如何获取date_of_leaving为nil的记录，或者它应该在rails中的特定日期范围内？

Question

我想在query模型上写employee，其中employee date_of_leaving为nil，或者它应该在date range中}。

这是我当前的查询：

e = Employee.where.not('date_of_leaving >= ? and date_of_leaving <= ?', Date.today - 60, Date.today).where(:date_of_leaving => nil)

但它返回#<ActiveRecord::Relation []>

Answer 1

以下查询将返回在指定日期或date_of_leaving之间nil的所有员工：

Employee.where('date_of_leaving BETWEEN ? AND ? OR date_of_leaving IS NULL', Date.today - 60, Date.today)