Receipts

Receipts for your Rails application that works with any payment provider.

Installation

Add this line to your application's Gemfile:

gem 'receipts'

And then execute:

$ bundle

Or install it yourself as:

$ gem install receipts

Usage

Adding receipts to your application is pretty simple. All you need is a model that stores your transaction details. In this example our application has a model named Charge that we will use.

We're going to add a method called receipt on our model called Charge that will create a new receipt for the charge using attributes from the model.

# == Schema Information
#
# Table name: charges
#
#  id             :integer          not null, primary key
#  user_id        :integer
#  stripe_id      :string(255)
#  amount         :integer
#  card_last4     :string(255)
#  card_type      :string(255)
#  card_exp_month :integer
#  card_exp_year  :integer
#  uuid           :string
#  created_at     :datetime
#  updated_at     :datetime
#

class Charge < ActiveRecord::Base
  belongs_to :user
  validates :stripe_id, uniqueness: true

  def receipt
    Receipts::Receipt.new(
      id: id,
      product: "GoRails",
      company: {
        name: "One Month, Inc.",
        address: "37 Great Jones\nFloor 2\nNew York City, NY 10012",
        email: "teachers@onemonth.com",
        logo: Rails.root.join("app/assets/images/one-month-dark.png")
      },
      line_items: [
        ["Date",           created_at.to_s],
        ["Account Billed", "#{user.name} (#{user.email})"],
        ["Product",        "GoRails"],
        ["Amount",         "$#{amount / 100}.00"],
        ["Charged to",     "#{card_type} (**** **** **** #{card_last4})"],
        ["Transaction ID", uuid]
      ],
      font: {
        bold: Rails.root.join('app/assets/fonts/tradegothic/TradeGothic-Bold.ttf'),
        normal: Rails.root.join('app/assets/fonts/tradegothic/TradeGothic.ttf'),
      }
    )
  end
end

Update the options for the receipt according to the data you want to display.

Customizing Your Receipts

id - Required

This sets the ID of the charge on the receipt

product or message - Required

You can set either the product or message options. If you set product, it will use the default message. If you want a custom message, you can set the message option to populate it with custom text.

company - Required

Company consists of several required nested attributes.

name - Required
address - Required
email - Required
logo - Required
line_items - Required

You can set as many line items on the receipts as you want. Just pass in an array with each item containing a name and a value to display on the receipt.

font - Optional

If you'd like to use your own custom font, you can pass in the file paths to the normal and bold variations of your font. The bold font variation is required because it is used in the default message. If you wish to override that, you can pass in your own custom message instead.

Rendering the Receipt PDF in your Controller

Here we have a charges controller that responds to the show action. When you visit it with the PDF format, it calls the receipt method that we just created on the Charge model.

We set the filename to be the date plus the product name. You can customize the filename to your liking.

Next we set the response type which will be application/pdf

Optionally we can set the disposition to :inline which allows us to render the PDF in the browser without forcing the download. If you delete this option or change it to :attachment then the receipt will be downloaded instead.

class ChargesController < ApplicationController
  before_action :authenticate_user!
  before_action :set_charge

  def show
    respond_to do |format|
      format.pdf {
        send_data @charge.receipt.render,
          filename: "#{@charge.created_at.strftime("%Y-%m-%d")}-gorails-receipt.pdf",
          type: "application/pdf",
          disposition: :inline
      }
    end
  end

  private

    def set_charge
      @charge = current_user.charges.find(params[:id])
    end
end

And that's it! Just create a link_to to your charge with the format of pdf and you're good to go.

For example:

# config/routes.rb
resources :charges

<%= link_to "Download Receipt", charge_path(@charge, format: :pdf) %>

Contributing