表格中的日期时间列上的Strftime(Strftime on datetime column from table)

表格中的日期时间列上的Strftime(Strftime on datetime column from table)

我有一个来自表的实例变量ride ，它有一个列ride.pickup_at

如果我做<%= ride.pickup_at.class.name %>我得到

时间

所以Strftime应该可用。

现在，如果我做<%= ride.pickup_at.strftime('%x') %>我收到错误

nil的未定义方法`strftime'：NilClass

我需要做些什么才能使strftime可用？

I am have a instance variable ride that comes from a table and it has a column ride.pickup_at

If I do <%= ride.pickup_at.class.name %> I get

time

So Strftime should be available.

Now, if I do <%= ride.pickup_at.strftime('%x') %> I get an error

undefined method `strftime' for nil:NilClass

What do I have to do to make strftime available?

最满意答案

你可以try使用nil判断： <%= ride.pickup_at.try(:strftime, '%x') %> 。或者我认为如果ride.pickup_at nil你应该弄清楚该做什么

you can use try to do the nil judge: <%= ride.pickup_at.try(:strftime, '%x') %> .Or I think you should figure out what to do if ride.pickup_at is nil