Ruby on Rails 将 id 传递给新的创建表单 [英] Ruby on Rails pass id to new create form

问题描述

好的，我已经搜索了高低，阅读了教程，观看了视频，但我仍然没有找到任何地方.我在这里读过类似的问题，但问题更复杂或缺乏答案 - 所以这里......

Ok, I've searched high and low, read tutorials, watched videos and I am still not getting any where with this. I've read similar questions here, but questions were more complex or lacked answers - so here goes...

我有帐户和发票模型.在显示帐户时，我想要一个指向与该帐户相关的创建新发票"的链接.(后来我实际上希望在创建发票时有一个选择字段来选择一个帐户，但我会把它留给另一个痛苦.

I have models Account and Invoice. When showing an Account, I'd like a link to 'Create new invoice' which relates to that account. (Later I'd actually like a select field to choose an Account when creating an Invoice, but I'll leave that to another excruciation).

这是我的模型...帐户:

Here are my models... Account:

class Account < ActiveRecord::Base
  attr_accessible :name, :invoice 
  attr_accessible :name, :invoice
  has_many :invoices
end

和发票:

class Invoice < ActiveRecord::Base
  belongs_to :account
  attr_accessible :amount_pretax, :amount_total, :date_sent, :project, :status, :tax, :account, :account_id
end

现在，在我的/views/accounts/show.html.erb

Now, in my /views/accounts/show.html.erb

<p id="notice"><%= notice %></p>
<p>
  <b>Name:</b>
  <%= @account.name %>
</p>
<%= link_to 'New Invoice', new_invoice_path(:account_id=>@account.id) %>
<%= link_to 'Edit', edit_account_path(@account) %> |
<%= link_to 'Back', accounts_path %>

所以，发生的事情是，当我单击新发票"链接时，它会显示新表单，帐户字段填充有以下奇怪的文本:#<Account:0x10fe16bc0> 然后当我提交表单时出现此错误:ActiveRecord::InvoicesController#create 中的AssociationTypeMismatch用这个语句:Account(#2281084000) expected, got String(#2267210740)伴随着这个:

So, what's happening is, when I click on the New Invoice link it shows the new form, with the account field populated with this weird text: #<Account:0x10fe16bc0> and then when I submit the form I get this error: ActiveRecord::AssociationTypeMismatch in InvoicesController#create with this statement: Account(#2281084000) expected, got String(#2267210740) along with this:

app/controllers/invoices_controller.rb:45:in `new'
app/controllers/invoices_controller.rb:45:in `create'

这是发票控制器中的内容:

This is what is in the Invoices Controller:

def new
  @invoice = Invoice.new(:account_id => params[:account_id])
  respond_to do |format|
  format.html # new.html.erb
  format.json { render :json => @invoice }
  end
end

def create
  @invoice = Invoice.new(params[:invoice])
   ....
end

以上是我认为我出错的地方，但目前我无法将这些台词放在哪里.我完全是一个初学者，解决此功能的任何帮助肯定会教我​​负担.

The above is where I think I'm going wrong, but what to put this those lines is beyond me at the moment. I'm totally a beginner, any help to solve this functionality will surely teach me loads.

感谢您的时间.

推荐答案

当您单击 /views/accounts/show 页面上的 New invoice 链接时，我想您希望您的新发票属于该帐户.

When you click the New invoice link on the /views/accounts/show page, I suppose that you want that your new invoice belongs to this account.

因此在您的表单中，您不必让用户选择帐户.例如，您可以用 hidden_​​field 替换相应的字段:

So in your form, you don't have to let the user choose an account. You can for example replace the corresponding field by a hidden_field:

<%= f.hidden_field :account_id, :value => params[:account_id] %>

同样在控制器的 new 操作中，将 @invoice = Invoice.new(:account_id => params[:account_id]) 替换为 @发票 = Invoice.new

Also in the new action of your controller, replace @invoice = Invoice.new(:account_id => params[:account_id]) by @invoice = Invoice.new

希望这会有所帮助.

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