ruby-on-rails - Postgresql 适配器 (pg) : could not connect to server

Question

我每次运行 Rails 应用程序时都会收到此错误(它无法连接到我的本地 Postgresql)

/Users/leonardo/.rvm/gems/ruby-1.9.3-p362/gems/activerecord-3.2.11/lib/
active_record/connection_adapters/postgresql_adapter.rb:1208:in `initialize': 
could not connect to server: No such file or directory (PG::Error)
   Is the server running locally and accepting
connections on Unix domain socket "/var/pgsql_socket/.s.PGSQL.5432"?

我正在使用 Postgres.app它正在正确运行。

如果我跑

$ psql

我可以正常登录到 Postgresql 控制台。

$ which psql
 /Applications/Postgres.app/Contents/MacOS/bin/psql

gem 文件

source 'https://rubygems.org'
ruby "1.9.3"

gem 'rails', '3.2.11'
gem "pg"

数据库.yml

development:
  adapter: postgresql
  encoding: unicode
  username: leonardo
  password: 
  database: zapping
  port: 5432  

Postgresql(控制台)

$ psql
leonardo=# \l

Answer 1

尝试将 host: localhost 添加到您的 database.yml。 (基于:https://stackoverflow.com/a/10793186/919641)