如果被困在这里，我很友善。 调用active_record/home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/railties-4.2.5.1/lib/rails/application/configuration.rb：110：in database_configuration': Cannot load Rails.application.database_configuration : (RuntimeError)
Could not load database configuration. No such file - ["config/database.yml"]
from /home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/railtie.rb:117:in块(2个级别(在' 来自/home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/lazy_load_hooks.rb：38：IN instance_eval'
from /home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/lazy_load_hooks.rb:38:in execute_hook' 来自/home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/lazy_load_hooks.rb：45：in block in run_load_hooks'
from /home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/lazy_load_hooks.rb:44:in from/home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/lazy_load_hooks.rb：44：in run_load_hooks'
from /home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/base.rb:315:in ' from/home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/base.rb：26：in <top (required)>'
from /home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/railties-4.2.5.1/lib/rails/generators/named_base.rb:179:in pluralize_table_names？ 来自/home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/railties-4.2.5.1/lib/rails/generators/named_base.rb：119：in table_name'
from /home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/activerecord-4.2.5.1/lib/rails/generators/active_record/model/model_generator.rb:21:in create_migration_file' 来自/home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/thor-0.19.1/lib/thor/command.rb：27：in run'
from /home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/thor-0.19.1/lib/thor/invocation.rb:126:in invoke_command' 来自/home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/thor-0.19.1/lib/thor/invocation.rb：133：in block in invoke_all'
from /home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/thor-0.19.1/lib/thor/invocation.rb:133:in 来自/home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/thor-0.19.1/lib/thor/invocation.rb：133：in map'
from /home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/thor-0.19.1/lib/thor/invocation.rb:133:in invoke_all' from/home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/thor-0.19.1/lib/thor/group.rb：232：in dispatch'
from /home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/thor-0.19.1/lib/thor/invocation.rb:115:in invoke' 来自/home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/thor-0.19.1/lib/thor/group.rb：277：in block in _invoke_for_class_method'
from /home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/thor-0.19.1/lib/thor/shell.rb:68:in with_padding' 来自/home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/thor-0.19.1/lib/thor/group.rb：266：in _invoke_for_class_method'
from /home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/thor-0.19.1/lib/thor/group.rb:133:in _invoke_from_option_orm' from/home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/thor-0.19.1/lib/thor/command.rb：27：in run'
from /home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/thor-0.19.1/lib/thor/invocation.rb:126:in invoke_command' 来自/home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/thor-0.19.1/lib/thor/invocation.rb：133：in block in invoke_all'
from /home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/thor-0.19.1/lib/thor/invocation.rb:133:in 来自/home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/thor-0.19.1/lib/thor/invocation.rb：133：in map'
from /home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/thor-0.19.1/lib/thor/invocation.rb:133:in invoke_all' 来自/home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/thor-0.19.1/lib/thor/group.rb：232：in dispatch'
from /home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/thor-0.19.1/lib/thor/base.rb:440:in开始' from/home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/railties-4.2.5.1/lib/rails/generators.rb：157：in invoke'
from /home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/railties-4.2.5.1/lib/rails/commands/generate.rb:13:in ' from/home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb：274：in require'
from /home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in block in require' from/home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb：240：in load_dependency'
from /home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in require' 来自/home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/railties-4.2.5.1/lib/rails/command/commands_tasks.rb：123：IN require_command!'
from /home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:130:in generate_or_destroy' 来自/home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/railties-4.2.5.1/lib/rails/command/commands_tasks.rb：50：in generate'
from /home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:39:in run_command！ from/home/frank/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0/gems/railties-4.2.5.1/lib/rails/command.rb：17：in <top (required)>'
from bin/rails:4:in require' 从箱/轨：4：在">
错误是说您没有database.yml文件
Could not load database configuration. No such file - ["config/database.yml"]
请检查您的config目录。你能看到database.yml文件吗？
当涉及到Linux操作系统时，我建议使用RVM而不是RBenv，而且安装起来非常容易。以下是您需要执行的操作：
确保安装 curl
sudo apt-get install curl
然后访问RVM的主页 https://rvm.io/
通过复制并粘贴以下内容来添加密钥：
gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3
然后使用以下命令在 Rails 4 中：
curl -sSL https://get.rvm.io | bash -s stable --rails
安装完成后，请执行以下操作：
/home/<whatever your username is>/.rvm/scripts/rvm
rvm requirements
检查以确保使用以下命令安装了 Ruby、Ruby Gem 和 Rails：
ruby -v && gem -v && rails -v
您现在应该能够使用以下命令制作简单的 rails 应用程序：
rails new testapp