如何有一个下拉<select>轨道形式的字段? [英] How to have a drop down <select> field in a rails form?

问题描述

我正在创建一个脚手架 -

I am creating a scaffold -

rails g scaffold Contact email:string email_provider:string 

但我希望电子邮件提供商是一个下拉列表(使用 gmail/yahoo/msn 作为选项)而不是文本字段.我怎样才能做到这一点 ?

but I want the email provider to be a drop down (with gmail/yahoo/msn as options) and not a text field. How can I do this ?

推荐答案

你可以看看 Rails 文档.无论如何，以您的形式:

You can take a look at the Rails documentation . Anyways , in your form :

  <%= f.collection_select :provider_id, Provider.order(:name),:id,:name, include_blank: true %>

如您所料，您应该在另一个模型 -Provider 中预定义电子邮件提供程序，以便从中选择它们.

As you can guess , you should predefine email-providers in another model -Provider , to have where to select them from .

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