chantellebecker/ecommerce

class Product < ApplicationRecord
    validates :name, presence: true
    validates :quantity, presence: true
    validates :quantity, numericality: { greater_than_or_equal_to: 0 }
    validates :price, format: { with: /\A\d+\.?\d{0,2}\z/ }
    validates :description, presence: true
    validates :email, presence: true, format: { with: /\A[A-Za-z0-9._%+-]+@[A-Za-z0-9\.-]+\.[A-Za-z]+\Z/ }

    has_many :line_items
    before_destroy :ensure_not_referenced_by_any_line_item

    def self.promoted
        where(promoted: true)
    end

    private

    def ensure_not_reference_by_any_line_item
        if line_items.empty?
            return true
        else
            errors.add(:base, 'Line Items present')
            return false
        end
    end
end