如何使用url连接到postgresql

我曾问一个较早的问题,其并未得到任何回复.

基本上我invalid database url在尝试时会出错heroku db:push.

我想我可以尝试显式提供数据库URL.

我试过了:

heroku db:push postgres://postgres@localhost/myrailsdb

但这给了错误:

Failed to connect to database:
  Sequel::DatabaseConnectionError -> PGError fe_sendauth: no password supplied

提供用户名和密码的格式是什么？

试试heroku db:push postgres://username:password@localhost/myrailsdb.

以下是如何在Ruby脚本中执行此操作:

# Connect to database.
uri = URI.parse(ENV['DATABASE_URL'])
postgres = PG.connect(uri.hostname, uri.port, nil, nil, uri.path[1..-1], uri.user, uri.password)

# List all tables.
tables = postgres.exec('SELECT * FROM pg_catalog.pg_tables')
tables.num_tuples.times do |i|
  p tables[i]
end

编辑postgresql配置(pg_hba.conf)文件并将"host"类型方法更改为"trust".但请注意,这不安全.

# TYPE  DATABASE        USER            ADDRESS                 METHOD

# "local" is for Unix domain socket connections only
local   all             all                                     trust
# IPv4 local connections:
host    all             all             127.0.0.1/32            trust
# IPv6 local connections:
host    all             all             ::1/128                 md5

重新启动postgresql服务器并重新运行该命令

$ heroku db:push postgres://postgres@localhost/myrailsdb

以下是我的回答:https://stackoverflow.com/a/7667344/181677