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POTest Failure: ActionView::Template::Error: undefined method `title' for nil:NilClass
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copied!<p>This is in my _line_items.text.erb file:</p> <pre><code><%= sprintf("%2d x %s", line_item.quantity, truncate(line_item.product.title, length: 50)) %> </code></pre> <p>orders.yml</p> <pre><code>one: name: Dave Thomas address: MyText email: dave@example.org pay_type: Check </code></pre> <p>line_items.yml</p> <pre><code>one: product: ruby cart_id: 1 order: one two: product_id: 1 cart_id: 1 order: one </code></pre> <p>products.yml</p> <pre><code>ruby: title: Programming Ruby 1.9 description: Ruby is the fastest growing and most exciting dynamic language out there. If you need to get working programsdelivered fast, you should add Ruby to your toolbox. price: 49.50 image_url: ruby.png </code></pre> <p>This all seems to be correct.</p> <p>Here is the actual test:</p> <pre><code>class OrderNotifierTest < ActionMailer::TestCase test "received" do mail = OrderNotifier.received(orders(:one)) assert_equal "Pragmatic Store Order Confirmation", mail.subject assert_equal ["dave@example.org"], mail.to assert_equal ["depot@example.com"], mail.from assert_match /1 x Programming Ruby 1.9/, mail.body.encoded end </code></pre> <p>Any ideas on where else to look for the <code>ActionView::Template::Error: undefined method 'title' for nil:NilClass</code> error?</p> <p>Update:</p> <pre><code>class LineItem < ActiveRecord::Base attr_accessible :cart_id, :product_id, :quantity, :order_id, :product, :cart, :price belongs_to :order belongs_to :cart belongs_to :product def total_price self.price * self.quantity end end </code></pre>

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