ruby&postgres Ruby macOS 环境下连接数据库报错

Question

这是我的database.rb

#!/usr/bin/ruby
require 'postgres'

conn = PGconn.connect("localhost", 5432, '', '', "postgres", "postgres", "postgre")

res  = conn.exec('select tablename, tableowner from pg_tables')

res.each do |row|
    row.each do |column|
        print column
        (20-column.length).times{print " "}
    end
    puts
end

可执行文件： ruby database.rb

Traceback (most recent call last):
  11: from database.rb:4:in `<main>'
  10: from database.rb:4:in `new'
   9: from /Library/Ruby/Gems/2.6.0/gems/postgres-pr-0.7.0/lib/postgres-pr/postgres-compat.rb:28:in `initialize'
   8: from /Library/Ruby/Gems/2.6.0/gems/postgres-pr-0.7.0/lib/postgres-pr/postgres-compat.rb:28:in `new'
   7: from /Library/Ruby/Gems/2.6.0/gems/postgres-pr-0.7.0/lib/postgres-pr/connection.rb:58:in `initialize'
   6: from /Library/Ruby/Gems/2.6.0/gems/postgres-pr-0.7.0/lib/postgres-pr/connection.rb:58:in `loop'
   5: from /Library/Ruby/Gems/2.6.0/gems/postgres-pr-0.7.0/lib/postgres-pr/connection.rb:59:in `block in initialize'
   4: from /Library/Ruby/Gems/2.6.0/gems/postgres-pr-0.7.0/lib/postgres-pr/message.rb:58:in `read'
   3: from /Library/Ruby/Gems/2.6.0/gems/postgres-pr-0.7.0/lib/postgres-pr/message.rb:116:in `create'
   2: from /Library/Ruby/Gems/2.6.0/gems/postgres-pr-0.7.0/lib/postgres-pr/message.rb:137:in `parse'
   1: from /Library/Ruby/Gems/2.6.0/gems/postgres-pr-0.7.0/lib/postgres-pr/message.rb:82:in `parse'
/Library/Ruby/Gems/2.6.0/gems/postgres-pr-0.7.0/lib/postgres-pr/message.rb:139:in `block in parse': undefined method `auth_type' for #<PostgresPR::UnknownAuthType:0x0000000133830f98> (NoMethodError)

接下来要做什么？

Answer 1

我认为 PGconn 不支持 ''（空字符串）作为选项和 tty 值。

您是否尝试过将它们设置为 nil：

PGconn.connect("localhost", 5432, nil, nil, "postgres", "postgres", "postgre")

ruby&postgres Ruby macOS 环境下连接数据库报错

ruby&postgres Ruby connects to database error in macOS environment

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