将Postgresql数据库与Ruby应用程序集成

hlswsv35 于 2022-12-26 发布在 PostgreSQL

关注(0)|答案(3)|浏览(111)

我刚刚开始构建我的第一个Ruby on Rails应用程序，为了让它托管在heroku上，我更改了应用程序中的数据库设置。我通过更改应用程序中的database.yml文件来做到这一点。这就是我现在在应用程序中拥有的内容。

# SQLite version 3.x
#   gem install sqlite3-ruby (not necessary on OS X Leopard)
development:
  adapter:postgresql
  encoding:unicode
  database:dezirus_dev
  pool:5
  host:localhost
  username:postgres
  password:
  port:5432
 # timeout: 5000

# 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:dezirus_test
  pool:5
  username:postgres
  password:
  host:localhost
  port:5432

production:
  adapter:postgresql
  encoding:unicode
  database:dezirus
  pool:5
  username:postgres
  password:
  host:localhost
  port:5432

当我试图耙的数据库，这是我得到的错误。

RAHMAN@IMLDEV1-LT ~/rails-projects/dezirus
$ rake db:migrate --trace
rake aborted!
no such file to load -- pg
/usr/lib/ruby/gems/1.8/gems/bundler-1.0.22/lib/bundler/runtime.rb:68:in `require'
/usr/lib/ruby/gems/1.8/gems/bundler-1.0.22/lib/bundler/runtime.rb:68:in `require'
/usr/lib/ruby/gems/1.8/gems/bundler-1.0.22/lib/bundler/runtime.rb:66:in `each'
/usr/lib/ruby/gems/1.8/gems/bundler-1.0.22/lib/bundler/runtime.rb:66:in `require'
/usr/lib/ruby/gems/1.8/gems/bundler-1.0.22/lib/bundler/runtime.rb:55:in `each'
/usr/lib/ruby/gems/1.8/gems/bundler-1.0.22/lib/bundler/runtime.rb:55:in `require'
/usr/lib/ruby/gems/1.8/gems/bundler-1.0.22/lib/bundler.rb:122:in `require'
/home/RAHMAN/rails-projects/dezirus/config/application.rb:7
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `require'
/home/RAHMAN/rails-projects/dezirus/Rakefile:4
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/rake_module.rb:25:in `load'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/rake_module.rb:25:in `load_rakefile'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:501:in `raw_load_rakefile'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:82:in `load_rakefile'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:81:in `load_rakefile'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:65:in `run'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/bin/rake:33
/usr/bin/rake:23:in `load'
/usr/bin/rake:23

请注意，数据库是预先建立使用PostgreSQL和我已经有我的表，主键和外键集。我不知道是否可能这就是为什么它拒绝工作或没有。任何帮助将不胜感激。谢谢

postgresql

来源：https://stackoverflow.com/questions/11660478/integrate-postgresql-database-with-ruby-application

3条答案

按热度按时间

voase2hg1#

首先在计算机http://www.postgresql.org/download/中安装PG
尝试使用PGAdmin3（它附带的数据库管理员）打开它，并创建一个新的BD
接下来在你的gem文件中添加

gem 'pg'

在终端运行捆绑安装。
这里我给你一个DB.yml的例子

development:
  adapter: postgresql
  encoding: unicode
  database: billy
  pool: 5
  username: postgres
  password:

您可能需要在本地主机中配置pg_hba.conf，使其无需密码即可登录。

赞(0）回复(0）举报 2022-12-26

z9ju0rcb2#

将gem 'pg'添加到gem文件并运行

bundle install

然后转到http://www.postgresql.org/download/并将数据库安装到您的计算机上，以便在本地运行您的应用程序。

赞(0）回复(0）举报 2022-12-26

noj0wjuj3#

嘿伙计们我终于找到了一个解决不同问题的方法。原来cygwin pg gem不支持我的PostgreSQL版本，我用了ruby安装程序，它安装毫不退缩。然后我用不得不添加这行代码到 Boot .rb文件

require 'yaml'
YAML::ENGINE.yamler = 'syck'

YML文件也需要看起来像这样。

development:
  adapter: postgresql
  encoding: unicode
  database: dezirus_dev
  pool: 5
  username: postgres
  password:
# 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: dezirus_test
  username: postgres
  password:
production:
  adapter: postgresql
  encoding: unicode
  database: dezirus
  username: sudo
  password: *******

然后我运行rake db：migrate命令，瞧：）

赞(0）回复(0）举报 2022-12-26

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将Postgresql数据库与Ruby应用程序集成

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