Question

我想在Rails中查询日期范围：

User.where(:created_at => Time.now.beginning_of_day..Time.now.end_of_day)

Time.now.beginning_if_day is at 00:00:00
Time.now.end_of_day is at: 23.59.59

我的范围是否包含这两个边界时间，还是使用<和>？

Answer 1

打开好的控制台可以解答所有问题。

..在db

中调用BETWEEN语句

User.where(created_at: Time.zone.today.beginning_of_day..Time.zone.today.end_of_day).to_sql

# SELECT "users".* 
# FROM "users" 
# WHERE ("users"."created_at" BETWEEN '2017-06-06 00:00:00' AND '2017-06-06 23:59:59.999999')

使用...，它会调用>= <魔法。

User.where(created_at: Time.zone.today.beginning_of_day...Time.zone.today.end_of_day).to_sql

# SELECT "users".* 
# FROM "users" 
# WHERE ("users"."created_at" >= '2017-06-06 00:00:00' AND 
#        "users"."created_at" < '2017-06-06 23:59:59.999999')

Rails 5.1包含一个名为all_day的小帮手，这使得这成为可能。它发出与..

相同的陈述

Users.where(created_at: Time.zone.today.all_day).to_sql

注意：

如果你真的很偏执并且有一个非常重要的救生应用，Time.zone.today实际上可能会在调用beginning_of_day和end_of_day后的几毫秒内发生变化，所以你可以做那么。

today = Time.zone.today Users.where(created_at: today.beginning_of_day..today.end_of_day)

Rails中的日期范围是否包括边界日期？

1 个答案: