将 sqlite 更改为 pg

Question

谁能帮我解决我的问题，这是我的第一个草稿网站？

我的新问题：How come my code and postgres are not connecting

我尝试过 StackOverflow 解决方案，但似乎我一直遇到错误

这是我的database.yml：

default: &default
adapter: postgresql
pool: 5
timeout: 5000

development:
    adapter: postgresql
    encoding: unicode
    database: blog_development
    pool: 5
    username: opeodumakin
    password: 6391
    port: 3000
    host: localhost

test:
    adapter: postgresql
    encoding: unicode
    database: blog_development
    pool: 5
    username: opeodumakin
    password: 6391


production:
    <<: *default
    database: db/production.sqlite3

我不断收到此错误

vendor/cache/gems/activerecord-5.2.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:1013:in retrieve_connection' vendor/cache/gems/activerecord-5.2.3/lib/active_record/connection_handling.rb:118:inretrieve_connection' 供应商/缓存/gems/activerecord-5.2.3/lib/active_record/connection_handling.rb:90:in connection' vendor/cache/gems/activerecord-5.2.3/lib/active_record/migration.rb:554:incall' 供应商/缓存/gems/actionpack-5.2.3/lib/action_dispatch/middleware/callbacks.rb:28:in block in call' vendor/cache/gems/activesupport-5.2.3/lib/active_support/callbacks.rb:98:inrun_callbacks' 供应商/缓存/gems/actionpack-5.2.3/lib/action_dispatch/middleware/callbacks.rb:26:in call' vendor/cache/gems/actionpack-5.2.3/lib/action_dispatch/middleware/executor.rb:14:incall' 供应商/缓存/gems/actionpack-5.2.3/lib/action_dispatch/middleware/debug_exceptions.rb:61:in call' vendor/cache/gems/web-console-3.7.0/lib/web_console/middleware.rb:135:incall_app' 供应商/缓存/gems/web-console-3.7.0/lib/web_console/middleware.rb:30:in block in call' vendor/cache/gems/web-console-3.7.0/lib/web_console/middleware.rb:20:incatch' 供应商/缓存/gems/web-console-3.7.0/lib/web_console/middleware.rb:20:in call' vendor/cache/gems/actionpack-5.2.3/lib/action_dispatch/middleware/show_exceptions.rb:33:incall' vendor/cache/gems/railties-5.2.3/lib/rails/rack/logger.rb:38:in call_app' vendor/cache/gems/railties-5.2.3/lib/rails/rack/logger.rb:26:inblock in call' 供应商/缓存/gems/activesupport-5.2.3/lib/active_support/tagged_logging.rb:71:in block in tagged' vendor/cache/gems/activesupport-5.2.3/lib/active_support/tagged_logging.rb:28:intagged' 供应商/缓存/gems/activesupport-5.2.3/lib/active_support/tagged_logging.rb:71:in tagged' vendor/cache/gems/railties-5.2.3/lib/rails/rack/logger.rb:26:incall' 供应商/缓存/gems/sprockets-rails-3.2.1/lib/sprockets/rails/quiet_assets.rb:13:in call' vendor/cache/gems/actionpack-5.2.3/lib/action_dispatch/middleware/remote_ip.rb:81:incall' 供应商/缓存/gems/actionpack-5.2.3/lib/action_dispatch/middleware/request_id.rb:27:in call' vendor/cache/gems/rack-2.0.7/lib/rack/method_override.rb:22:incall' 供应商/缓存/gems/rack-2.0.7/lib/rack/runtime.rb:22:in call' vendor/cache/gems/activesupport-5.2.3/lib/active_support/cache/strategy/local_cache_middleware.rb:29:incall' 供应商/缓存/gems/actionpack-5.2.3/lib/action_dispatch/middleware/executor.rb:14:in call' vendor/cache/gems/actionpack-5.2.3/lib/action_dispatch/middleware/static.rb:127:incall' 供应商/缓存/gems/rack-2.0.7/lib/rack/sendfile.rb:111:in call' vendor/cache/gems/railties-5.2.3/lib/rails/engine.rb:524:incall' 供应商/缓存/gems/puma-3.12.1/lib/puma/configuration.rb:227:in call' vendor/cache/gems/puma-3.12.1/lib/puma/server.rb:660:inhandle_request' vendor/cache/gems/puma-3.12.1/lib/puma/server.rb:474:in process_client' vendor/cache/gems/puma-3.12.1/lib/puma/server.rb:334:inblock in run' vendor/cache/gems/puma-3.12.1/lib/puma/thread_pool.rb:135:in `block in spawn_thread'

Answer 1

1. 添加

   gem 'pg', '0.18.3'
   

2. 更新你的 database.yml

   connection: &connection
     adapter: postgresql
     host: <%= ENV.fetch('DB_1_PORT_5432_TCP_ADDR', 'localhost') %>
     port: <%= ENV.fetch('DB_1_PORT_5432_TCP_PORT', '5432') %>
     username: postgres
     password: postgres
     pool: 5
     timeout: 5000
   
   development:
     <<: *connection
     database: development_db_name
   test:
     <<: *connection
     database: test_db_name
   
   production:
     <<: *connection
     database: production_db_name
   

3. 重启服务器