Rails本地服务器不运行：无法连接到服务器：连接被拒绝

我的本地服务器不再适用于我的Rails应用程序。我收到以下错误消息：Rails本地服务器不运行：无法连接到服务器：连接被拒绝

could not connect to server: Connection refused 
    Is the server running on host "localhost" (127.0.0.1) and accepting 
    TCP/IP connections on port 5432? 
could not connect to server: Connection refused 
    Is the server running on host "localhost" (::1) and accepting 
    TCP/IP connections on port 5432?

我去检查我的数据库日志。这些都是过去的几行：

STATEMENT: CREATE DATABASE starsetmetiers_development; 
ERROR: unrecognized configuration parameter "idle_in_transaction_session_timeout" 
STATEMENT: SET idle_in_transaction_session_timeout = 0; 

ERROR: unrecognized configuration parameter "row_security" 
STATEMENT: SET row_security = off; 

FATAL: database "stars_metiers_development" does not exist 
FATAL: database "stars_metiers_development" does not exist 
LOG: received smart shutdown request 
LOG: autovacuum launcher shutting down 
LOG: shutting down 
LOG: database system is shut down

我最近摧毁了我的开发数据库，并通过拉动生产一个重建一个。我认为这是我的database.yml文件正确引用：

default: &default 
    adapter: postgresql 
    encoding: unicode 
    host: localhost 
    # For details on connection pooling, see rails configuration guide 
    # http://guides.rubyonrails.org/configuring.html#database-pooling 
    pool: 5 

development: 
    <<: *default 
    database: starsetmetiers_development

我不明白的地方这个错误来自（我没有找到我的Postgres的文件夹也postmaster.pid文件）。我该如何解决这个问题？

我收到此错误信息，当我尝试运行rails c

/Users/davidgeismar/.rbenv/versions/2.0.0-p576/lib/ruby/2.0.0/irb/completion.rb:9:in `require': dlopen(/Users/davidgeismar/.rbenv/versions/2.0.0-p576/lib/ruby/2.0.0/x86_64-darwin14.5.0/readline.bundle, 9): Library not loaded: /usr/local/opt/readline/lib/libreadline.6.dylib (LoadError) 
    Referenced from: /Users/davidgeismar/.rbenv/versions/2.0.0-p576/lib/ruby/2.0.0/x86_64-darwin14.5.0/readline.bundle 
    Reason: image not found - /Users/davidgeismar/.rbenv/versions/2.0.0-p576/lib/ruby/2.0.0/x86_64-darwin14.5.0/readline.bundle 
    from /Users/davidgeismar/.rbenv/versions/2.0.0-p576/lib/ruby/2.0.0/irb/completion.rb:9:in `<top (required)>' 
    from /Users/davidgeismar/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/railties-4.1.8/lib/rails/commands/console.rb:3:in `require' 
    from /Users/davidgeismar/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/railties-4.1.8/lib/rails/commands/console.rb:3:in `<top (required)>' 
    from /Users/davidgeismar/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/railties-4.1.8/lib/rails/commands/commands_tasks.rb:128:in `require' 
    from /Users/davidgeismar/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/railties-4.1.8/lib/rails/commands/commands_tasks.rb:128:in `require_command!' 
    from /Users/davidgeismar/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/railties-4.1.8/lib/rails/commands/commands_tasks.rb:59:in `console' 
    from /Users/davidgeismar/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/railties-4.1.8/lib/rails/commands/commands_tasks.rb:40:in `run_command!' 
    from /Users/davidgeismar/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/railties-4.1.8/lib/rails/commands.rb:17:in `<top (required)>' 
    from ./bin/rails:4:in `require' 
    from ./bin/rails:4:in `<main>'

来源

2016-11-18 David Geismar

它看起来就像您的posgres服务器要么不在本地主机上一样，要么根本没有运行。 –

@SergioTulentsev你有什么建议我应该做/检查？ –

你错过readline的依赖，因为这条线在错误输出显示：

Library not loaded: /usr/local/opt/readline/lib/libreadline

可以解决这个问题与

$ brew install readline

来源

2016-11-18 20:33:48 steel

参数idle_in_transaction_session_timeout是9中新增的.6 - 我认为你正试图将9.6备份上传到早期版本的Postgres。

我注意到转储的顶部如下，并得到它的工作时，我有一个问题。当你有机会时你可能想更新Postgres。

SET statement_timeout = 0; 
SET lock_timeout = 0; 
-- SET idle_in_transaction_session_timeout = 0; 
SET client_encoding = 'UTF8'; 
SET standard_conforming_strings = on; 
SET check_function_bodies = false; 
SET client_min_messages = warning; 
-- SET row_security = off;

来源

2016-11-22 17:33:24 Ghoti

无法连接到服务器：连接被拒绝是运行在主机上的服务器的“本地主机”（127.0.0.1）和接收端口5432 TCP/IP连接？

上述错误的原因是您的postgresql服务器未运行。所以，请运行按您的操作系统如下：

Ubuntu的：须藤服务的PostgreSQL启动
的Fedora：systemctl启动PostgreSQL的
的Windows：NET START PostgreSQL相关9.xx

来源

2016-11-22 17:50:18

Rails本地服务器不运行：无法连接到服务器：连接被拒绝

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