Ruby on rails 3 运行迁移但通过控制台运行时遇到问题_Ruby On Rails 3_Rails Migrations

Ruby on rails 3 运行迁移但通过控制台运行时遇到问题

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Ruby on rails 3 运行迁移但通过控制台运行时遇到问题,ruby-on-rails-3,rails-migrations,Ruby On Rails 3,Rails Migrations,当我通过迁移运行此查询时，它会给出错误消息- 质疑- ActionEvent.includes([:historic_task_allocation, {:task_results =>[:task_result_status, :user]}]).where("action_events.ae_type = 0 AND action_events.result_status <> 2 AND task_result_statuses.is_completion AND use

当我通过迁移运行此查询时，它会给出错误消息-

质疑-

ActionEvent.includes([:historic_task_allocation, {:task_results =>[:task_result_status, :user]}]).where("action_events.ae_type = 0 AND action_events.result_status <> 2 AND task_result_statuses.is_completion AND users.id NOT IN (SELECT user_id FROM allocation_user_links aul WHERE aul.task_allocation_id = task_allocations.id AND aul.valid_from < action_events.date AND (aul.valid_to > action_events.date OR aul.valid_to IS NULL))")

错误-

Mysql2:：错误：中的未知列“任务分配。可以晚些完成吗？” “字段列表”：

但是通过它的工作

问题出在哪里？

只需在self.up方法中的查询上方添加以下行，即可解决此问题

  TaskAllocation.reset_column_information  # Resets all the cached information about columns, which will cause them to be reloaded on the next request.

除了这个查询，您在迁移中还做了什么？