datetime_select 上的值为零? [英] Nil value on datetime_select?

问题描述

当将 <%= f.datetime_select :start %> 用于新"对象表单时，如何设置选项以不选择默认日期而是选择 nil/null 值?相关模型中的字段可以选择为空，但默认情况下 datetime_select 控件没有空选项.

解决方案

我想你想要:

f.datetime_select :start, :include_blank =>真实

当 start 为 nil 时，字段将选择空白选项.这也允许用户不输入日期.

有关详细信息，请参阅有关 date_select 的文档.>

When using <%= f.datetime_select :start %> for a "new" object form, how can you set the options to not select a date by default but rather a nil/null value? The field in the related model can optionally be null but by default the datetime_select control doesn't have a null option.

解决方案

I think you want:

f.datetime_select :start, :include_blank => true

When start is nil, the fields will select the blank option. This also allows users to not enter a date.

See the documentation for date_select for details.

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