Ruby on rails heroku上载错误无法检测到rake任务

我现在正试图将我的应用程序上传到heroku，因为它只是纯粹的设计，不需要数据库连接。我在上传时不断遇到这个错误

Your bundle is complete!
remote:        Gems in the groups development and test were not installed.
remote:        It was installed into ./vendor/bundle
remote:        Bundle completed (1.06s)
remote:        Cleaning up the bundler cache.
remote:        Could not detect rake tasks
remote:        ensure you can run `$ bundle exec rake -P` against your app with no environment variables present
remote:        and using the production group of your Gemfile.
remote:        rake aborted!
remote:        URI::InvalidURIError: bad URI(is not URI?): ://user:pass@127.0.0.1/dbname
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/ruby-2.0.0/lib/ruby/2.0.0/uri/common.rb:176:in `split'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/ruby-2.0.0/lib/ruby/2.0.0/uri/common.rb:211:in `parse'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/ruby-2.0.0/lib/ruby/2.0.0/uri/common.rb:747:in `parse'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/activerecord-4.1.4/lib/active_record/connection_adapters/connection_specification.rb:35:in `initialize'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/activerecord-4.1.4/lib/active_record/connection_adapters/connection_specification.rb:279:in `new'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/activerecord-4.1.4/lib/active_record/connection_adapters/connection_specification.rb:279:in `resolve_url_connection'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/activerecord-4.1.4/lib/active_record/connection_adapters/connection_specification.rb:242:in `resolve_string_connection'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/activerecord-4.1.4/lib/active_record/connection_adapters/connection_specification.rb:267:in `resolve_hash_connection'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/activerecord-4.1.4/lib/active_record/connection_adapters/connection_specification.rb:228:in `resolve_connection'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/activerecord-4.1.4/lib/active_record/connection_adapters/connection_specification.rb:152:in `resolve'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/activerecord-4.1.4/lib/active_record/connection_adapters/connection_specification.rb:164:in `block in resolve_all'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/activerecord-4.1.4/lib/active_record/connection_adapters/connection_specification.rb:163:in `each'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/activerecord-4.1.4/lib/active_record/connection_adapters/connection_specification.rb:163:in `resolve_all'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/activerecord-4.1.4/lib/active_record/connection_handling.rb:69:in `resolve'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/activerecord-4.1.4/lib/active_record/core.rb:46:in `configurations='
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/activerecord-4.1.4/lib/active_record/core.rb:48:in `block in <module:Core>'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/activesupport-4.1.4/lib/active_support/concern.rb:120:in `class_eval'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/activesupport-4.1.4/lib/active_support/concern.rb:120:in `append_features'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/activerecord-4.1.4/lib/active_record/base.rb:297:in `include'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/activerecord-4.1.4/lib/active_record/base.rb:297:in `<class:Base>'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/activerecord-4.1.4/lib/active_record/base.rb:282:in `<module:ActiveRecord>'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/activerecord-4.1.4/lib/active_record/base.rb:23:in `<top (required)>'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/activerecord-4.1.4/lib/active_record/railtie.rb:39:in `require'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/activerecord-4.1.4/lib/active_record/railtie.rb:39:in `block in <class:Railtie>'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/railties-4.1.4/lib/rails/railtie.rb:237:in `instance_exec'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/railties-4.1.4/lib/rails/railtie.rb:237:in `block in run_tasks_blocks'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/railties-4.1.4/lib/rails/railtie.rb:245:in `each'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/railties-4.1.4/lib/rails/railtie.rb:245:in `each_registered_block'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/railties-4.1.4/lib/rails/railtie.rb:237:in `run_tasks_blocks'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/railties-4.1.4/lib/rails/application.rb:373:in `block in run_tasks_blocks'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/railties-4.1.4/lib/rails/engine/railties.rb:13:in `each'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/railties-4.1.4/lib/rails/engine/railties.rb:13:in `each'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/railties-4.1.4/lib/rails/application.rb:373:in `run_tasks_blocks'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/railties-4.1.4/lib/rails/engine.rb:449:in `load_tasks'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/Rakefile:6:in `<top (required)>'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/rake_module.rb:28:in `load'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/rake_module.rb:28:in `load_rakefile'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:689:in `raw_load_rakefile'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:94:in `block in load_rakefile'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:176:in `standard_exception_handling'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:93:in `load_rakefile'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:77:in `block in run'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:176:in `standard_exception_handling'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:75:in `run'
remote:        /tmp/build_1f483b69aed84c97fc81983578b0b4e9/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/bin/rake:33:in `<top (required)>'
remote:        vendor/bundle/bin/rake:16:in `load'
remote:        vendor/bundle/bin/rake:16:in `<main>'
remote: 
remote: ###### WARNING:
remote:        No Procfile detected, using the default web server (webrick)
remote:        https://devcenter.heroku.com/articles/ruby-default-web-server
remote: 
remote: -----> Discovering process types
remote:        Procfile declares types -> (none)
remote:        Default types for Ruby  -> console, rake, web, worker
remote: 
remote: -----> Compressing... done, 30.6MB
remote: -----> Launching... done, v14
remote:        https://teknolohiya.herokuapp.com/ deployed to Heroku
remote: 
remote: Verifying deploy... done.
To https://git.heroku.com/teknolohiya.git
   897dd11..5ac0b58  master -> master

检查日志（heroku日志） 使用google chrome开发者工具检查网络响应（右键单击，检查元素）

我正在看这个错误

URI:：InvalidURIError:错误的URI（不是URI？：//用户：pass@127.0.0.1/数据库名

我猜这和你的路线有关。显示routes.rb文件您是否声明了站点的根目录？

根目录“欢迎#索引”

我刚刚遇到了这个问题，可能不是您的问题，但问题是Heroku正在尝试调用数据库URL。我提供了一个免费的postgres db（即使我们没有在项目中使用它），并且能够解决这个问题。

你能给我看一下任务吗？什么版本的rails？你能显示日志吗？运行heroku日志。这是一个很好的分步指南

Rails.application.routes.draw do  
  #root
  root 'home#index'

  #welcome
  get 'welcome' => 'welcome#index'

  #about
  get 'about' => 'about#index'  

  #contact
  get 'contact' => 'contact#index'  

end