English 中文(简体)
表格的协同效应——在从检查箱修建一个阵列时
原标题:Syntax for form_for when building an array from checkboxes

单米制成令标的表格,而订单有许多产品,通过称为“教令”的表格。 因此,我们这样做了:

<% @order = Order.new %>
<% form_for @order do |f| %>
  <% @products.each do |product| %>
    ... want to iterate over products here to build up "order[product_ids][]", with one checkbox per product
  <% end %>
<% end %>

通常每个产品都有一个检查箱——标签。

<%= check_box_tag "order[product_ids][]", product.id, @order.product_ids.include?(product.id) %>

但是,尽管工作罚款,但总是感觉到范围太大。 是否有办法与<代码>f.check_ Box syntax? 重要说明——关于Im在铁路中工作的第2.2.2项项目,因此,在铁路2中开展工作的解决方案是理想的。

问题回答

Rails <= 2.x (original)

<% @products.each do |product| -%>

  <% fields_for  product[]  , product do |product_fields| -%>

    [...]
    <%= product_fields.check_box :id %>

  <% end -%>

<% end -%>

Rails >= 3.x(续)

<% @products.each do |product| -%>

  <%= fields_for  product[]  , product do |product_fields| -%>

    [...]
    <%= product_fields.check_box :id %>

  <% end -%>

<% end -%>

I know the author was looking for version 2 answers, but this is the top hit for google and I though I would update:

我们可以这样做(我用4.0,没有知道它会走多远):

<%= form_for @order do |form| %>
  <%= form.collection_check_boxes(:product_ids, Product.all, :id, :labeling_method ) %>
<% end %>

For more info: http://weiapi.rubyonrails.org.





相关问题
rails collection_select vs. select

collection_select and select Rails helpers: Which one should I use? I can t see a difference in both ways. Both helpers take a collection and generates options tags inside a select tag. Is there a ...

SSL slowness in EC2

We ve deployed our rails app to EC2. In our setup, we have two proxies on small instances behind round-robin DNS. These run nginx load balancers for a dynamically growing and shrinking farm of web ...

Auth-code with A-Za-z0-9 to use in an URL parameter

As part of a web application I need an auth-code to pass as a URL parameter. I am currently using (in Rails) : Digest::SHA1.hexdigest((object_id + rand(255)).to_s) Which provides long strings like : ...

RubyCAS-Client question: Rails

I ve installed RubyCAS-Client version 2.1.0 as a plugin within a rails app. It s working, but I d like to remove the ?ticket= in the url. Is this possible?

activerecord has_many :through find with one sql call

I have a these 3 models: class User < ActiveRecord::Base has_many :permissions, :dependent => :destroy has_many :roles, :through => :permissions end class Permission < ActiveRecord::...

Ordering a hash to xml: Rails

I m building an xml document from a hash. The xml attributes need to be in order. How can this be accomplished? hash.to_xml

Text Editor for Ruby-on-Rails

guys which text editor is good for Rubyonrails? i m using Windows and i was using E-Texteditor but its not free n its expired now can anyone plese tell me any free texteditor? n which one is best an ...

How to get SQL queries for each user where env is production

I’m developing an application dedicated to generate statistical reports, I would like that user after saving their stat report they save sql queries too. To do that I wrote the following module: ...

热门标签