我试图在Heroku上更新我的Rails 5.2.1应用程序，但出现此错误。
remote: -----> Installing dependencies
remote: Installing node modules (yarn.lock)
remote: yarn install v1.17.2
remote: [1/4] Resolving packages...
remote: [2/4] Fetching packages...
remote: error An unexpected error occurred: "https://registry.yarnpkg.com/websocket-driver/-/websocket-driver-0.7.2.tgz: Request failed \"404 Not Found\"".
remote: info If you think this is a bug, please open a bug report with the information provided in "/tmp/build_053b37334aad96876abbe953fb52fde5/yarn-error.log".
remote: info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.
remote:
remote: -----> Build failed
remote:
remote: We're sorry this build is failing! You can troubleshoot …我是第一次使用travis，不知道如何在其中正确添加webpacker？
这是我现在在.travis.yml中拥有的
language: ruby
rvm:
- 2.4.4
addons:
postgresql: "9.4"
before_install:
- "echo 'gem: --no-document' > ~/.gemrc"
- "echo '--colour' > ~/.rspec"
- export DISPLAY=:99.0
- sh -e /etc/init.d/xvfb start
before_script:
- bundle exec rake db:create db:migrate RAILS_ENV=test
- bundle exec rails webpacker:compile
这是构建错误
$ bundle exec rails webpacker:compile
Webpacker is installed
Using /home/travis/build/bill/ivan/config/webpacker.yml file for setting up webpack paths
Compiling…
Compilation failed:
/home/travis/build/bill/ivan/vendor/bundle/ruby/2.4.0/gems/webpacker-3.5.5/lib/webpacker/webpack_runner.rb:11:in `exec': No such file or directory - /home/travis/build/bill/ivan/node_modules/.bin/webpack (Errno::ENOENT)
from /home/travis/build/bill/ivan/vendor/bundle/ruby/2.4.0/gems/webpacker-3.5.5/lib/webpacker/webpack_runner.rb:11:in `block in …我面临一个小问题...我正要在Exercism.io上开始一些Kata练习，当我运行测试时，我有一个 Gem:ConflictError
/Users/john/.rbenv/versions/2.4.1/lib/ruby/site_ruby/2.4.0/rubygems/specification.rb:2325:in `raise_if_conflicts': Unable to activate railties-5.1.4, because activesupport-5.1.5 conflicts with activesupport (= 5.1.4) (Gem::ConflictError)
from /Users/john/.rbenv/versions/2.4.1/lib/ruby/site_ruby/2.4.0/rubygems/specification.rb:1438:in `activate'
from /Users/john/.rbenv/versions/2.4.1/lib/ruby/site_ruby/2.4.0/rubygems.rb:224:in `rescue in try_activate'
from /Users/john/.rbenv/versions/2.4.1/lib/ruby/site_ruby/2.4.0/rubygems.rb:217:in `try_activate'
from /Users/john/.rbenv/versions/2.4.1/lib/ruby/site_ruby/2.4.0/rubygems/core_ext/kernel_require.rb:128:in `rescue in require'
from /Users/john/.rbenv/versions/2.4.1/lib/ruby/site_ruby/2.4.0/rubygems/core_ext/kernel_require.rb:40:in `require'
from /Users/john/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/railties-5.1.4/lib/minitest/rails_plugin.rb:2:in `<top (required)>'
from /Users/john/.rbenv/versions/2.4.1/lib/ruby/site_ruby/2.4.0/rubygems/core_ext/kernel_require.rb:59:in `require'
from /Users/john/.rbenv/versions/2.4.1/lib/ruby/site_ruby/2.4.0/rubygems/core_ext/kernel_require.rb:59:in `require'
from /Users/john/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/minitest-5.11.3/lib/minitest.rb:98:in `block in load_plugins'
from /Users/john/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/minitest-5.11.3/lib/minitest.rb:92:in `each'
from /Users/john/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/minitest-5.11.3/lib/minitest.rb:92:in `load_plugins'
from /Users/john/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/minitest-5.11.3/lib/minitest.rb:121:in `run'
from /Users/john/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/minitest-5.11.3/lib/minitest.rb:63:in `block in autorun'
我不确定该怎么办...
在我的网店我有表产品和尺寸，还我想我需要添加一个表补货
我想与其更新产品，不如拥有一个库存表，然后我可以跟踪添加任何新尺寸，新数量，为什么不添加新价格（买卖）的日期并创建统计信息...
你说的对吗？
一旦补货创建，相应的产品与新的数量和价格更新？
好，
因此它以这种方式开始：
#Product
has_many :sizes
accepts_nested_attributes_for :sizes, reject_if: :all_blank, allow_destroy: true
#Size
belongs_to :product
该补充库存表需要有大小的属性（如产品）
我相信我必须使用多态关联，但是应该如何更新架构，应该添加，删除哪些内容？
因此，由于我添加了“ 补货”模型，因此我的模型如下所示：
#Product
has_many :sizes, inverse_of: :product, dependent: :destroy, as: :sizeable
has_many :restockings
accepts_nested_attributes_for :sizes, reject_if: :all_blank, allow_destroy: true
#Restocking
has_many :sizes, as: :sizeable
belongs_to :product
accepts_nested_attributes_for :sizes, reject_if: :all_blank, allow_destroy: true
#Size
belongs_to :product
belongs_to :restocking
belongs_to :sizeable, polymorphic: true, class_name: "Size"
schema.rb
create_table "sizes", force: :cascade …