Rails mailer view template pass value send by a form

Question

Its my first attempt to use the rails mailer to send email. I however is able to send plain emails but when I tried to pass the logged in user (current_user) name and params values send by the form I am getting the error. Undefined method 'params'.

payment_mailer.rb

class PaymentMailer < ApplicationMailer
    def success(user)
        mail(to: "#{user.first_name} #{user.last_name} <#{user.email}>", subject: "Payment Successful")
    end
end

success.html.erb

<div class = "col-sm-12">
          <h1>Payment Successful</h1>
          <p>Dear <%= user.first_name %>, Thank you for being a part of our system<br>
            Your invoice (#<%= params[:id] %>) has been generated.
          </p>
        </div>
        <div class = "clearfix"></div>
        <div class = "col-sm-6">
          <table class = "table">
            <thead>
              <tr>
                <th>Paid Ammount</th>
                <th>Card Transaction Fee (2.9% + 0.30)</th>
                <th>Credited Ammount</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>&euro;<%= params[:amount] %></td>
                <td></td>
                <td></td>
              </tr>
            </tbody>
            <h3>Total credited amount in your Account is: </h3>
          </table>
        </div>
        <div class = "clearfix"></div>
      </div>

payment_controller.rb

amount = params[:amount]
@user = current_user
netamt =  (amount.to_f - ((amount.to_f*2.9)/100 + 0.30))
payment = @user.payments.create(:amount => netamt, :method => "Card", :txn_code => params[:stripeToken])
@user.update_attribute(:balance, @user.balance+netamt)
PaymentMailer.success(current_user).deliver_now

Please guide me.

Answer 1

Just change in your payment controller after the payment, do like that

PaymentMailer.success(payment).deliver_now

And in your mailer do

class PaymentMailer < ApplicationMailer
  def success(payment)
    @payment = payment
    @user = payment.user
    mail(to: "#{@user.first_name} #{@user.last_name} <#{@user.email}>", subject: "Payment Successful")
  end
end

and in your mailer template use

@payment.id #for payment id

@payment.amount #for amount

@user.first_name #for user name