scope gate example

scope_gate.rb

    class_eval do
      {
        :total_npm      => [BucketContribution::Type::NON_PAYABLE_MARKETING,  TransactionType::MANUAL_CREDIT_TO_NON_PAYABLE_MARKETING],
        :total_pm       => [BucketContribution::Type::PAYABLE_MARKETING,      TransactionType::MANUAL_CREDIT_TO_PAYABLE_MARKETING],
        :total_deposits => [BucketContribution::Type::DEPOSIT,                TransactionType::MANUAL_CREDIT_TO_DEPOSIT],
        :total_earnings => [BucketContribution::Type::SERVICES_EARNED,        TransactionType::MANUAL_CREDIT_SERVICES_EARNED]

      }.each do |name, i|
        define_method "#{name}=" do |amount|
          BucketContribution.delete_all(["user_id = ? AND bucket_type = ?", self.id, i[0] ])
          user_transaction = UserTransaction.new({
            :user_id          => self.id,
            :amount           => amount,
            :transaction_type => i[1],
            :domain_id        => self.domain_id
          })
          commerce_engine = CommerceEngine.new(self.domain)
          commerce_engine.process(user_transaction)
        end

        define_method name do
          self.get_balance(i[0]).to_f
        end
      end
    end