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PORails 3 Nested Model Form
 

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    <p>I am having some issues with nested models in a form, using Rails 3.1rc4.</p> <p>I presently have models that look like this:</p> <pre><code>class Sale &lt; ActiveRecord::Base attr_accessible :customer_id, :vehicle_id, :sale_date belongs_to :customer accepts_nested_attributes_for :customer end </code></pre> <p>and</p> <pre><code>class Customer &lt; ActiveRecord::Base attr_accessible :dealership_id, :first_name, :last_name, :address1, :email belongs_to :dealership has_many :sales has_many :vehicles, :through =&gt; :sales end </code></pre> <p>I've obviously truncated these slightly, but all the important info is there.</p> <p>I am attempting to set up a sale form that will also allow me to create a new customer, hence the <code>accepts_nested_attributes_for :customer</code> line in the sale model.</p> <p>My form view looks like (again truncated, only the important part):</p> <pre><code> &lt;%= form_for @sale, :html =&gt; {:class =&gt; 'fullform'} do |f| %&gt; &lt;%= f.error_messages %&gt; &lt;%= field_set_tag 'Customer Details' do %&gt; &lt;% f.fields_for :customer do |builder| %&gt; &lt;%= builder.label :first_name %&gt;&lt;br&gt; &lt;%= builder.text_field :first_name %&gt; &lt;% end %&gt; &lt;% end %&gt; &lt;% end %&gt; </code></pre> <p>The problem I am having is that neither the text field nor the label for :first_name are showing up when the form is rendered - there is no error message, it just doesn't appear.</p> <p>I should mention that I have tried both with and without <code>@sale.customer.build</code> in the <code>new</code> method of my controller, but it seems to have had no effect.</p> <p>Thanks!</p> <p>Can anyone suggest what I am doing wrong?</p> <p>EDIT: For the avoidance of doubt, my sales controller's new method looks like:</p> <pre><code>def new @sale = Sale.new @sale.customer.build end </code></pre>
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    1. COOK, i've found some info indicating that instead of `@sale.customer.build` I should have `@sale.build_customer`. I have modified the new method to reflect this, but still to no avail.
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    2. COI've tested out the form for editing a Sale record, rather than creating a new one, and I have found that it works fine - as such, the problem is evidently with creating the empty customer record in the controller. Having tried both `@sale.customer.build` and `@sale.build_customer` with neither working, can anyone suggest what I need to have in the controller?
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