rails server的問題

我剛剛開始使用rails和heroku上的ruby。我正在關注herokus網站上的入門指南，但遇到了問題。我已經登錄到heroku，創建了一個應用程序，如rails new myapp --database=postgresql，然後在app/views/welcome/index.html.erb中創建了一個控制器rails generate controller welcome index，我剛剛創建了一個名爲hello world的標題。當我啓動一個本地服務器並轉到它，我得到could not connect to server: No such file or directory Is the server running locally and accepting connections on Unix domain socket "/tmp/.s.PGSQL.5432"?和輸出在下面列出的終端，我跟着另一個教程只是爲了設置軌道沒有heroku，並創建了這樣的應用程序rails new blog，然後做同樣的創建一個控制器在heroku教程和一切正常，所以我認爲這個問題是rails new myapp --database=postgresql我該如何解決這個問題？rails server的問題

PG::ConnectionBad (could not connect to server: No such file or directory 
    Is the server running locally and accepting 
    connections on Unix domain socket "/tmp/.s.PGSQL.5432"? 
): 
    activerecord (4.0.2) lib/active_record/connection_adapters/postgresql_adapter.rb:831:in `initialize' 
    activerecord (4.0.2) lib/active_record/connection_adapters/postgresql_adapter.rb:831:in `new' 
    activerecord (4.0.2) lib/active_record/connection_adapters/postgresql_adapter.rb:831:in `connect' 
    activerecord (4.0.2) lib/active_record/connection_adapters/postgresql_adapter.rb:548:in `initialize' 
    activerecord (4.0.2) lib/active_record/connection_adapters/postgresql_adapter.rb:41:in `new' 
    activerecord (4.0.2) lib/active_record/connection_adapters/postgresql_adapter.rb:41:in `postgresql_connection' 
    activerecord (4.0.2) lib/active_record/connection_adapters/abstract/connection_pool.rb:440:in `new_connection' 
    activerecord (4.0.2) lib/active_record/connection_adapters/abstract/connection_pool.rb:450:in `checkout_new_connection' 
    activerecord (4.0.2) lib/active_record/connection_adapters/abstract/connection_pool.rb:421:in `acquire_connection' 
    activerecord (4.0.2) lib/active_record/connection_adapters/abstract/connection_pool.rb:356:in `block in checkout' 
    /Users/mattmoss/.rbenv/versions/2.1.0/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize' 
    activerecord (4.0.2) lib/active_record/connection_adapters/abstract/connection_pool.rb:355:in `checkout' 
    activerecord (4.0.2) lib/active_record/connection_adapters/abstract/connection_pool.rb:265:in `block in connection' 
    /Users/mattmoss/.rbenv/versions/2.1.0/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize' 
    activerecord (4.0.2) lib/active_record/connection_adapters/abstract/connection_pool.rb:264:in `connection' 
    activerecord (4.0.2) lib/active_record/connection_adapters/abstract/connection_pool.rb:546:in `retrieve_connection' 
    activerecord (4.0.2) lib/active_record/connection_handling.rb:79:in `retrieve_connection' 
    activerecord (4.0.2) lib/active_record/connection_handling.rb:53:in `connection' 
    activerecord (4.0.2) lib/active_record/query_cache.rb:51:in `restore_query_cache_settings' 
    activerecord (4.0.2) lib/active_record/query_cache.rb:43:in `rescue in call' 
    activerecord (4.0.2) lib/active_record/query_cache.rb:32:in `call' 
    activerecord (4.0.2) lib/active_record/connection_adapters/abstract/connection_pool.rb:626:in `call' 
    activerecord (4.0.2) lib/active_record/migration.rb:369:in `call' 
    actionpack (4.0.2) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call' 
    activesupport (4.0.2) lib/active_support/callbacks.rb:373:in `_run__4242016335734095215__call__callbacks' 
    activesupport (4.0.2) lib/active_support/callbacks.rb:80:in `run_callbacks' 
    actionpack (4.0.2) lib/action_dispatch/middleware/callbacks.rb:27:in `call' 
    actionpack (4.0.2) lib/action_dispatch/middleware/reloader.rb:64:in `call' 
    actionpack (4.0.2) lib/action_dispatch/middleware/remote_ip.rb:76:in `call' 
    actionpack (4.0.2) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call' 
    actionpack (4.0.2) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call' 
    railties (4.0.2) lib/rails/rack/logger.rb:38:in `call_app' 
    railties (4.0.2) lib/rails/rack/logger.rb:20:in `block in call' 
    activesupport (4.0.2) lib/active_support/tagged_logging.rb:67:in `block in tagged' 
    activesupport (4.0.2) lib/active_support/tagged_logging.rb:25:in `tagged' 
    activesupport (4.0.2) lib/active_support/tagged_logging.rb:67:in `tagged' 
    railties (4.0.2) lib/rails/rack/logger.rb:20:in `call' 
    actionpack (4.0.2) lib/action_dispatch/middleware/request_id.rb:21:in `call' 
    rack (1.5.2) lib/rack/methodoverride.rb:21:in `call' 
    rack (1.5.2) lib/rack/runtime.rb:17:in `call' 
    activesupport (4.0.2) lib/active_support/cache/strategy/local_cache.rb:83:in `call' 
    rack (1.5.2) lib/rack/lock.rb:17:in `call' 
    actionpack (4.0.2) lib/action_dispatch/middleware/static.rb:64:in `call' 
    rack (1.5.2) lib/rack/sendfile.rb:112:in `call' 
    railties (4.0.2) lib/rails/engine.rb:511:in `call' 
    railties (4.0.2) lib/rails/application.rb:97:in `call' 
    rack (1.5.2) lib/rack/lock.rb:17:in `call' 
    rack (1.5.2) lib/rack/content_length.rb:14:in `call' 
    rack (1.5.2) lib/rack/handler/webrick.rb:60:in `service' 
    /Users/mattmoss/.rbenv/versions/2.1.0/lib/ruby/2.1.0/webrick/httpserver.rb:138:in `service' 
    /Users/mattmoss/.rbenv/versions/2.1.0/lib/ruby/2.1.0/webrick/httpserver.rb:94:in `run' 
    /Users/mattmoss/.rbenv/versions/2.1.0/lib/ruby/2.1.0/webrick/server.rb:295:in `block in start_thread' 


    Rendered /Users/mattmoss/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/middleware/templates/rescues/_source.erb (0.5ms) 
    Rendered /Users/mattmoss/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/middleware/templates/rescues/_trace.erb (1.0ms) 
    Rendered /Users/mattmoss/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (1.0ms) 
    Rendered /Users/mattmoss/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (18.2ms)

這裏是我的database.yml

# PostgreSQL. Versions 8.2 and up are supported. 
# 
# Install the pg driver: 
# gem install pg 
# On OS X with Homebrew: 
# gem install pg -- --with-pg-config=/usr/local/bin/pg_config 
# On OS X with MacPorts: 
# gem install pg -- --with-pg-config=/opt/local/lib/postgresql84/bin/pg_config 
# On Windows: 
# gem install pg 
#  Choose the win32 build. 
#  Install PostgreSQL and put its /bin directory on your path. 
# 
# Configure Using Gemfile 
# gem 'pg' 
# 
development: 
    adapter: postgresql 
    encoding: unicode 
    database: myapp_development 
    pool: 5 
    password: 

    # Connect on a TCP socket. Omitted by default since the client uses a 
    # domain socket that doesn't need configuration. Windows does not have 
    # domain sockets, so uncomment these lines. 
    #host: localhost 

    # The TCP port the server listens on. Defaults to 5432. 
    # If your server runs on a different port number, change accordingly. 
    #port: 5432 

    # Schema search path. The server defaults to $user,public 
    #schema_search_path: myapp,sharedapp,public 

    # Minimum log levels, in increasing order: 
    # debug5, debug4, debug3, debug2, debug1, 
    # log, notice, warning, error, fatal, and panic 
    # Defaults to warning. 
    #min_messages: notice 

# Warning: The database defined as "test" will be erased and 
# re-generated from your development database when you run "rake". 
# Do not set this db to the same as development or production. 
test: 
    adapter: postgresql 
    encoding: unicode 
    database: myapp_test 
    pool: 5 
    password: 

production: 
    adapter: postgresql 
    encoding: unicode 
    database: myapp_production 
    pool: 5 
    password: 

development: 
    host: localhost 

test: 
    host: localhost

來源

2014-02-10 matthew

從這裏開始..並確保你有本地運行的Postgres，http://stackoverflow.com/questions/7975556/how-to-start-postgresql-server-on-mac-os-x – blotto

「no such file或目錄「通常表示套接字問題。 –

我該如何解決這個問題（我昨天開始學習）@PeterWooster – matthew

在你config/database.yml，嘗試添加

host: localhost

在每個開發和測試環境或

更具體看着所示現有config/database.yml以上：

development: 
    adapter: postgresql 
    encoding: unicode 
    database: myapp_development 
    pool: 5 
    password: 
    host: localhost 

test: 
    adapter: postgresql 
    encoding: unicode 
    database: myapp_test 
    pool: 5 
    password: 
    host: localhost

希望這會有所幫助

來源

2014-02-10 23:53:08 user2262149

添加後，它說'數據庫配置沒有指定適配器，當我去http：// localhost：3000/ – matthew

你可以添加你原來的'config/database.yml'文件到你的問題？ – user2262149

好吧我在 – matthew

在大多數* nix服務器上，「localhost」是通過Unix風格套接字處理的。如果您使用127.0.0.1，它將使用TCP/IP。嘗試一下，或者確保你的客戶端和服務器使用相同的套接字地址，並且它實際上是一個可用的* nix套接字。

database.yml中有一個配置參數，可以讓你設置套接字地址，確保你也可以訪問目錄。

來源

2014-02-11 00:07:59

我聽說Heroku對db連接行爲做了一些修改。對於rails版本> = 4.1，它不覆蓋你的config/database.yml - 它與它合併。首先你需要訪問https://postgres.heroku.com/databases並點擊你的數據庫。你應該看看該參數在PIC下面

使用該變量爲您的生產參數，像這樣

production: 
    adapter: postgresql 
    url: <%= ENV['HEROKU_POSTGRESQL_BLACK_URL'] %>

這是我嘗試不同的事情後，什麼工作。我希望這可以幫助別人。

來源

2014-11-26 00:01:18 ajthewebdev

rails server的問題

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