initialized constant Bootstrap::VERSION
/app/vendor/bundle/ruby/2.5.0/gems/bootstrap-sass-3.3.7/lib/bootstrap-sass/version.rb:2: warning: previous definition of VERSION was here
/app/vendor/bundle/ruby/2.5.0/gems/bootstrap-4.0.0.alpha6/lib/bootstrap/version.rb:3: warning: already initialized constant Bootstrap::BOOTSTRAP_SHA
/app/vendor/bundle/ruby/2.5.0/gems/bootstrap-sass-3.3.7/lib/bootstrap-sass/version.rb:3: warning: previous definition of BOOTSTRAP_SHA was here
rake aborted!
LoadError: Error loading the 'sqlite3' Active Record adapter. Missing a gem it depends on? sqlite3 is not part of the bundle. Add it to your Gemfile.
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/rubygems_integration.rb:377:in `block (2 levels) in replace_gem'
/app/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.2/lib/active_record/connection_adapters/sqlite3_adapter.rb:12:in `<top (required)>'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:291:in `require'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:291:in `block in require'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:257:in `load_dependency'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:291:in `require'
/app/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.2/lib/active_record/connection_adapters/connection_specification.rb:191:in `spec'
/app/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:952:in `establish_connection'
/app/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.2/lib/active_record/connection_handling.rb:60:in `establish_connection'
/app/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.2/lib/active_record/railtie.rb:136:in `block (2 levels) in <class:Railtie>'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/lazy_load_hooks.rb:71:in `instance_eval'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/lazy_load_hooks.rb:71:in `block in execute_hook'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/lazy_load_hooks.rb:62:in `with_execution_control'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/lazy_load_hooks.rb:67:in `execute_hook'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/lazy_load_hooks.rb:52:in `block in run_load_hooks'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/lazy_load_hooks.rb:51:in `each'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/lazy_load_hooks.rb:51:in `run_load_hooks'
/app/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.2/lib/active_record/base.rb:328:in `<module:ActiveRecord>'
/app/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.2/lib/active_record/base.rb:27:in `<top (required)>'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:291:in `require'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:291:in `block in require'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:257:in `load_dependency'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:291:in `require'
/app/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.2/lib/active_record/railties/databases.rake:17:in `block (2 levels) in <top (required)>'
/app/vendor/bundle/ruby/2.5.0/gems/rake-12.3.2/exe/rake:27:in `<top (required)>'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/cli/exec.rb:74:in `load'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/cli/exec.rb:74:in `kernel_load'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/cli/exec.rb:27:in `run'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/cli.rb:360:in `exec'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/vendor/thor/lib/thor/invocation.rb:126:in `invoke_command'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/vendor/thor/lib/thor.rb:369:in `dispatch'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/cli.rb:20:in `dispatch'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/vendor/thor/lib/thor/base.rb:444:in `start'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/cli.rb:10:in `start'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/exe/bundle:30:in `block in <top (required)>'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/friendly_errors.rb:121:in `with_friendly_errors'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/exe/bundle:22:in `<top (required)>'
/app/bin/bundle:3:in `load'
/app/bin/bundle:3:in `<main>'
Caused by:
Gem::LoadError: sqlite3 is not part of the bundle. Add it to your Gemfile.
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/rubygems_integration.rb:377:in `block (2 levels) in replace_gem'
/app/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.2/lib/active_record/connection_adapters/sqlite3_adapter.rb:12:in `<top (required)>'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:291:in `require'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:291:in `block in require'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:257:in `load_dependency'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:291:in `require'
/app/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.2/lib/active_record/connection_adapters/connection_specification.rb:191:in `spec'
/app/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:952:in `establish_connection'
/app/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.2/lib/active_record/connection_handling.rb:60:in `establish_connection'
/app/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.2/lib/active_record/railtie.rb:136:in `block (2 levels) in <class:Railtie>'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/lazy_load_hooks.rb:71:in `instance_eval'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/lazy_load_hooks.rb:71:in `block in execute_hook'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/lazy_load_hooks.rb:62:in `with_execution_control'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/lazy_load_hooks.rb:67:in `execute_hook'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/lazy_load_hooks.rb:52:in `block in run_load_hooks'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/lazy_load_hooks.rb:51:in `each'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/lazy_load_hooks.rb:51:in `run_load_hooks'
/app/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.2/lib/active_record/base.rb:328:in `<module:ActiveRecord>'
/app/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.2/lib/active_record/base.rb:27:in `<top (required)>'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:291:in `require'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:291:in `block in require'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:257:in `load_dependency'
/app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:291:in `require'
/app/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.2/lib/active_record/railties/databases.rake:17:in `block (2 levels) in <top (required)>'
/app/vendor/bundle/ruby/2.5.0/gems/rake-12.3.2/exe/rake:27:in `<top (required)>'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/cli/exec.rb:74:in `load'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/cli/exec.rb:74:in `kernel_load'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/cli/exec.rb:27:in `run'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/cli.rb:360:in `exec'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/vendor/thor/lib/thor/invocation.rb:126:in `invoke_command'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/vendor/thor/lib/thor.rb:369:in `dispatch'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/cli.rb:20:in `dispatch'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/vendor/thor/lib/thor/base.rb:444:in `start'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/cli.rb:10:in `start'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/exe/bundle:30:in `block in <top (required)>'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/friendly_errors.rb:121:in `with_friendly_errors'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/exe/bundle:22:in `<top (required)>'
/app/bin/bundle:3:in `load'
/app/bin/bundle:3:in `<main>'
Tasks: TOP => db:migrate => db:load_config
(See full trace by running task with --trace)
答案 0 :(得分：0)
您需要将sqlite3 gem添加到Gemfile并在database.yml上指定数据库。
宝石文件
# Use sqlite3 as the database for Active Record
gem 'sqlite3'
config / database.yml
# SQLite version 3.x
# gem install sqlite3
#
# Ensure the SQLite 3 gem is defined in your Gemfile
# gem 'sqlite3'
#
default: &default
adapter: sqlite3
pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
timeout: 5000
development:
<<: *default
database: db/development.sqlite3
# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
<<: *default
database: db/test.sqlite3
production:
<<: *default
database: db/production.sqlite3
注意：因为heroku的工作方式不能使用sqlite，所以请改用postgres
SQLite在内存中运行，并将其数据存储备份到磁盘上的文件中。 尽管此策略对开发非常有效，但Heroku的Cedar堆栈 具有临时文件系统。您可以写，也可以读 从中删除，但内容将定期清除。如果你要 在Heroku上使用SQLite，至少会丢失整个数据库 每24小时一次。