ruby on rails - display braintree errors on fail -

hi trying braintree account display errors when creating transaction doesn't appear working

- flash.each |key, value|               %div{:class => "alert alert-#{key}"}= value   def update     result = braintree::transaction.sale(         :amount => params[:amount_to_add].to_f,         # :order_id => "order id",         :customer_id => customer.customer_cim_id,         :tax_amount => (params[:amount_to_add].to_f / 11).round(2),         :options => {             :submit_for_settlement => true         }      )     if result.success?       logger.info "added #{params[:amount_to_add].to_f} #{customer.first_name} #{customer.last_name} (#{customer.customer_cim_id})"       customer.store_credit.add_credit(params[:amount_to_add].to_f)       redirect_to myaccount_store_credit_path       # , :notice => "successfully updated store credit."     else       result.errors.each |error|         puts error.message         customer.errors.add(:base, error.message)         render :show, :notice => error.message       end     end   end 

i believe reason you're unable see errors because of :notice option on render method, redundant because render doesn't seem using :notice option, redirect_to. may add errors your flash, note in view have loop through errors within flash render it.

another way think though add payment method user model

class user|customer    ...     def process_braintree_payment(amount)      result = braintree::transaction.sale(         :amount => amount.to_f,         # :order_id => "order id",         :customer_id => customer_cim_id,         :tax_amount => (amount.to_f / 11).round(2),         :options => {             :submit_for_settlement => true         }     )     add_braintree_errors(result.error) unless result.success?    end     def add_braintree_errors(error_object)      error_object.each |error|        errors.add(:braintree, error.message)      end    end end  class xcontroller   def update     @customer.process_braintree_payment(params[:amount_to_add])     if @customer.errors.empty?       logger.info "added #{params[:amount_to_add].to_f} #{@customer.first_name} #{@customer.last_name} (#{@customer.customer_cim_id})"       @customer.store_credit.add_credit(params[:amount_to_add].to_f)       redirect_to myaccount_store_credit_path       # , :notice => "successfully updated store credit."     else       render :show     end   end end 

in view, have access @customer variable or better store error object in actioncontroller#flash, note however, using same keys flash messages, overwrite previous value.