Fixed DM.get error

app.rb

@@ -100,7 +100,7 @@ end
 
 get '/services/:slug/payments' do
   @service = Service.first(:slug => params[:slug])
-  @payments = Payment.all(:service => @service, :amount.gte => 0, :order => 'd')
+  @payments = Payment.all(:service => @service, :amount.gte => 0, :order => [ 'd' ])
   @total = @payments.sum(:amount)
   haml :servicepayments
 end
@@ -111,7 +111,7 @@ get '/services/:slug/paymentsdetail' do
   if params[:min].to_i > 0
     min = params[:min].to_i
   end
-  @payments = Payment.all(:service => @service, :amount.gte => min, :order => 'd')
+  @payments = Payment.all(:service => @service, :amount.gte => min, :order => [ 'd' ])
   @total = @payments.sum(:amount)
   haml :servicepaymentsdetail, :layout => false
 end