close issue RailsApps#17, handle 'card declined' errors

app/helpers/devise_helper.rb

@@ -0,0 +1,16 @@
+module DeviseHelper
+  def devise_error_messages!
+    return '' if resource.errors.empty?
+    messages = resource.errors.full_messages.map { |msg| content_tag(:p, msg) }.join
+    sentence = I18n.t('errors.messages.not_saved',
+      count: resource.errors.count,
+      resource: resource.class.model_name.human.downcase)
+    html = <<-HTML
+    <div class="alert alert-error alert-block">
+      <button type="button" class="close" data-dismiss="alert">&#215;</button>
+      #{messages}
+    </div>
+    HTML
+    html.html_safe
+  end
+end

app/models/user.rb

@@ -46,9 +46,9 @@ def update_stripe
     self.customer_id = customer.id
     self.stripe_token = nil
   rescue Stripe::StripeError => e
-    logger.error e.message
-    errors.add :base, "Unable to create your subscription. #{e.message}"
-    stripe_token = nil
+    logger.error "Stripe Error: " + e.message
+    errors.add :base, "Unable to create your subscription. #{e.message}."
+    self.stripe_token = nil
     false
   end
 
@@ -60,8 +60,8 @@ def cancel_subscription
       end
     end
   rescue Stripe::StripeError => e
-    logger.error e.message
-    errors.add :base, "Unable to cancel your subscription. #{e.message}"
+    logger.error "Stripe Error: " + e.message
+    errors.add :base, "Unable to cancel your subscription. #{e.message}."
     false
   end
 

app/views/devise/registrations/edit.html.erb

@@ -2,6 +2,7 @@
 <div id="stripe_error" class="alert alert-error" style="display:none" ></div>
 <%= simple_form_for(resource, :as => resource_name, :url => registration_path(resource_name), :html => { :method => :put, :class => 'form-vertical' }) do |f| %>
   <%= f.error_notification %>
+  <%= devise_error_messages! %>
   <%= f.input :name, :autofocus => true %>
   <%= f.input :email, :required => true %>
   <%= f.input :password, :autocomplete => "off", :hint => "leave it blank if you don't want to change it", :required => false %>

app/views/devise/registrations/new.html.erb

@@ -5,6 +5,7 @@
   <h3><%= params[:plan].titleize if params[:plan] %> Subscription Plan</h3>
   <%= hidden_field_tag 'plan', params[:plan] %>
   <%= f.error_notification %>
+  <%= devise_error_messages! %>
   <%= f.input :name, :autofocus => true %> 
   <%= f.input :email, :required => true %>
   <%= f.input :password, :required => true %>