如何将布尔值重置为“默认值:false"在一天结束时? [英] How to reset boolean to "default: false" at end of day?

问题描述

我在数据库中有一个布尔值:t.boolean "completed"，默认值:false

I have a boolean in the DB: t.boolean "completed", default: false

我ONLY在主页上显示那些仍然false.

I ONLY show those still false on the home page.

如果用户勾选一项:

<span class="glyphicon glyphicon-ok"><% :completed %></span>

Completed 变为 true 并因此从主页中消失.

Completed becomes true and it therefore disappears from the home page.

不过，在每一天结束时，我们如何才能自动将所有内容重置为 default: false?

At the end of each day though, how can we automatically reset everything back to default: false?

我是否要创建一个模型方法或范围来执行此操作?

Do I create a model method or scope to do this?

推荐答案

我会使用时间戳而不是布尔值.这有两个好处:

I would use a timestamp instead of a boolean. That has two benefits:

1. 您知道用户上次填写的时间
2. 您无需在午夜通过 cron 作业重置该值.

步骤如下:首先从数据库中删除 completed 布尔列，然后添加一个 completed_at 时间戳列.

The steps would be: First remove the completed boolean column from your database and add instead a completed_at timestamp column.

第二次向模型添加两个方法，允许与之前的布尔列相同的行为.这意味着不需要更改控制器或视图:

Second add two methods to your model that allow the same behaviour than the boolean column before. That means there is not need to change the controller or views:

def completed=(boolean)
  self.completed_at = boolean ? Time.current : nil
end

def completed
  completed_at && completed_at >= Time.current.beginning_of_day
end

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