我使用设计视图重置用户密码 我发送了reset_password_token和新密码，我收到了此错误。
有什么想法吗？
我很乐意添加任何必要的细节。我使用rails 3.2 with devise＆＃39; 3.5.6＆＃39;
NoMethodError (undefined method `to_datetime' for nil:NilClass):
activesupport (3.2.14) lib/active_support/core_ext/date_time/calculations.rb:141:in `<=>'
activesupport (3.2.14) lib/active_support/core_ext/time/calculations.rb:359:in `compare_with_coercion'
activesupport (3.2.14) lib/active_support/time_with_zone.rb:190:in `<=>'
activerecord (3.2.14) lib/active_record/attribute_methods/dirty.rb:90:in `=='
activerecord (3.2.14) lib/active_record/attribute_methods/dirty.rb:90:in `!='
activerecord (3.2.14) lib/active_record/attribute_methods/dirty.rb:90:in `_field_changed?'
activerecord (3.2.14) lib/active_record/attribute_methods/serialization.rb:97:in `_field_changed?'
activerecord (3.2.14) lib/active_record/attribute_methods/dirty.rb:63:in `write_attribute'
activerecord (3.2.14) lib/active_record/attribute_methods/time_zone_conversion.rb:47:in `reset_password_sent_at='
devise (3.5.6) lib/devise/models/recoverable.rb:94:in `clear_reset_password_token'
devise (3.5.6) lib/devise/models/recoverable.rb:32:in `block (2 levels) in <module:Recoverable>'
activesupport (3.2.14) lib/active_support/callbacks.rb:407:in `_run__312818332643827378__update__4267586685858662397__callbacks'
activesupport (3.2.14) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.14) lib/active_support/callbacks.rb:385:in `_run_update_callbacks'
activesupport (3.2.14) lib/active_support/callbacks.rb:81:in `run_callbacks'
activerecord (3.2.14) lib/active_record/callbacks.rb:272:in `update'
activerecord (3.2.14) lib/active_record/persistence.rb:348:in `create_or_update'
activerecord (3.2.14) lib/active_record/callbacks.rb:264:in `block in create_or_update'
activesupport (3.2.14) lib/active_support/callbacks.rb:414:in `_run__312818332643827378__save__4267586685858662397__callbacks'
activesupport (3.2.14) lib/active_support/callbacks.rb:405:in `__run_callback'
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activerecord (3.2.14) lib/active_record/callbacks.rb:264:in `create_or_update'
activerecord (3.2.14) lib/active_record/persistence.rb:84:in `save'
activerecord (3.2.14) lib/active_record/validations.rb:50:in `save'
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activerecord (3.2.14) lib/active_record/transactions.rb:259:in `block (2 levels) in save'
activerecord (3.2.14) lib/active_record/transactions.rb:313:in `block in with_transaction_returning_status'
activerecord (3.2.14) lib/active_record/connection_adapters/abstract/database_statements.rb:192:in `transaction'
activerecord (3.2.14) lib/active_record/transactions.rb:208:in `transaction'
activerecord (3.2.14) lib/active_record/transactions.rb:311:in `with_transaction_returning_status'
activerecord (3.2.14) lib/active_record/transactions.rb:259:in `block in save'
activerecord (3.2.14) lib/active_record/transactions.rb:270:in `rollback_active_record_state!'
activerecord (3.2.14) lib/active_record/transactions.rb:258:in `save'
newrelic_rpm (3.15.0.314) lib/new_relic/agent/instrumentation/active_record_helper.rb:26:in `block in save'
newrelic_rpm (3.15.0.314) lib/new_relic/agent/transaction.rb:848:in `with_database_metric_name'
newrelic_rpm (3.15.0.314) lib/new_relic/agent.rb:572:in `with_database_metric_name'
newrelic_rpm (3.15.0.314) lib/new_relic/agent/instrumentation/active_record_helper.rb:25:in `save'
devise (3.5.6) lib/devise/models/recoverable.rb:48:in `reset_password'
devise (3.5.6) lib/devise/models/recoverable.rb:141:in `reset_password_by_token'
devise (3.5.6) app/controllers/devise/passwords_controller.rb:32:in `update'
actionpack (3.2.14) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
actionpack (3.2.14) lib/abstract_controller/base.rb:167:in `process_action'
actionpack (3.2.14) lib/action_controller/metal/rendering.rb:10:in `process_action'
actionpack (3.2.14) lib/abstract_controller/callbacks.rb:18:in `block in process_action'
activesupport (3.2.14) lib/active_support/callbacks.rb:447:in `_run__1749634817633484351__process_action__1911466050157971041__callbacks'
activesupport (3.2.14) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.14) lib/active_support/callbacks.rb:385:in `_run_process_action_callbacks'
activesupport (3.2.14) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.2.14) lib/abstract_controller/callbacks.rb:17:in `process_action'
actionpack (3.2.14) lib/action_controller/metal/rescue.rb:29:in `process_action'
actionpack (3.2.14) lib/action_controller/metal/instrumentation.rb:30:in `block in process_action'
activesupport (3.2.14) lib/active_support/notifications.rb:123:in `block in instrument'
activesupport (3.2.14) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (3.2.14) lib/active_support/notifications.rb:123:in `instrument'
actionpack (3.2.14) lib/action_controller/metal/instrumentation.rb:29:in `process_action'
actionpack (3.2.14) lib/action_controller/metal/params_wrapper.rb:207:in `process_action'
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newrelic_rpm (3.15.0.314) lib/new_relic/rack/agent_hooks.rb:30:in `traced_call'
newrelic_rpm (3.15.0.314) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in `call'
newrelic_rpm (3.15.0.314) lib/new_relic/rack/browser_monitoring.rb:32:in `traced_call'
newrelic_rpm (3.15.0.314) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in `call'
newrelic_rpm (3.15.0.314) lib/new_relic/rack/developer_mode.rb:48:in `traced_call'
newrelic_rpm (3.15.0.314) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in `call'
warden (1.2.6) lib/warden/manager.rb:35:in `block in call'
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warden (1.2.6) lib/warden/manager.rb:34:in `call'
newrelic_rpm (3.15.0.314) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in `call'
actionpack (3.2.14) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call'
newrelic_rpm (3.15.0.314) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in `call'
rack (1.4.7) lib/rack/etag.rb:23:in `call'
newrelic_rpm (3.15.0.314) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in `call'
rack (1.4.7) lib/rack/conditionalget.rb:35:in `call'
newrelic_rpm (3.15.0.314) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in `call'
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newrelic_rpm (3.15.0.314) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in `call'
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actionpack (3.2.14) lib/action_dispatch/middleware/cookies.rb:341:in `call'
newrelic_rpm (3.15.0.314) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in `call'
activerecord (3.2.14) lib/active_record/query_cache.rb:64:in `call'
newrelic_rpm (3.15.0.314) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in `call'
activerecord (3.2.14) lib/active_record/connection_adapters/abstract/connection_pool.rb:479:in `call'
newrelic_rpm (3.15.0.314) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in `call'
actionpack (3.2.14) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
activesupport (3.2.14) lib/active_support/callbacks.rb:405:in `_run__349007920982004187__call__4267586685858662397__callbacks'
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newrelic_rpm (3.15.0.314) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in `call'
actionpack (3.2.14) lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
newrelic_rpm (3.15.0.314) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in `call'
actionpack (3.2.14) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
newrelic_rpm (3.15.0.314) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in `call'
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newrelic_rpm (3.15.0.314) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in `call'
railties (3.2.14) lib/rails/rack/logger.rb:32:in `call_app'
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railties (3.2.14) lib/rails/rack/logger.rb:16:in `call'
newrelic_rpm (3.15.0.314) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in `call'
actionpack (3.2.14) lib/action_dispatch/middleware/request_id.rb:22:in `call'
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rack (1.4.7) lib/rack/methodoverride.rb:21:in `call'
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rack (1.4.7) lib/rack/runtime.rb:17:in `call'
newrelic_rpm (3.15.0.314) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in `call'
activesupport (3.2.14) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
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rack (1.4.7) lib/rack/lock.rb:15:in `call'
newrelic_rpm (3.15.0.314) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in `call'
actionpack (3.2.14) lib/action_dispatch/middleware/static.rb:63:in `call'
newrelic_rpm (3.15.0.314) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in `call'
railties (3.2.14) lib/rails/engine.rb:484:in `call'
railties (3.2.14) lib/rails/application.rb:231:in `call'
railties (3.2.14) lib/rails/railtie/configurable.rb:30:in `method_missing'
newrelic_rpm (3.15.0.314) lib/new_relic/agent/instrumentation/middleware_tracing.rb:96:in `call'
rack (1.4.7) lib/rack/content_length.rb:14:in `call'
railties (3.2.14) lib/rails/rack/log_tailer.rb:17:in `call'
rack (1.4.7) lib/rack/handler/webrick.rb:59:in `service'
/Users/uriklar/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/webrick/httpserver.rb:140:in `service'
/Users/uriklar/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/webrick/httpserver.rb:96:in `run'
/Users/uriklar/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/webrick/server.rb:296:in `block in start_thread'
Rendered /Users/uriklar/.rvm/gems/ruby-2.3.0/gems/actionpack-3.2.14/lib/action_dispatch/middleware/templates/rescues/_trace.erb (1.1ms)
Rendered /Users/uriklar/.rvm/gems/ruby-2.3.0/gems/actionpack-3.2.14/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (0.9ms)
Rendered /Users/uriklar/.rvm/gems/ruby-2.3.0/gems/actionpack-3.2.14/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (50.4ms)
^[[1;2D
答案 0 :(得分：1)
好的，显然这是可以做的事情： 我使用的是letter_opener，因此密码重置电子邮件实际上并未发送 时间不能在我的开发机器上正确设置
答案 1 :(得分：1)
我发现了一个类似的问题，我的＆＃34; RAILS_ENV =开发包exec rake db：drop db：create db：migrate db：seed＆＃34;命令工作将与ruby 2.2.3p173，但与ruby 2.3.0p0，它会抛出以下错误：
rake aborted!
NoMethodError: undefined method `to_datetime' for nil:NilClass
.../.rvm/gems/ruby-2.3.0@atlantis/gems/activesupport-3.2.17/lib/active_support/core_ext/date_time/calculations.rb:141:in `<=>'