无法解决ROR的依存关系问题

Question

我对这个ROR应用程序还很陌生，所以请理解我描述问题的措辞是否准确。

我现在正在尝试复制以下github在做什么。

https://github.com/harrystech/prelaunchr

我正在弄清Developer Setup部分，但是当我执行时

bundle exec rake db:migrate

我的命令中的结果是：

  

回溯（最近通话最近）：20：起   /home/leesungyong/.rbenv/versions/2.5.3/bin/rake:23:in <main>' 19: from /home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/rubygems.rb:309:in activate_bin_path'18：来自   /home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/rubygems.rb:309:in   synchronize' 17: from /home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/rubygems.rb:311:in 封锁Activate_bin_path'16：中的   /home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/rubygems.rb:243:in   finish_resolve' 15: from /home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/rubygems/request_set.rb:397:in resolve_current'14：来自   /home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/rubygems/request_set.rb:385:in   resolve' 13: from /home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/rubygems/resolver.rb:188:in 解决“ 12：来自   /home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/rubygems/resolver/molinillo/lib/molinillo/resolver.rb:42:in   resolve' 11: from /home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/rubygems/resolver/molinillo/lib/molinillo/resolution.rb:64:in 解决“ 10：来自   /home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/rubygems/resolver/molinillo/lib/molinillo/resolution.rb:106:in   start_resolution' 9: from /home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/rubygems/resolver/molinillo/lib/molinillo/resolution.rb:165:in initial_state'8：来自   /home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/rubygems/resolver/molinillo/lib/molinillo/delegates/specification_provider.rb:51:in   sort_dependencies' 7: from /home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/rubygems/resolver/molinillo/lib/molinillo/delegates/specification_provider.rb:69:in with_no_such_dependency_error_handling'6：来自   /home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/rubygems/resolver/molinillo/lib/molinillo/delegates/specification_provider.rb:52:in   block in sort_dependencies' 5: from /home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/rubygems/resolver.rb:277:in sort_dependencies'4：来自   /home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/rubygems/resolver.rb:277:in   with_index' 3: from /home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/rubygems/resolver.rb:277:in sort_by'2：来自   /home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/rubygems/resolver.rb:277:in   each' 1: from /home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/rubygems/resolver.rb:283:in 封锁sort_dependencies'   /home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/rubygems/resolver.rb:231:in   `search_for'：无法解决依赖性：用户请求   'did_you_mean（= 1.2.0）'（Gem :: UnsatisfiableDependencyError）

通过我使用ubuntu的方式。

好的，我在错误处理方面取得了一些进展。我发现捆绑器可能存在版本错误，必须使用 bundler -v 1.15.0.pre.3 。所以我做了如下，但是这次，当我做

bundle exec rake db:create

输出为

could not connect to server: Connection refused
    Is the server running on host "localhost" (127.0.0.1) and accepting
    TCP/IP connections on port 5432?
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/postgresql_adapter.rb:651:in `initialize'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/postgresql_adapter.rb:651:in `new'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/postgresql_adapter.rb:651:in `connect'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/postgresql_adapter.rb:242:in `initialize'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/postgresql_adapter.rb:44:in `new'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/postgresql_adapter.rb:44:in `postgresql_connection'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:438:in `new_connection'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:448:in `checkout_new_connection'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:422:in `acquire_connection'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:349:in `block in checkout'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/monitor.rb:226:in `mon_synchronize'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:348:in `checkout'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:263:in `block in connection'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/monitor.rb:226:in `mon_synchronize'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:262:in `connection'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:571:in `retrieve_connection'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_handling.rb:113:in `retrieve_connection'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_handling.rb:87:in `connection'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/tasks/postgresql_database_tasks.rb:6:in `connection'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/tasks/postgresql_database_tasks.rb:15:in `create'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/tasks/database_tasks.rb:93:in `create'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/tasks/database_tasks.rb:107:in `block in create_current'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/tasks/database_tasks.rb:278:in `block in each_current_configuration'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/tasks/database_tasks.rb:277:in `each'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/tasks/database_tasks.rb:277:in `each_current_configuration'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/tasks/database_tasks.rb:106:in `create_current'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/railties/databases.rake:17:in `block (2 levels) in <top (required)>'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/task.rb:273:in `block in execute'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/task.rb:273:in `each'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/task.rb:273:in `execute'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/task.rb:214:in `block in invoke_with_call_chain'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/monitor.rb:226:in `mon_synchronize'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/task.rb:194:in `invoke_with_call_chain'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/task.rb:183:in `invoke'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/application.rb:160:in `invoke_task'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/application.rb:116:in `block (2 levels) in top_level'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/application.rb:116:in `each'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/application.rb:116:in `block in top_level'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/application.rb:125:in `run_with_threads'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/application.rb:110:in `top_level'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/application.rb:83:in `block in run'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/application.rb:186:in `standard_exception_handling'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/application.rb:80:in `run'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/exe/rake:27:in `<top (required)>'
/home/leesungyong/.rbenv/versions/2.5.3/bin/rake:23:in `load'
/home/leesungyong/.rbenv/versions/2.5.3/bin/rake:23:in `<top (required)>'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/lib/bundler/cli/exec.rb:74:in `load'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/lib/bundler/cli/exec.rb:74:in `kernel_load'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/lib/bundler/cli/exec.rb:27:in `run'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/lib/bundler/cli.rb:360:in `exec'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/lib/bundler/vendor/thor/lib/thor/invocation.rb:126:in `invoke_command'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/lib/bundler/vendor/thor/lib/thor.rb:369:in `dispatch'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/lib/bundler/cli.rb:20:in `dispatch'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/lib/bundler/vendor/thor/lib/thor/base.rb:444:in `start'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/lib/bundler/cli.rb:10:in `start'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/exe/bundle:35:in `block in <top (required)>'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/lib/bundler/friendly_errors.rb:121:in `with_friendly_errors'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/exe/bundle:27:in `<top (required)>'
/home/leesungyong/.rbenv/versions/2.5.3/bin/bundle:23:in `load'
/home/leesungyong/.rbenv/versions/2.5.3/bin/bundle:23:in `<main>'
Couldn't create database for {"adapter"=>"postgresql", "database"=>"prelaunchr_development", "host"=>"localhost"}
could not connect to server: Connection refused
    Is the server running on host "localhost" (127.0.0.1) and accepting
    TCP/IP connections on port 5432?
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/postgresql_adapter.rb:651:in `initialize'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/postgresql_adapter.rb:651:in `new'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/postgresql_adapter.rb:651:in `connect'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/postgresql_adapter.rb:242:in `initialize'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/postgresql_adapter.rb:44:in `new'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/postgresql_adapter.rb:44:in `postgresql_connection'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:438:in `new_connection'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:448:in `checkout_new_connection'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:422:in `acquire_connection'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:349:in `block in checkout'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/monitor.rb:226:in `mon_synchronize'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:348:in `checkout'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:263:in `block in connection'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/monitor.rb:226:in `mon_synchronize'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:262:in `connection'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:571:in `retrieve_connection'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_handling.rb:113:in `retrieve_connection'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/connection_handling.rb:87:in `connection'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/tasks/postgresql_database_tasks.rb:6:in `connection'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/tasks/postgresql_database_tasks.rb:15:in `create'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/tasks/database_tasks.rb:93:in `create'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/tasks/database_tasks.rb:107:in `block in create_current'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/tasks/database_tasks.rb:278:in `block in each_current_configuration'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/tasks/database_tasks.rb:277:in `each'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/tasks/database_tasks.rb:277:in `each_current_configuration'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/tasks/database_tasks.rb:106:in `create_current'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-4.2.11/lib/active_record/railties/databases.rake:17:in `block (2 levels) in <top (required)>'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/task.rb:273:in `block in execute'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/task.rb:273:in `each'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/task.rb:273:in `execute'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/task.rb:214:in `block in invoke_with_call_chain'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/2.5.0/monitor.rb:226:in `mon_synchronize'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/task.rb:194:in `invoke_with_call_chain'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/task.rb:183:in `invoke'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/application.rb:160:in `invoke_task'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/application.rb:116:in `block (2 levels) in top_level'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/application.rb:116:in `each'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/application.rb:116:in `block in top_level'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/application.rb:125:in `run_with_threads'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/application.rb:110:in `top_level'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/application.rb:83:in `block in run'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/application.rb:186:in `standard_exception_handling'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/lib/rake/application.rb:80:in `run'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rake-12.3.2/exe/rake:27:in `<top (required)>'
/home/leesungyong/.rbenv/versions/2.5.3/bin/rake:23:in `load'
/home/leesungyong/.rbenv/versions/2.5.3/bin/rake:23:in `<top (required)>'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/lib/bundler/cli/exec.rb:74:in `load'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/lib/bundler/cli/exec.rb:74:in `kernel_load'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/lib/bundler/cli/exec.rb:27:in `run'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/lib/bundler/cli.rb:360:in `exec'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/lib/bundler/vendor/thor/lib/thor/invocation.rb:126:in `invoke_command'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/lib/bundler/vendor/thor/lib/thor.rb:369:in `dispatch'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/lib/bundler/cli.rb:20:in `dispatch'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/lib/bundler/vendor/thor/lib/thor/base.rb:444:in `start'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/lib/bundler/cli.rb:10:in `start'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/exe/bundle:35:in `block in <top (required)>'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/lib/bundler/friendly_errors.rb:121:in `with_friendly_errors'
/home/leesungyong/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/bundler-1.15.0.pre.3/exe/bundle:27:in `<top (required)>'
/home/leesungyong/.rbenv/versions/2.5.3/bin/bundle:23:in `load'
/home/leesungyong/.rbenv/versions/2.5.3/bin/bundle:23:in `<main>'
Couldn't create database for {"adapter"=>"postgresql", "database"=>"prelaunchr_test", "host"=>"localhost"}

我对ROR大楼感到非常厌倦。有人可以帮助我吗？