Ruby on rails Rake db:create不工作

运行rake db:create不起作用。以下是stacktrace：

/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activesupport-3.2.13/lib/active_support/values/time_zone.rb:270: warning: circular argument reference - now
rake aborted!
LoadError: Please install the postgresql adapter: `gem install activerecord-postgresql-adapter` (pg is not part of the bundle. Add it to your Gemfile.)

/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/bundler-1.15.2/lib/bundler/rubygems_integration.rb:377:in `block (2 levels) in replace_gem'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:7:in `<top (required)>'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `require'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `block in require'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:236:in `load_dependency'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `require'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_specification.rb:50:in `resolve_hash_connection'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_specification.rb:29:in `spec'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_specification.rb:130:in `establish_connection'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active_record/railties/databases.rake:101:in `create_database'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active_record/railties/databases.rake:62:in `block (3 levels) in <top (required)>'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active_record/railties/databases.rake:62:in `each'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active_record/railties/databases.rake:62:in `block (2 levels) in <top (required)>'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/rake-12.0.0/exe/rake:27:in `<top (required)>'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/bin/ruby_executable_hooks:15:in `eval'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/bin/ruby_executable_hooks:15:in `<main>'

Gem::LoadError: pg is not part of the bundle. Add it to your Gemfile.
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/bundler-1.15.2/lib/bundler/rubygems_integration.rb:377:in `block (2 levels) in replace_gem'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:7:in `<top (required)>'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `require'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `block in require'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:236:in `load_dependency'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `require'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_specification.rb:50:in `resolve_hash_connection'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_specification.rb:29:in `spec'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_specification.rb:130:in `establish_connection'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active_record/railties/databases.rake:101:in `create_database'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active_record/railties/databases.rake:62:in `block (3 levels) in <top (required)>'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active_record/railties/databases.rake:62:in `each'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active_record/railties/databases.rake:62:in `block (2 levels) in <top (required)>'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/rake-12.0.0/exe/rake:27:in `<top (required)>'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/bin/ruby_executable_hooks:15:in `eval'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/bin/ruby_executable_hooks:15:in `<main>'

Tasks: TOP => db:create
(See full trace by running task with --trace)

---

/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activesupport-3.2.13/lib/active\u support/values/time\u zone.rb:270:警告：循环参数参考-现在
雷克流产了！
LoadError:请安装postgresql适配器：`gem安装activerecord postgresql适配器`（pg不是捆绑包的一部分。请将其添加到gem文件中。）
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/bundler-1.15.2/lib/bundler/rubygems_integration.rb:377:in`block（2层）in replace_gem'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active\u record/connection\u adapters/postgresql\u adapter.rb:7:in`'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activesupport-3.2.13/lib/active\u support/dependencies.rb:251:in'require'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activesupport-3.2.13/lib/active\u support/dependencies.rb:251:在“请求中的块”中
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activesupport-3.2.13/lib/active\u support/dependencies.rb:236:in'load\u dependency'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activesupport-3.2.13/lib/active\u support/dependencies.rb:251:in'require'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active\u record/connection\u adapters/abstract/connection\u specification.rb:50:in`resolve\u hash\u connection'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active\u record/connection\u adapters/abstract/connection\u specification.rb:29:in'spec'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active\u record/connection\u adapters/abstract/connection\u specification.rb:130:在“建立连接”中
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active\u record/railties/databases.rake:101:in'create\u database'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active_record/railties/databases.rake:62:in“block（3层）in”
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active_record/railties/databases.rake:62:in'each'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active_record/railties/databases.rake:62:in“block（2层）in”
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/rake-12.0.0/exe/rake:27:in`'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/bin/ruby\u executable\u hooks:15:in'eval'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/bin/ruby\u executable\u hooks:15:in`'
Gem:：LoadError:pg不是捆绑包的一部分。将其添加到您的文件中。
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/bundler-1.15.2/lib/bundler/rubygems_integration.rb:377:in`block（2层）in replace_gem'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active\u record/connection\u adapters/postgresql\u adapter.rb:7:in`'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activesupport-3.2.13/lib/active\u support/dependencies.rb:251:in'require'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activesupport-3.2.13/lib/active\u support/dependencies.rb:251:在“请求中的块”中
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activesupport-3.2.13/lib/active\u support/dependencies.rb:236:in'load\u dependency'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activesupport-3.2.13/lib/active\u support/dependencies.rb:251:in'require'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active\u record/connection\u adapters/abstract/connection\u specification.rb:50:in`resolve\u hash\u connection'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active\u record/connection\u adapters/abstract/connection\u specification.rb:29:in'spec'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active\u record/connection\u adapters/abstract/connection\u specification.rb:130:在“建立连接”中
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active\u record/railties/databases.rake:101:in'create\u database'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active_record/railties/databases.rake:62:in“block（3层）in”
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active_record/railties/databases.rake:62:in'each'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/activerecord-3.2.13/lib/active_record/railties/databases.rake:62:in“block（2层）in”
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/gems/rake-12.0.0/exe/rake:27:in`'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/bin/ruby\u executable\u hooks:15:in'eval'
/Users/mounikasmitha/.rvm/gems/ruby-2.4.0/bin/ruby\u executable\u hooks:15:in`'
任务：TOP=>db:create
（通过使用--trace运行任务查看完整跟踪）

错误显示：

pg不是捆绑包的一部分。将其添加到您的文件中

要做到这一点，只需转到Rails应用程序目录，打开

Gemfile

，并将以下内容放入其中

配置示例： 档案： database.yml

default:&default
适配器：postgresql
编码：unicode
游泳池：5
用户名：postgres
密码：
超时：5000
发展：
错误显示：

pg不是捆绑包的一部分。将其添加到您的文件中

要做到这一点，只需转到Rails应用程序目录，打开
Gemfile
，并将以下内容放入其中

配置示例：
档案：
database.yml
default:&default
适配器：postgresql
编码：unicode
游泳池：5
用户名：postgres
密码：
超时：5000
发展：
更新所有捆绑包gem，然后尝试创建数据库。请发布您的gemfile更新所有捆绑包gem，然后尝试创建数据库。请发布您的gemfile无法为{“adapter”=>“postgresql”、“encoding”=>“unicode”、“database”=>“myapp\u test”、“pool”=>5、“username”=>“myapp”、“password”=>nil}创建数据库现在它给出了这个错误您是否有一个正在运行的PostgreSQL实例，该实例的用户/角色
myapp
被授予
connect
和
create
？否，那么我应该在postgresqlYes中为我的应用创建一个用户/角色，只需创建
# Use PostgreSQL as the database for Active Record
gem 'pg'

default: &default
  adapter: postgresql
  encoding: unicode
  pool: 5
  username: postgres
  password: 
  timeout: 5000

development:
  <<: *default
  database: myawesomeapp_dev

# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
  <<: *default
  database: myawesomeapp_test

production:
  <<: *default
  database: myawesomeapp_prod