我有一个 Rails 项目并使用 RSpec 进行测试。最近,我在我的 spec_helper.rb
中添加了这个:
config.before(:suite) do
Rails.application.load_tasks
end
如果我使用 bundle exec rspec
在本地运行测试,一切都很好。但是当我尝试在 Travis CI 上做同样的事情时,命令崩溃了:
TypeError: superclass mismatch for class Task
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/sprockets-rails-3.2.1/lib/sprockets/rails/task.rb:9:in `<module:Rails>'
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/sprockets-rails-3.2.1/lib/sprockets/rails/task.rb:8:in `<module:Sprockets>'
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/sprockets-rails-3.2.1/lib/sprockets/rails/task.rb:7:in `<top (required)>'
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.9/lib/active_support/dependencies.rb:274:in `require'
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.9/lib/active_support/dependencies.rb:274:in `block in require'
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.9/lib/active_support/dependencies.rb:240:in `load_dependency'
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.9/lib/active_support/dependencies.rb:274:in `require'
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/sprockets-rails-3.2.1/lib/sprockets/railtie.rb:163:in `block in <class:Railtie>'
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/railties-4.2.9/lib/rails/railtie.rb:237:in `instance_exec'
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/railties-4.2.9/lib/rails/railtie.rb:237:in `block in run_tasks_blocks'
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/railties-4.2.9/lib/rails/railtie.rb:245:in `each'
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/railties-4.2.9/lib/rails/railtie.rb:245:in `each_registered_block'
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/railties-4.2.9/lib/rails/railtie.rb:237:in `run_tasks_blocks'
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/railties-4.2.9/lib/rails/application.rb:451:in `block in run_tasks_blocks'
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/railties-4.2.9/lib/rails/engine/railties.rb:13:in `each'
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/railties-4.2.9/lib/rails/engine/railties.rb:13:in `each'
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/railties-4.2.9/lib/rails/application.rb:451:in `run_tasks_blocks'
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/railties-4.2.9/lib/rails/engine.rb:453:in `load_tasks'
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/railties-4.2.9/lib/rails/railtie.rb:194:in `public_send'
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/railties-4.2.9/lib/rails/railtie.rb:194:in `method_missing'
from (irb):25
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/railties-4.2.9/lib/rails/commands/console.rb:110:in `start'
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/railties-4.2.9/lib/rails/commands/console.rb:9:in `start'
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/railties-4.2.9/lib/rails/commands/commands_tasks.rb:68:in `console'
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/railties-4.2.9/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
from /home/travis/build/my_application/vendor/bundle/ruby/2.3.0/gems/railties-4.2.9/lib/rails/commands.rb:17:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'
如果我调试 Travis 构建并手动启动 bundle exec rails c
并执行 Rails.application.load_tasks
,也会发生同样的事情。
这可能是什么问题?任何线索将不胜感激!
最佳答案
TypeError: superclass mismatch
发生在您重新打开一个类并尝试为其重新定义父类(super class)时。这是强制出现此错误的一种方法:
class A; end
class B < A; end
class C; end
class B < C; end # raises error
因为这只发生在 Travis 环境中,所以如果可能的话我会在那里调试它:
- 用vim nano 或类似的 CLI 编辑器
- 把
要求“ pry ”; binding.pry
,在导致错误的行之上 捆绑安装
- 重新运行您的测试代码
- 进入调试器并检查
Task
来自哪里。由于您收到TypeError: superclass mismatch
,因此Task
必须在重新打开它的这一行之前定义。show-source Task
应该会显示它的定义位置。
关于ruby-on-rails - 类型错误 : superclass mismatch for class Task,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/46472997/