如何添加onchange事件以选择Rails中的标签 [英] How to add an onchange event to select tag in rails

问题描述

如何在此处添加onchange事件?

How do I add an onchange event here?

框架:导轨
数据库:MySQL

Framework: rails
Database: MySQL

我正在从数据库中填充选项，这使我不得不使用options_from_collection_for_select

I am populating the options from the database and that made me use options_from_collection_for_select

select_tag(:variable,options_from_collection_for_select(:all, :id, :name))

推荐答案

select_tag 将options哈希作为其最终参数，您可以在其中添加用于select的任何HTML属性.因此，添加一个onchange属性:

select_tag takes an options hash as its final parameter, in which you can add any HTML attributes for the select. So to add an onchange attribute:

select_tag :variable, options_from_collection_for_select(:all, :id, :name), :onchange => 'your_onchange_handler()'

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