Ruby版本：ruby 2.1.3p242（2014-09-19修订版47630）[x64-mingw32]
Rails版本：Rails 4.1.6
寡妇：win7 64bit
sqlite3-1.3.9-x64-mingw32.gemspec已更改为s.require_paths = [＆＃34; lib / sqlite3_native＆＃34;]
Ruby / Bin中的sqlite3.dll和Gemfile的sqlite3版本与Gemfile.lock相同，rails服务器没问题，但是当访问网站时它返回此错误：Could not load 'active_record/connection_adapters/sqlite3_adapter'. Make sure that the adapter in config/database.yml is valid. If you use an adapter other than 'mysql', 'mysql2', 'postgresql' or 'sqlite3' add the necessary adapter gem to the Gemfile.
的相关信息：
activesupport (4.1.6) lib/active_support/dependencies.rb:247:in require' activesupport (4.1.6) lib/active_support/dependencies.rb:247:inblock in require' activesupport (4.1.6) lib/active_support/dependencies.rb:232:in load_dependency' activesupport (4.1.6) lib/active_support/dependencies.rb:247:inrequire' activerecord (4.1.6) lib/active_record/connection_adapters/sqlite3_adapter.rbin <top（必需）＆GT;＆＃39; activesupport（4.1.6）lib / active_support / dependencies.rb：247：inrequire＆＃39; activesupport（4.1.6）lib / active_support / dependencies.rb：247：在require＆＃39;中的块中 activesupport（4.1.6）lib / active_support / dependencies.rb：232：inload_dependency＆＃39; activesupport（4.1.6）lib / active_support / dependencies.rb：247：in require＆＃39; activerecord（4.1.6）lib / active_record / connection_adapters / connection_specification.rb:188：inspec＆＃39; activerecord（4.1.6）lib / active_record / connection_handling.rb：50：在establish_connection＆＃39; activerecord（4.1.6）lib / active_record / railtie.rb：129：inblock（2级）在课堂上：Railtie＆＃39; activesupport（4.1.6）lib / active_support / lazy_load_hooks.rb:38:in instance_eval＆＃39; activesupport（4.1.6）lib / active_support / lazy_load_hooks.rb：38：inexecute_hook＆＃39; activesupport（4.1.6）lib / active_support / lazy_load_hooks.rb:45：在run_load_hooks＆＃39;中的块中 activesupport（4.1.6）lib / active_support / lazy_load_hooks.rb:44:ineach＆＃39; activesupport（4.1.6）lib / active_support / lazy_load_hooks.rb：44：在run_load_hooks＆＃39; activerecord（4.1.6）lib / active_record / base.rb：326：inmodule：ActiveRecord＆＃39; activerecord（4.1.6）lib / active_record / base.rb:23:in' activerecord（4.1.6）lib / active_record / connection_adapters / abstract / connection_pool.rb：628：inrescue 在电话中＆＃39; activerecord（4.1.6）lib / active_record / connection_adapters / abstract / connection_pool.rb:619:in 叫＆＃39; activerecord（4.1.6）lib / active_record / migration.rb：380：incall＆＃39; actionpack（4.1.6）lib / action_dispatch / middleware / callbacks.rb：29：in block in call＆＃39; activesupport（4.1.6）lib / active_support / callbacks.rb:82:inrun_callbacks' actionpack（4.1.6）lib / action_dispatch / middleware / callbacks.rb：27：in call＆＃39; actionpack（4.1.6）lib / action_dispatch / middleware / reloader.rb：73：incall＆＃39; actionpack（4.1.6）lib / action_dispatch / middleware / remote_ip.rb:76:in call＆＃39; actionpack（4.1.6）lib / action_dispatch / middleware / debug_exceptions.rb:17:incall' actionpack（4.1.6）lib / action_dispatch / middleware / show_exceptions.rb：30：in call＆＃39; railties（4.1.6）lib / rails / rack / logger.rb:38:incall_app' railties（4.1.6）lib / rails / rack / logger.rb：20：in block in call＆＃39; activesupport（4.1.6）lib / active_support / tagged_logging.rb:68：inblock in tagged＆＃39; activesupport（4.1.6）lib / active_support / tagged_logging.rb:26:in tagged＆＃39; activesupport（4.1.6）lib / active_support / tagged_logging.rb:68：凹版＆＃39; railties（4.1.6）lib / rails / rack / logger.rb：20：in call＆＃39; actionpack（4.1.6）lib / action_dispatch / middleware / request_id.rb:21:incall' rack（1.5.2）lib / rack / methodoverride.rb：21：in call＆＃39; rack（1.5.2）lib / rack / runtime.rb:17:incall' activesupport（4.1.6）lib / active_support / cache / strategy / local_cache_middleware.rb:26:in 叫＆＃39; rack（1.5.2）lib / rack / lock.rb:17:incall' actionpack（4.1.6）lib / action_dispatch / middleware / static.rb:64:in call＆＃39; rack（1.5.2）lib / rack / sendfile.rb:112：incall＆＃39; railties（4.1.6）lib / rails / engine.rb：514：in call＆＃39; railties（4.1.6）lib / rails / application.rb：144：incall＆＃39; rack（1.5.2）lib / rack / lock.rb:17:in call＆＃39; rack（1.5.2）lib / rack / content_length.rb:14:incall' rack（1.5.2）lib / rack / handler / webrick.rb:60:in service＆＃39; E：/Tool/Ruby21-x64/lib/ruby/2.1.0/webrick/httpserver.rb：138：役＆＃39; E：/Tool/Ruby21-x64/lib/ruby/2.1.0/webrick/httpserver.rb:94:in run＆＃39; E：/Tool/Ruby21-x64/lib/ruby/2.1.0/webrick/server.rb:295：start_thread中的inblock＆＃39;
答案 0 :(得分：2)
我的解决方案（Win7 x64）是卸载所有不必要的sqlite3版本。我安装了1.3.9,1.3.10和1.3.11，所以我删除了.9和.10并更新了我的gemfile以使用.11。
gem uninstall sqlite3
bundle install
使用1.3.11我不需要应用你提到的s.require_paths=["lib/sqlite3_native"] hack。
答案 1 :(得分：1)
我遇到了同样的错误，安装了相同版本的sqlite3 gem，并且也改变了特定的gemspec路径。环顾四周后我做了一个简单的
gem install sqlite3
在命令行上修复了错误。
答案 2 :(得分：-3)
转到您应用的gemfile并将sqlite3 gem版本编辑为您已安装的版本。
gem 'sqlite3', '1.3.9'