Ruby on rails 如何让PostgreSQL正常工作_Ruby On Rails_Postgresql_Heroku

Ruby on rails 如何让PostgreSQL正常工作

ruby-on-rails postgresql heroku

Ruby on rails 如何让PostgreSQL正常工作,ruby-on-rails,postgresql,heroku,Ruby On Rails,Postgresql,Heroku,我最近部署了一个heroku应用程序，它给了我一个错误，即sqlite3不受支持，因此我使用rails new-d postgresql project\u name命令创建了一个新项目。在我添加了一个scaffold:rails g scaffold Projects，然后进入routes.rb并添加了，：only[：index，：show]，然后运行服务器之前，一切都正常（它目前有一个稳定的版本，人们可以在web上访问）。在我加载主页之前一直有效，然后我得到了错误： PG::Connecti

我最近部署了一个heroku应用程序，它给了我一个错误，即sqlite3不受支持，因此我使用

rails new-d postgresql project\u name

命令创建了一个新项目。在我添加了一个scaffold:

rails g scaffold Projects

，然后进入routes.rb并添加了

，：only[：index，：show]

，然后运行服务器之前，一切都正常（它目前有一个稳定的版本，人们可以在web上访问）。在我加载主页之前一直有效，然后我得到了错误：

PG::ConnectionBad (could not connect to server: No such file or directory
    Is the server running locally and accepting
    connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
):

这里也有类似的问题，但它们通常在Heroku这边出错，而这只是在本地运行

是什么导致了这个错误

有趣的事实：

/var/run/postgresql/

不是我的目录

编辑： OS:Oracle虚拟机上的Ubuntu

完整控制台响应：

PG::ConnectionBad (could not connect to server: No such file or directory
    Is the server running locally and accepting
    connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
):

pg (1.0.0) lib/pg.rb:56:in `initialize'
pg (1.0.0) lib/pg.rb:56:in `new'
pg (1.0.0) lib/pg.rb:56:in `connect'
activerecord (5.1.6) lib/active_record/connection_adapters/postgresql_adapter.rb:697:in `connect'
activerecord (5.1.6) lib/active_record/connection_adapters/postgresql_adapter.rb:221:in `initialize'
activerecord (5.1.6) lib/active_record/connection_adapters/postgresql_adapter.rb:38:in `new'
activerecord (5.1.6) lib/active_record/connection_adapters/postgresql_adapter.rb:38:in `postgresql_connection'
activerecord (5.1.6) lib/active_record/connection_adapters/abstract/connection_pool.rb:759:in `new_connection'
activerecord (5.1.6) lib/active_record/connection_adapters/abstract/connection_pool.rb:803:in `checkout_new_connection'
activerecord (5.1.6) lib/active_record/connection_adapters/abstract/connection_pool.rb:782:in `try_to_checkout_new_connection'
activerecord (5.1.6) lib/active_record/connection_adapters/abstract/connection_pool.rb:743:in `acquire_connection'
activerecord (5.1.6) lib/active_record/connection_adapters/abstract/connection_pool.rb:500:in `checkout'
activerecord (5.1.6) lib/active_record/connection_adapters/abstract/connection_pool.rb:374:in `connection'
activerecord (5.1.6) lib/active_record/connection_adapters/abstract/connection_pool.rb:931:in `retrieve_connection'
activerecord (5.1.6) lib/active_record/connection_handling.rb:116:in `retrieve_connection'
activerecord (5.1.6) lib/active_record/connection_handling.rb:88:in `connection'
activerecord (5.1.6) lib/active_record/migration.rb:562:in `connection'
activerecord (5.1.6) lib/active_record/migration.rb:553:in `call'
actionpack (5.1.6) lib/action_dispatch/middleware/callbacks.rb:26:in `block in call'
activesupport (5.1.6) lib/active_support/callbacks.rb:97:in `run_callbacks'
actionpack (5.1.6) lib/action_dispatch/middleware/callbacks.rb:24:in `call'
actionpack (5.1.6) lib/action_dispatch/middleware/executor.rb:12:in `call'
actionpack (5.1.6) lib/action_dispatch/middleware/debug_exceptions.rb:59:in `call'
web-console (3.6.2) lib/web_console/middleware.rb:135:in `call_app'
web-console (3.6.2) lib/web_console/middleware.rb:30:in `block in call'
web-console (3.6.2) lib/web_console/middleware.rb:20:in `catch'
web-console (3.6.2) lib/web_console/middleware.rb:20:in `call'
actionpack (5.1.6) lib/action_dispatch/middleware/show_exceptions.rb:31:in `call'
railties (5.1.6) lib/rails/rack/logger.rb:36:in `call_app'
railties (5.1.6) lib/rails/rack/logger.rb:24:in `block in call'
activesupport (5.1.6) lib/active_support/tagged_logging.rb:69:in `block in tagged'
activesupport (5.1.6) lib/active_support/tagged_logging.rb:26:in `tagged'
activesupport (5.1.6) lib/active_support/tagged_logging.rb:69:in `tagged'
railties (5.1.6) lib/rails/rack/logger.rb:24:in `call'
sprockets-rails (3.2.1) lib/sprockets/rails/quiet_assets.rb:13:in `call'
actionpack (5.1.6) lib/action_dispatch/middleware/remote_ip.rb:79:in `call'
actionpack (5.1.6) lib/action_dispatch/middleware/request_id.rb:25:in `call'
rack (2.0.5) lib/rack/method_override.rb:22:in `call'
rack (2.0.5) lib/rack/runtime.rb:22:in `call'
activesupport (5.1.6) lib/active_support/cache/strategy/local_cache_middleware.rb:27:in `call'
actionpack (5.1.6) lib/action_dispatch/middleware/executor.rb:12:in `call'
actionpack (5.1.6) lib/action_dispatch/middleware/static.rb:125:in `call'
rack (2.0.5) lib/rack/sendfile.rb:111:in `call'
railties (5.1.6) lib/rails/engine.rb:522:in `call'
puma (3.11.4) lib/puma/configuration.rb:225:in `call'
puma (3.11.4) lib/puma/server.rb:632:in `handle_request'
puma (3.11.4) lib/puma/server.rb:446:in `process_client'
puma (3.11.4) lib/puma/server.rb:306:in `block in run'
puma (3.11.4) lib/puma/thread_pool.rb:120:in `block in spawn_thread'

database.yml：

# PostgreSQL. Versions 9.1 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'
#
default: &default
  adapter: postgresql
  encoding: unicode
  # For details on connection pooling, see Rails configuration guide
  # http://guides.rubyonrails.org/configuring.html#database-pooling
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>

development:
  <<: *default
  database: rileyshaw_development

  # The specified database role being used to connect to postgres.
  # To create additional roles in postgres see `$ createuser --help`.
  # When left blank, postgres will use the default role. This is
  # the same name as the operating system user that initialized the database.
  #username: rileyshaw

  # The password associated with the postgres role (username).
  #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:
  <<: *default
  database: rileyshaw_test

# As with config/secrets.yml, you never want to store sensitive information,
# like your database password, in your source code. If your source code is
# ever seen by anyone, they now have access to your database.
#
# Instead, provide the password as a unix environment variable when you boot
# the app. Read http://guides.rubyonrails.org/configuring.html#configuring-a-database
# for a full rundown on how to provide these environment variables in a
# production deployment.
#
# On Heroku and other platform providers, you may have a full connection URL
# available as an environment variable. For example:
#
#   DATABASE_URL="postgres://myuser:mypass@localhost/somedatabase"
#
# You can use this database configuration with:
#
#   production:
#     url: <%= ENV['DATABASE_URL'] %>
#
production:
  <<: *default
  database: rileyshaw_production
  username: rileyshaw
  password: <%= ENV['RILEYSHAW_DATABASE_PASSWORD'] %>

#PostgreSQL。支持9.1及以上版本。
#
#安装pg驱动程序：
#gem安装页面
#在使用自制软件的OS X上：
#gem安装pg----使用pg config=/usr/local/bin/pg_config
#在带有MacPorts的OS X上：
#gem安装pg--with pg config=/opt/local/lib/postgresql84/bin/pg_-config
#在Windows上：
#gem安装页面
#选择win32版本。
#安装PostgreSQL并将其/bin目录放在您的路径上。
#
#使用Gemfile配置
#宝石“pg”
#
默认值：&默认值
适配器：postgresql
编码：unicode
#有关连接池的详细信息，请参阅Rails配置指南
# http://guides.rubyonrails.org/configuring.html#database-汇集
游泳池：
发展：
看来你没有安装postgres，也没有添加合适的用户。
应该是您的答案：）
将此添加到您的文件中
group: production do 
    gem "pg"
end


group: development do
    gem "sqlite3"
end

然后bundle安装

gem“Pg”用于生产目的，而gem“sqlite3”仍然可以在本地使用，但我强烈建议您安装Postgres并在系统上运行，以避免将来崩溃。但是如果您正在进行快速原型设计，那么请继续
您使用的是什么操作系统？数据库服务器日志说什么？还有哪些打印到控制台的内容没有包括在这里？你的database.yml是如何配置的？@MarsAtomic我还没有触及.yml，所以这应该是默认值，但我会更新这个问题，以包含你所问的问题。你是否在本地安装了postgres？rails gem仅将其配置为与您的应用程序一起运行。您仍然需要单独安装postgres并添加一个用户。@bkunzi01我不这么认为，我只是遵循heroku的教程，该教程只让我安装了gem。我试试看that@bkunzi01下载了，但现在我收到了，原因是：PG:：ConnectionBad:FATAL:role“riley”不存在
，这似乎是另一个问题。谢谢你的帮助