Specified 'sqlite3' for database adapter, but the gem is not loaded. Add `gem 'sqlite3'` to your Gemfile.

Rails.root: C:/!!!!!RUBY_SERVER/blog
Application Trace | Framework Trace | Full Trace

activerecord (4.0.2) lib/active_record/connection_adapters/connection_specification.rb:58:in `rescue in resolve_hash_connection'
activerecord (4.0.2) lib/active_record/connection_adapters/connection_specification.rb:55:in `resolve_hash_connection'
activerecord (4.0.2) lib/active_record/connection_adapters/connection_specification.rb:46:in `resolve_string_connection'
activerecord (4.0.2) lib/active_record/connection_adapters/connection_specification.rb:30:in `spec'
activerecord (4.0.2) lib/active_record/connection_handling.rb:39:in `establish_connection'
activerecord (4.0.2) lib/active_record/railtie.rb:176:in `block (2 levels) in <class:Railtie>'
activesupport (4.0.2) lib/active_support/lazy_load_hooks.rb:38:in `instance_eval'
activesupport (4.0.2) lib/active_support/lazy_load_hooks.rb:38:in `execute_hook'
activesupport (4.0.2) lib/active_support/lazy_load_hooks.rb:45:in `block in run_load_hooks'
activesupport (4.0.2) lib/active_support/lazy_load_hooks.rb:44:in `each'
activesupport (4.0.2) lib/active_support/lazy_load_hooks.rb:44:in `run_load_hooks'
activerecord (4.0.2) lib/active_record/base.rb:322:in `<module:ActiveRecord>'
activerecord (4.0.2) lib/active_record/base.rb:22:in `<top (required)>'
activerecord (4.0.2) lib/active_record/query_cache.rb:50:in `restore_query_cache_settings'
activerecord (4.0.2) lib/active_record/query_cache.rb:43:in `rescue in call'
activerecord (4.0.2) lib/active_record/query_cache.rb:32:in `call'
activerecord (4.0.2) lib/active_record/connection_adapters/abstract/connection_pool.rb:626:in `call'
activerecord (4.0.2) lib/active_record/migration.rb:369:in `call'
actionpack (4.0.2) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
activesupport (4.0.2) lib/active_support/callbacks.rb:373:in `_run__1411546765__call__callbacks'
activesupport (4.0.2) lib/active_support/callbacks.rb:80:in `run_callbacks'
actionpack (4.0.2) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
actionpack (4.0.2) lib/action_dispatch/middleware/reloader.rb:64:in `call'
actionpack (4.0.2) lib/action_dispatch/middleware/remote_ip.rb:76:in `call'
actionpack (4.0.2) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
actionpack (4.0.2) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
railties (4.0.2) lib/rails/rack/logger.rb:38:in `call_app'
railties (4.0.2) lib/rails/rack/logger.rb:20:in `block in call'
activesupport (4.0.2) lib/active_support/tagged_logging.rb:67:in `block in tagged'
activesupport (4.0.2) lib/active_support/tagged_logging.rb:25:in `tagged'
activesupport (4.0.2) lib/active_support/tagged_logging.rb:67:in `tagged'
railties (4.0.2) lib/rails/rack/logger.rb:20:in `call'
actionpack (4.0.2) lib/action_dispatch/middleware/request_id.rb:21:in `call'
rack (1.5.2) lib/rack/methodoverride.rb:21:in `call'
rack (1.5.2) lib/rack/runtime.rb:17:in `call'
activesupport (4.0.2) lib/active_support/cache/strategy/local_cache.rb:83:in `call'
rack (1.5.2) lib/rack/lock.rb:17:in `call'
actionpack (4.0.2) lib/action_dispatch/middleware/static.rb:64:in `call'
rack (1.5.2) lib/rack/sendfile.rb:112:in `call'
railties (4.0.2) lib/rails/engine.rb:511:in `call'
railties (4.0.2) lib/rails/application.rb:97:in `call'
rack (1.5.2) lib/rack/lock.rb:17:in `call'
rack (1.5.2) lib/rack/content_length.rb:14:in `call'
rack (1.5.2) lib/rack/handler/webrick.rb:60:in `service'
E:/Ruby200-x64/lib/ruby/2.0.0/webrick/httpserver.rb:138:in `service'
E:/Ruby200-x64/lib/ruby/2.0.0/webrick/httpserver.rb:94:in `run'
E:/Ruby200-x64/lib/ruby/2.0.0/webrick/server.rb:295:in `block in start_thread'