Rails:如何在 form_for 中使用 hidden_​​field? [英] Rails: How do I use hidden_field in a form_for?

问题描述

我已经阅读了这个，但我RoR 的新手，所以我在理解它时有点困难.我正在使用一个表单来创建一个新的请求记录，并且我需要发送的所有变量都已经存在.这是我需要发送的数据(这是在一个 do 循环中):

:user_id =>w[:requesteeID]:requesteeName =>当前用户名:requesteeEmail =>current_user.email:信息 =>电子

这是我的表单，到目前为止还可以使用，但只为所有内容发送 NULL 值:

<% form_for(:request, :url => requests_path) do |f|％＞<div class="actions"><%= f.submit e %>

<%结束%>

如何使用 hidden_​​fields 发送我已有的数据?感谢阅读.

解决方案

Ref hidden_​​field 或 hidden_​​field_tag

<% form_for(:request, :url => requests_path) do |f|％＞<div class="actions"><%= f.hidden_​​field :some_column %><%= hidden_​​field_tag 'selected', 'none' %><%= f.submit e %>

<%结束%>

然后在控制器中

 params[:selected]="none"params[:request][:some_column] = request.some_column

使用时注意

 <%= f.hidden_​​field :some_column %>

它变成了html

<input type="hidden" id="request_some_column" name="request[some_column]" value="#{@request.some_column}"/>

当你使用

<%= hidden_​​field_tag 'selected', 'none' %>

它变成了html

I've read this, but I'm new to RoR so I'm having a little trouble understanding it. I'm using a form to create a new request record, and all of the variables that I need to send exist already. Here is the data I need to send (this is in a do loop):

:user_id => w[:requesteeID]
:requesteeName => current_user.name
:requesteeEmail => current_user.email
:info => e

Here's my form, which works so far, but only send NULL values for everything:

<% form_for(:request, :url => requests_path) do |f| %>
    <div class="actions">
        <%= f.submit e %>
    </div>
<% end %>

How do I use hidden_fields to send the data I already have? Thanks for reading.

解决方案

Ref hidden_field or hidden_field_tag

<% form_for(:request, :url => requests_path) do |f| %>
    <div class="actions">
        <%= f.hidden_field :some_column %>
        <%= hidden_field_tag 'selected', 'none'  %>
        <%= f.submit e %>
    </div>
<% end %>

then in controller

 params[:selected]="none"
 params[:request][:some_column] = request.some_column

Note when you used

   <%= f.hidden_field :some_column %>

it change to html

<input type="hidden" id="request_some_column" name="request[some_column]" value="#{@request.some_column}" />

and when you used

<%= hidden_field_tag 'selected', 'none'  %>

it change to html

   <input id="selected" name="selected" type="hidden" value="none"/>

这篇关于Rails:如何在 form_for 中使用 hidden_​​field?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！