Ruby on rails RubyonRails：如何为postgresql编辑database.yml？

Rails新应用程序

当前的database.yml如下所示：

# SQLite version 3.x
#   gem install sqlite3
#
#   Ensure the SQLite 3 gem is defined in your Gemfile
#   gem 'sqlite3'
development:
  adapter: sqlite3
  database: db/development.sqlite3
  pool: 5
  timeout: 5000

# 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:
  adapter: sqlite3
  database: db/test.sqlite3
  pool: 5
  timeout: 5000

production:
  adapter: sqlite3
  database: db/production.sqlite3
  pool: 5
  timeout: 5000

我需要为postgresql数据库编辑这个

我该怎么做？

简单地说：

development:
  adapter: postgresql
  encoding: unicode
  database: blog_development
  pool: 5
  username: blog
  password:
  host: localhost

来源：

正如扎巴所说

development:
  adapter: postgresql
  encoding: unicode
  database: blog_development
  pool: 5
  username: blog
  password:

正如报告中提到的。但是，您可能需要另外一条

min\u消息：WARNING

，以便删除。因此，我的

database.yml

条目如下所示

development:
  adapter: postgresql
  encoding: unicode
  database: blog_development
  pool: 5
  username: blog
  password:
  min_messages: WARNING

---

您可能对使用postgres默认值生成新应用程序感兴趣：

rails new myapp --database=postgresql

正如这里提到的：

只需使用

rails new app_name --database=postgresql

或者如果现有应用程序尝试

 development:
  adapter: postgresql
  encoding: unicode
  database: app_dev
  pool: 5
  username: username
  password: password
  host: localhost

---

另一种方法是在&default中使用公共值，然后在其他环境中使用单独的值，这些值可以基于环境变量：

default: &default
  adapter:  postgresql
  encoding: unicode
  port:     <%= ENV.fetch("POSTGRESQL_PORT", "5432") %>
  pool:     <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
  username: <%= ENV['POSTGRESQL_USER_NAME'] %>
  password: <%= ENV.fetch("POSTGRESQL_PASSWORD", "myS3cr3tP4ssw0rd") %>
  host:     <%= ENV['POSTGRESQL_HOST'] %>

development:
  <<: *default
  database: <%= ENV['POSTGRESQL_DB'] %>-development
  host: db

test:
  <<: *default
  database: <%= ENV['POSTGRESQL_DB'] %>-test
  host: db

production:
  <<: *default
  database: <%= ENV['POSTGRESQL_DB'] %>

default:&default
适配器：postgresql
编码：unicode
端口：
游泳池：
用户名：
密码：
主持人:
发展：
 development:
  adapter: postgresql
  encoding: unicode
  database: app_dev
  pool: 5
  username: username
  password: password
  host: localhost

default: &default
  adapter:  postgresql
  encoding: unicode
  port:     <%= ENV.fetch("POSTGRESQL_PORT", "5432") %>
  pool:     <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
  username: <%= ENV['POSTGRESQL_USER_NAME'] %>
  password: <%= ENV.fetch("POSTGRESQL_PASSWORD", "myS3cr3tP4ssw0rd") %>
  host:     <%= ENV['POSTGRESQL_HOST'] %>

development:
  <<: *default
  database: <%= ENV['POSTGRESQL_DB'] %>-development
  host: db

test:
  <<: *default
  database: <%= ENV['POSTGRESQL_DB'] %>-test
  host: db

production:
  <<: *default
  database: <%= ENV['POSTGRESQL_DB'] %>