从 Rails 表单中获取数组 [英] Get an array from a Rails form

问题描述

我需要为 account 资源设计一个表单.在这种形式中，我需要在名为 relationships 的属性中的 params 散列中收集一些 id 作为数组.

I need to design a form for a account resource. In that form, i need to collect some set of ids as an array in the params hash in attribute called relationships.

所以来自 POST 请求的最终 params[account] 哈希应该是这样的:

So the final params[account] hash from the POST request should be like:

{:name => 'somename', :relationships => ["123", "23", "23445"]}

我应该如何设计 form_for 字段?我试过了，但没有用:

How shall I design the form_for fields? I tried this, but didn't work:

<%= form_for @account do |f| %>
    <%= f.text_field :name %>

    <% @eligible_parents.each do |p| %>
        <%= f.check_box "relationships", nil, :value => p.id  %>
        <b><%= p.name %></b><br/>
      </span>
    <% end %>

    <%= f.submit "Submit" %>
<% end %>

@eligible_parents 中的元素数量每次都不同.

Number of elements in @eligible_parents varies every time.

relationships 在 account 模型中既不是关联也不是属性.

relationships is neither an association nor an attribute in account model.

我必须使用虚拟属性，但我需要从表单中填写一个数组.

I have to use virtual attributes but I need to fill in an array from a form.

请帮忙.我怎样才能做到这一点?

Please help. How can I do this?

推荐答案

您的视图中仍然需要一个 fields_for，只需使用 :relationships 作为 record_name 然后提供一个对象.

You still need a fields_for in your view, just use :relationships as the record_name then provide an object.

<%= form_for @account do |f| %>
    <%= f.text_field :name %>

    <% fields_for :relationships, @eligible_parents do |p| %>
        <%= p.check_box "relationships", nil, :value => p.object.id  %>
        <b><%= p.object.name %></b><br/>
    <% end %>

    <%= f.submit "Submit" %>
<% end %>

此处的文档:ActionView::Helpers::FormHelper

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