gistfile1.rb

if stock = @account.stocks.find_by_name(stock.pretty_symbol)
    if stock.price == price.cents
        stock.amount += amount
    else
        @account.stocks << Stock.new(name: stock.pretty_symbol, price: price.cents, amount: amount)
    end
else
    @account.stocks << Stock.new(name: stock.pretty_symbol, price: price.cents, amount: amount)
end
@account.save