如何在mongoid上按名称查询字段？

Question

如何获得相同查询的结果：

Test.where(name: "Depeche Mode").first.last_connection_date

通过字符串更改 last_connection_date

@desired_field = "last_connection_date"
Test.where(name: "Depeche Mode").first.(@desired_field)

Answer 1

你可以利用send

Test.where(name: "Depeche Mode").send(@desired_field.to_sym)