Databases
StackOverflow2013
Postsdbo
PORuby - ActiveRecord::ConnectionNotEstablished
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PORuby - ActiveRecord::ConnectionNotEstablished
    primarykey
    data
    text
    <p>I am rather new to Ruby and have been following along with the book "Ruby On Rails 3 Tutorial - Learn Ruby by Example - by Michael Hartl". I am currently in Chapter 3 which discusses static pages. </p> <p>In this chapter, I entered the following command into the prompt: <code>rails generate controller Pages home contact</code> and everything worked fine. </p> <p>Then the book directs me to <code>http://localhost:3000/pages/home</code>. When I point my browser there, I receive the following error.</p> <pre> ActiveRecord::ConnectionNotEstablished ActiveRecord::ConnectionNotEstablished Rails.root: /home/ralph/railsprojects/sample_app Application Trace | Framework Trace | Full Trace </pre> <p>The routes and controller erb don't appear to have any errors. Is this a database related error? Any ideas?</p> <p>Thanks, DMAT</p> <p>Update:</p> <p>This is the code in my database.yml file.</p> <pre><code># SQLite version 3.x # gem install sqlite3 # # Ensure the SQLite 3 gem is defined in your Gemfile # gem 'sqlite3' development: adapter: sqlite3 database: db/development.sqlite3 pool: 5 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: sqlite3 database: db/test.sqlite3 pool: 5 timeout: 5000 production: adapter: sqlite3 database: db/production.sqlite3 pool: 5 timeout: 5000 </code></pre> <p>Here is the information from the Framework Trace:</p> <pre><code> activerecord (3.1.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:409:in `retrieve_connection' activerecord (3.1.1) lib/active_record/connection_adapters/abstract/connection_specification.rb:107:in `retrieve_connection' activerecord (3.1.1)lib/active_record/connection_adapters/abstract/connection_specification.rb:89:in `connection' activerecord (3.1.1) lib/active_record/query_cache.rb:65:in `call' activerecord (3.1.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:477:in `call' actionpack (3.1.1) lib/action_dispatch/middleware/callbacks.rb:29:in `call' activesupport (3.1.1) lib/active_support/callbacks.rb:392:in `_run_call_callbacks' activesupport (3.1.1) lib/active_support/callbacks.rb:81:in `send' activesupport (3.1.1) lib/active_support/callbacks.rb:81:in `run_callbacks' actionpack (3.1.1) lib/action_dispatch/middleware/callbacks.rb:28:in `call' actionpack (3.1.1) lib/action_dispatch/middleware/reloader.rb:68:in `call' rack (1.3.5) lib/rack/sendfile.rb:101:in `call' actionpack (3.1.1) lib/action_dispatch/middleware/remote_ip.rb:48:in `call' actionpack (3.1.1) lib/action_dispatch/middleware/show_exceptions.rb:47:in `call' railties (3.1.1) lib/rails/rack/logger.rb:13:in `call' rack (1.3.5) lib/rack/methodoverride.rb:24:in `call' rack (1.3.5) lib/rack/runtime.rb:17:in `call' activesupport (3.1.1) lib/active_support/cache/strategy/local_cache.rb:72:in `call' rack (1.3.5) lib/rack/lock.rb:15:in `call' actionpack (3.1.1) lib/action_dispatch/middleware/static.rb:53:in `call' railties (3.1.1) lib/rails/engine.rb:456:in `call' railties (3.1.1) lib/rails/rack/content_length.rb:16:in `call' railties (3.1.1) lib/rails/rack/log_tailer.rb:14:in `call' rack (1.3.5) lib/rack/handler/webrick.rb:59:in `service' /usr/lib/ruby/1.8/webrick/httpserver.rb:104:in `service' /usr/lib/ruby/1.8/webrick/httpserver.rb:65:in `run' /usr/lib/ruby/1.8/webrick/server.rb:173:in `start_thread' /usr/lib/ruby/1.8/webrick/server.rb:162:in `start' /usr/lib/ruby/1.8/webrick/server.rb:162:in `start_thread' /usr/lib/ruby/1.8/webrick/server.rb:95:in `start' /usr/lib/ruby/1.8/webrick/server.rb:92:in `each' /usr/lib/ruby/1.8/webrick/server.rb:92:in `start' /usr/lib/ruby/1.8/webrick/server.rb:23:in `start' /usr/lib/ruby/1.8/webrick/server.rb:82:in `start' rack (1.3.5) lib/rack/handler/webrick.rb:13:in `run' rack (1.3.5) lib/rack/server.rb:265:in `start' railties (3.1.1) lib/rails/commands/server.rb:70:in `start' railties (3.1.1) lib/rails/commands.rb:54 railties (3.1.1) lib/rails/commands.rb:49:in `tap' railties (3.1.1) lib/rails/commands.rb:49 script/rails:6:in `require' script/rails:6 </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USDmat00
    1. USDmat00
    plurals
    1. This table or related slice is empty.
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. PORuby - ActiveRecord::ConnectionNotEstablished
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PORuby - ActiveRecord::ConnectionNotEstablished
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    3. VO
      singulars
      1. PORuby - ActiveRecord::ConnectionNotEstablished
      1. This table or related slice is empty.
      1. VTUpMod
    1. COdo you have a config/database.yml?
      singulars
      1. PORuby - ActiveRecord::ConnectionNotEstablished
      1. UScorroded
    2. CONo. In my DB folder, there is only a seeds.rb file. I tried this command in the kernel but it errored out. rake db:create db:migrate
      singulars
      1. PORuby - ActiveRecord::ConnectionNotEstablished
      1. USDmat00
    3. COThere should be a default `database.yml` file; are you sure?
      singulars
      1. PORuby - ActiveRecord::ConnectionNotEstablished
      1. USDave Newton
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload