无法使用 Ruby 连接到 Heroku 上的 PostgreSQL 数据库 - 无法翻译主机名 [英] Can't connect to PostgreSQL database on Heroku using Ruby - could not translate host name
问题描述
我使用 Ruby(不是 Rails)并连接 PostgreSQL 数据库.我一直在尝试在 Heroku 上进行设置,但是在启动应用程序时遇到了问题.在本地运行应用程序可以正常工作.
我的本地 .env 看起来像:
postgres://DATABASE_URL=localhost
和 Ruby connect 连接到数据库看起来像:
@@db = PGconn.open(:hostaddr => ENV['DATABASE_URL'], :dbname => '(dbname)', :password => '(password)')
当我推送到 Heroku 时,应用程序在该行崩溃,并将此错误写入日志:
无法将主机名postgres://(my heroku db address)"转换为地址:名称或服务未知(PG::Error)
那里的数据库地址与我的 heroku:config
中的 DATABASE_URL
匹配.我使用的是共享数据库.
我尝试使用 :host =>ENV['DATABASE_URL']
(与 :hostaddr
相反)但结果相同.我猜我遗漏了一些简单的东西,但我没有任何好的想法.
您需要解析出DATABASE_URL
的特定部分.请参阅 https://devcenter.heroku.com/articles/rack#database_access>
I'm using Ruby (not Rails) and connecting a PostgreSQL database. I've been trying to get set up on Heroku, but I'm having problems starting the application. Running the application locally works fine.
My local .env looks like:
postgres://DATABASE_URL=localhost
And the Ruby connect to connect to the database looks like:
@@db = PGconn.open(:hostaddr => ENV['DATABASE_URL'], :dbname => '(dbname)', :password => '(password)')
When I push to Heroku the app crashes on that line, and writes this error to the logs:
could not translate host name "postgres://(my heroku db address)" to address: Name or service not known (PG::Error)
The database address there matches the DATABASE_URL
in my heroku:config
. I'm using a shared database.
I tried using :host => ENV['DATABASE_URL']
(as opposed to :hostaddr
) but had the same result. I'm guessing there's something simple I'm missing but I haven't had any good ideas.
You need to parse out the specific parts of the DATABASE_URL
. Please see https://devcenter.heroku.com/articles/rack#database_access
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