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POerrors(:base) << message leads undefined method `map' for nil:NilClass
 

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    <p>I am trying to integrate ActiveMerchant into my website using Rails 3.2. Currently I have code to do general validation on a credit card using the ActiveMerchant "valid" function, which returns some error message if the card i not valid. If there are errors then I would like to add them to errors and re-render the view to display the view with the errors. Below is the code in my controller.</p> <p><strong>First I create a credit card</strong></p> <pre><code>def credit_card first_name = User.find(user_id).first_name last_name = User.find(user_id).last_name @credit_card ||= ActiveMerchant::Billing::CreditCard.new( :brand =&gt; card_type, :number =&gt; card_number, :verification_value =&gt; card_verification, :month =&gt; card_expiration.month, :year =&gt; card_expiration.year, :first_name =&gt; first_name, :last_name =&gt; last_name ) end </code></pre> <p><strong>Next I validate the card and try to add errors returned to the base errors for views</strong></p> <pre><code># Active Merchant Credit Card validation def validate_card unless credit_card.valid? credit_card.errors.full_messages.each do |message| errors[:base] &lt;&lt; message end end end </code></pre> <p><strong>Finally I call valid_card on the create</strong></p> <pre><code>validate :validate_card, :on =&gt; :create </code></pre> <p><strong>However I am getting the error below</strong></p> <blockquote> <p>NoMethodError in Orders#create</p> <p>Showing app/views/orders/_form.html.erb where line #18 raised:</p> <p>undefined method `map' for nil:NilClass Extracted source (around line</p> <h1>18):</h1> <p>15: 16: 17: &lt;%= f.label :print_dimension %><br /> 18: &lt;%= f.collection_select :print_dimension_id, @print_dimensions, :id, :dimension %> 19: 20: 21: &lt;%= f.label :delivery_option_id %><br /></p> </blockquote> <p>Please let me know if you have any suggestions. Thank you</p>
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