Create product and price on stripe using ruby on rails

image take form

here is how you can configure stripe in rails

Step 1:
create packages table

class CreatePackages < ActiveRecord::Migration[7.0]
  def change
    create_table :packages do |t|
      t.string :name, default: ""
      t.integer :price, default: 0
      t.string :stripe_product_id
      t.string :stripe_price_id
      t.boolean :status, default: true

      t.timestamps
    end
  end
end

Step 2:
we will create stripe product on after_create callback in package controller

class Package < ApplicationRecord
  has_one_attached :avatar

  validates :name, :price, presence: true
  validates :avatar, content_type: { in: %w[image/png image/jpg image/jpeg image/webp], message: 'has not a valid image type' }

  after_create :create_stripe_product
  before_update :update_stripe_product

  def update_stripe_product
    if self.stripe_product_id.present?
      if self.price != price_was
        response = Stripe::Price.create(product: self.stripe_product_id, unit_amount: self.price*100, currency: 'usd')

        Stripe::Product.update(self.stripe_product_id, {default_price: response["id"]})
        Stripe::Price.update(self.stripe_price_id, {active: false}) #archive previous price
        self.stripe_price_id = response["id"]
      end

      if self.name != name_was
        images_array = self.avatar.present? ? [Rails.application.routes.url_helpers.rails_blob_url(self.avatar)] : [""]
        Stripe::Product.update(self.stripe_product_id, { name: name, images: images_array })
      end

      Stripe::Product.update(self.stripe_product_id, { active: self.status }) if  self.status != status_was
    end
  end


  def create_stripe_product
    image_link = self.avatar.present? ? [Rails.application.routes.url_helpers.rails_blob_url(self.avatar)] : [""]
    response = Stripe::Product.create({
                                        name: self.name,
                                        images: image_link,
                                        description: self.id,
                                        default_price_data: {
                                          unit_amount: (self.price)*100,
                                          currency: 'usd'
                                        }
                                      })
    self.update(stripe_product_id: response["id"], stripe_price_id: response["default_price"])
  end
end

create_stripe_product callback will create product and a default price for that product (due to default_price_data attribute in product.create ) on stripe.

Edit product price
here is a little problem we can not edit stripe product, stripe not allow to edit price. So instead of edit price we will create new price and assign it to the specific product. like we did in update_stripe_product in after_update call back in this block

if self.price != price_was
        response = Stripe::Price.create(product: self.stripe_product_id, unit_amount: self.price*100, currency: 'usd')

        Stripe::Product.update(self.stripe_product_id, {default_price: response["id"]})
        Stripe::Price.update(self.stripe_price_id, {active: false}) #archive previous price
        self.stripe_price_id = response["id"]
      end

here what we are doing is we are creating new price and add it in the specific product after that we archive the default price of the product that was already assign to the product by making active: false and then replace the stripe_price_id with the new price id in our local database to access it in future