我有一个has_many：通过表单,我无法获得额外的属性发布到数据库.我在某个地方搞砸了参数名称.我可以获取外键发布,但我有另一个属性,我试图在连接表中跟踪.请记住,这是一个100％基于ajax的形式.这就是我所知道的
编辑：
在研究了类似的问题后,我理解我应该构建表单属性,但是我发现的代码由于某种原因不起作用.这是一些资源.
http://railsforum.com/viewtopic.php?id=20203
Rails 3,nested multi-level forms and has_many through
我不明白的是,附加product_ids是内置到rails中的.那些价值观.为什么将quantity_shipped属性附加到该数组很难？
Models and Relationships Shipment has_many :products :through => :product_shipments Product has_many :shipments :through => :product_shipments ProductShipments belongs_to :shipment,belongs_to :product ProductShipments table t.integer :shipment_id t.integer :product_id t.integer :qty_shipped <-- This is the Problem Child
此部分循环显示几次显示来自某个供应商的所有产品.它为product_ids生成一个数组,为product_shipments数量生成另一个数组.
_product_shipments.html.erb.
<div id="product_shipments_container">
<h3>Assign Products to Ship</h3>
<ul class="product_shipments" id="product_shipments">
<% Product.by_client(@client_id).each do |product| %>
<%= content_tag_for :li,product,:value => product.id do %>
<%= hidden_field_tag("shipment[product_ids][]",product.id) %>
<%= product.product_name %><%= text_field_tag("product_shipments[qty_shipped]")%> <--This is where the issue lies
<% end %>
<% end %>
</ul>
</div>
这是提交表单时的相关POST数据
"product_ids"=>["1","3"]},"product_shipments"=>{"qty_shipped"=>["32","23"]}
INSERT INTO `product_shipments` (`product_id`,`qty_shipped`,`shipment_id`) VALUES (1,NULL,155) INSERT INTO `product_shipments` (`product_id`,`shipment_id`) VALUES (3,155)
这是我的控制器中的动作
def create @shipment = Shipment.new(params[:shipment]) @product_shipments = @shipment.product_shipments.build(params[:product_shipments])
[：qty_shipped])< - 不正确,但这是我到目前为止所得到的
if @ shipment.save
respond_with @shipment,：location => shipments_url
其他
flash [：notice] =“未保存”
结束
结束
这是我遇到的最后一个问题.
TypeError (can't convert Symbol into Integer): app/controllers/shipments_controller.rb:24:in `[]' app/controllers/shipments_controller.rb:24:in `create'
得到它了.使用下面的正确答案进行更改后.我能够将控制器更正为以下内容
@product_shipments = @shipment.product_shipments.build(params[:product_shipments])
解决方法
最简单的解决方案是您需要生成一个看起来像的哈希数组
:product_shipments=>[{:product_id=>1,:qty_shipped=>32},{:product_id=>3,:qty_shipped=>23}]
而不是两组哈希：shipment => {：product_ids => [1,3]}和：product_shipments => [：qty_shipped => [32,23]].
为此,请将您的视图代码更改为
<%= hidden_field_tag("product_shipments[][product_id]",product.id) %>
<%= product.product_name %><%= text_field_tag("product_shipments[][qty_shipped]")%>
然后你的控制器动作应该按原样运行.
