Rails条件在几天前？

Question

@messages = current_user.message_participantions.where(:read => false, :updated_at > 5.days.ago)

updated_at 5天前错误。我需要使用这样的格式：

find(:all, :conditions => ["created_at > ?", 5.days.ago])

Answer 1

你可以这样做：

@messages = current_user.message_participantions.where("read = ? AND updated_at > ?", false, 5.days.ago)

或者，如果由于某种原因你需要使用哈希：

@messages = current_user.message_participantions.where(:read => false, :updated_at => 5.days.ago..Time.now)

由于where方法的哈希参数值可以是精确值或范围：http://api.rubyonrails.org/classes/ActiveRecord/Base.html

Answer 2

@messages = current_user.message_participantions.where(:read => false).where("updated_at > ?", 5.days.ago)

Answer 3

我愿意：

@messages = current_user.message_participantions.where(["read = 0 AND updated_at > ?", 5.days.ago])