Rails，find_or_create_by

Question

如何通过字段find_or_create_by编写Clicks方法来创建或查找clicktime，因此在24小时内创建的点击是唯一的？

创建方法：

description = Description.find(params[:id])
click = description.clicks
        .find_or_create_by(clicktime: ___ )
Click.increment_counter(:count, click.id)

显示方法：

@descriptions = Description.includes(:clicks)
.where(:clicks => { clicktime: (Time.now - 24.hours)..Time.now })
.order('count DESC')

Answer 1

您可以使用first_or_create

代替find_or_create

click = description.clicks.where(clicktime: ___ ).first_or_create

Answer 2

description = Description.find(params[:id])
click = description.clicks.
         find_by(clicktime: (Time.now - 24.hours)..Time.now)

if click != nil
  Click.increment_counter(:count, click.id)
else
  new_click = description.clicks.create(clicktime: Time.now)
  Click.increment_counter(:count, new_click.id)
end