本文介绍了Gem :: LoadError：为数据库适配器指定了“postgresql”，但是未加载gem的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
帮助我！输入mina deploy获取这个美丽：
Help me! Enter "mina deploy" get this beauty:
我的/home/deploy/inscope/shared/config/database.yml看起来：
My "/home/deploy/inscope/shared/config/database.yml" looks:
production:
adapter: postgresql
encoding: unicode
database: ***
username: ***
password: ***
host: localhost
rake aborted!
Gem::LoadError: Specified 'postgresql' for database adapter, but the gem is not loaded. Add `gem 'pg'` to your Gemfile (and ensure its version is at the minimum required by ActiveRecord).
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.0/lib/active_record/connection_adapters/connection_specification.rb:190:in `rescue in spec'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.0/lib/active_record/connection_adapters/connection_specification.rb:187:in `spec'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.0/lib/active_record/connection_handling.rb:50:in `establish_connection'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.0/lib/active_record/railtie.rb:129:in `block (2 levels) in <class:Railtie>'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.0/lib/active_support/lazy_load_hooks.rb:38:in `instance_eval'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.0/lib/active_support/lazy_load_hooks.rb:38:in `execute_hook'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.0/lib/active_support/lazy_load_hooks.rb:28:in `block in on_load'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.0/lib/active_support/lazy_load_hooks.rb:27:in `each'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.0/lib/active_support/lazy_load_hooks.rb:27:in `on_load'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.0/lib/active_record/railtie.rb:118:in `block in <class:Railtie>'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/railties-4.1.0/lib/rails/initializable.rb:30:in `instance_exec'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/railties-4.1.0/lib/rails/initializable.rb:30:in `run'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/railties-4.1.0/lib/rails/initializable.rb:55:in `block in run_initializers'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/railties-4.1.0/lib/rails/initializable.rb:54:in `run_initializers'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/railties-4.1.0/lib/rails/application.rb:288:in `initialize!'
/home/deploy/inscope/tmp/build-142737137923106/config/environment.rb:5:in `<top (required)>'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:247:in `require'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:247:in `block in require'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:232:in `load_dependency'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:247:in `require'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/railties-4.1.0/lib/rails/application.rb:264:in `require_environment!'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/railties-4.1.0/lib/rails/application.rb:367:in `block in run_tasks_blocks'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/sprockets-rails-2.2.4/lib/sprockets/rails/task.rb:64:in `block (2 levels) in define'
Gem::LoadError: pg is not part of the bundle. Add it to Gemfile.
/home/deploy/.rvm/gems/ruby-2.2.0/gems/bundler-1.9.1/lib/bundler/rubygems_integration.rb:261:in `block in replace_gem'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.0/lib/active_record/connection_adapters/postgresql_adapter.rb:13:in `<top (required)>'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:247:in `require'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:247:in `block in require'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:232:in `load_dependency'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:247:in `require'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.0/lib/active_record/connection_adapters/connection_specification.rb:188:in `spec'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.0/lib/active_record/connection_handling.rb:50:in `establish_connection'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.0/lib/active_record/railtie.rb:129:in `block (2 levels) in <class:Railtie>'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.0/lib/active_support/lazy_load_hooks.rb:38:in `instance_eval'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.0/lib/active_support/lazy_load_hooks.rb:38:in `execute_hook'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.0/lib/active_support/lazy_load_hooks.rb:28:in `block in on_load'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.0/lib/active_support/lazy_load_hooks.rb:27:in `each'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.0/lib/active_support/lazy_load_hooks.rb:27:in `on_load'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.0/lib/active_record/railtie.rb:118:in `block in <class:Railtie>'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/railties-4.1.0/lib/rails/initializable.rb:30:in `instance_exec'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/railties-4.1.0/lib/rails/initializable.rb:30:in `run'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/railties-4.1.0/lib/rails/initializable.rb:55:in `block in run_initializers'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/railties-4.1.0/lib/rails/initializable.rb:54:in `run_initializers'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/railties-4.1.0/lib/rails/application.rb:288:in `initialize!'
/home/deploy/inscope/tmp/build-142737137923106/config/environment.rb:5:in `<top (required)>'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:247:in `require'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:247:in `block in require'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:232:in `load_dependency'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:247:in `require'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/railties-4.1.0/lib/rails/application.rb:264:in `require_environment!'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/railties-4.1.0/lib/rails/application.rb:367:in `block in run_tasks_blocks'
/home/deploy/inscope/tmp/build-142737137923106/vendor/bundle/ruby/2.2.0/gems/sprockets-rails-2.2.4/lib/sprockets/rails/task.rb:64:in `block (2 levels) in define'
Tasks: TOP => environment
(See full trace by running task with --trace)
！错误：部署失败。
----->清除生成
取消链接当前
确定
! ERROR: Deploy failed.
-----> Cleaning up build
Unlinking current OK
！命令失败。
状态19失败
! Command failed. Failed with status 19
推荐答案
您必须添加
gem 'pg'
c> GEMFILE ，您可以在第一行错误中看到它：
In your GEMFILE, and you can see it in first row of error:
Gem::LoadError: Specified 'postgresql' for database adapter,
but the gem is not loaded.
Add `gem 'pg'` to your Gemfile (and ensure its version is at the minimum required by ActiveRecord).
这篇关于Gem :: LoadError：为数据库适配器指定了“postgresql”，但是未加载gem的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！