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PORails using mysql2 instead of sqlite3
 

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    <p>I have the following configuration:</p> <ul> <li>linux ubuntu 11.04</li> <li>rails 3.0.9 </li> <li>ruby 1.9.2p290 </li> <li>mysql2 (0.2.7)</li> </ul> <p>I have created first my project using "rails new" then I have modified the Gemfile to use mysql2 version 0.2.7 (I have read that later versions are working with rails 3.1 only) Then I changed the file database.yml to use mysql2 instead of sqlite3 But now I'm getting error <strong>ActiveRecord::ConnectionNotEstablished</strong> when I try to connect to a Controller. Here are the full logs:</p> <pre><code>activerecord (3.0.9) lib/active_record/connection_adapters/abstract/connection_pool.rb:317:in `retrieve_connection' activerecord (3.0.9) lib/active_record/connection_adapters/abstract/connection_specification.rb:97:in `retrieve_connection' activerecord (3.0.9) lib/active_record/connection_adapters/abstract/connection_specification.rb:89:in `connection' activerecord (3.0.9) lib/active_record/query_cache.rb:12:in `cache' activerecord (3.0.9) lib/active_record/query_cache.rb:31:in `call' activerecord (3.0.9) lib/active_record/connection_adapters/abstract/connection_pool.rb:354:in `call' actionpack (3.0.9) lib/action_dispatch/middleware/callbacks.rb:46:in `call' activesupport (3.0.9) lib/active_support/callbacks.rb:416:in `_run_call_callbacks' actionpack (3.0.9) lib/action_dispatch/middleware/callbacks.rb:44:in `call' rack (1.2.3) lib/rack/sendfile.rb:107:in `call' actionpack (3.0.9) lib/action_dispatch/middleware/remote_ip.rb:48:in `call' actionpack (3.0.9) lib/action_dispatch/middleware/show_exceptions.rb:47:in `call' railties (3.0.9) lib/rails/rack/logger.rb:13:in `call' rack (1.2.3) lib/rack/runtime.rb:17:in `call' activesupport (3.0.9) lib/active_support/cache/strategy/local_cache.rb:72:in `call' rack (1.2.3) lib/rack/lock.rb:11:in `call' rack (1.2.3) lib/rack/lock.rb:11:in `synchronize' rack (1.2.3) lib/rack/lock.rb:11:in `call' actionpack (3.0.9) lib/action_dispatch/middleware/static.rb:30:in `call' railties (3.0.9) lib/rails/application.rb:168:in `call' railties (3.0.9) lib/rails/application.rb:77:in `send' railties (3.0.9) lib/rails/application.rb:77:in `method_missing' railties (3.0.9) lib/rails/rack/log_tailer.rb:14:in `call' rack (1.2.3) lib/rack/content_length.rb:13:in `call' rack (1.2.3) lib/rack/handler/webrick.rb:52: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 (1.2.3) lib/rack/handler/webrick.rb:13:in `run' rack (1.2.3) lib/rack/server.rb:217:in `start' railties (3.0.9) lib/rails/commands/server.rb:65:in `start' railties (3.0.9) lib/rails/commands.rb:30 railties (3.0.9) lib/rails/commands.rb:27:in `tap' railties (3.0.9) lib/rails/commands.rb:27 script/rails:6:in `require' script/rails:6 </code></pre> <p>PS: I tried almost all solutions provided in this website, but I still have the same issue.</p>
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    1. COI forgot to tell that the db:schema:load seems to be working :`rake db:schema:load -- create_table("areas", {:force=>true}) -> 1.7675s -- create_table("properties", {:force=>true}) -> 0.0399s`
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      1. PORails using mysql2 instead of sqlite3
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    2. COWhat does your database.yml file look like? Which version of MySQL have you installed?
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    3. COhere is the dev part: `development: adapter: mysql2 database: db/dev.hoha pool: 5 timeout: 5000`
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