Postgres 13.2 on rails 5.2.4.1: ActiveRecord::NoDatabaseError: FATAL: database * does not exist on r

Posted 2023-04-12

【中文标题】Postgres 13.2 on rails 5.2.4.1: ActiveRecord::NoDatabaseError: FATAL: database * does not exist on rake db:create

【英文标题】：

【发布时间】：2021-03-05 07:51:47

【问题描述】：

我正在尝试在本地的 macOS Catalina 10.15.7、rails 5.2.4 和 postgres 13.2 上设置项目。 但是当我尝试通过运行rake db:create 或bundle exec rake db:create 或rails db:create 创建数据库时，都会导致相同的错误。 错误日志：

rake aborted!
ActiveRecord::NoDatabaseError: FATAL:  database "scholarden_development" does not exist
/Users/saqibshahzad/.rvm/gems/ruby-2.6.3/gems/activerecord-5.2.4.1/lib/active_record/connection_adapters/postgresql_adapter.rb:696:in `rescue in connect'
/Users/saqibshahzad/.rvm/gems/ruby-2.6.3/gems/activerecord-5.2.4.1/lib/active_record/connection_adapters/postgresql_adapter.rb:691:in `connect'....
/Users/saqibshahzad/.rvm/gems/ruby-2.6.3/gems/rake-13.0.1/exe/rake:27:in `<top (required)>'
/Users/saqibshahzad/.rvm/gems/ruby-2.6.3/bin/ruby_executable_hooks:22:in `eval'
/Users/saqibshahzad/.rvm/gems/ruby-2.6.3/bin/ruby_executable_hooks:22:in `<main>'

Caused by:
PG::ConnectionBad: FATAL:  database "scholarden_development" does not exist
/Users/saqibshahzad/.rvm/gems/ruby-2.6.3/gems/pg-0.21.0/lib/pg.rb:56:in `initialize'
/Users/saqibshahzad/.rvm/gems/ruby-2.6.3/gems/pg-0.21.0/lib/pg.rb:56:in `new'
/Users/saqibshahzad/.rvm/gems/ruby-2.6.3/gems/pg-0.21.0/lib/pg.rb:56:in `connect'
/Users/saqibshahzad/.rvm/gems/ruby-2.6.3/gems/activerecord-5.2.4.1/lib/active_record/connection_adapters/postgresql_adapter.rb:692:in `connect'
......5.2.4.1/lib/rails/application.rb:520:in `block in run_tasks_blocks'
/Users/saqibshahzad/.rvm/gems/ruby-2.6.3/gems/rake-13.0.1/exe/rake:27:in `<top (required)>'
/Users/saqibshahzad/.rvm/gems/ruby-2.6.3/bin/ruby_executable_hooks:22:in `eval'
/Users/saqibshahzad/.rvm/gems/ruby-2.6.3/bin/ruby_executable_hooks:22:in `<main>'
Tasks: TOP => db:create => db:load_config => environment

我的database.yml:

default: &default
  adapter: postgresql
  encoding: unicode
  template: template0
  pool: <%= ENV.fetch("RAILS_MAX_THREADS")  5  %>


development:
  <<: *default
  database: scholarden_development
  host: localhost
  port: 5432
  username: rails_dev
  password: password
production:
  <<: *default
  database: scholarden_production
  host: localhost
  port: 5432

【问题讨论】：

你能发布你的 postgres 日志吗？您收到此错误的原因可能是缺少数据库角色，甚至可能是导轨预加载了您的代码并引发了此错误。更多信息here

运行createdb scholarden_development 时会发生什么？另外，你是安装了 OSX 的 Postgres 包，还是运行了brew install postgresql？

【参考方案1】：

您可以通过此命令创建数据库。

在您的终端中：createdb DB_NAME 在您的情况下它将是 createdb scholarden_development

【讨论】：

是的，我已经用同样的命令创建了它。不过谢谢