Solve race condition using database trigger function

01-Oct-2020 1372
As example, we have a Budget model, which have allocation_cents as the amount allocated for the budget, which can be used to buy the items proposed in the budget.A budget can have many_items, and we need make sure that the sum of the items' price (price_cents) does not exceed the budget's allocation amount (allocation_cents).
Use coupon code:

RUBYONRAILS

to get 30% discount on our bundle!
Prepare for your next tech interview with our comprehensive collection of programming interview guides. Covering JavaScript, Ruby on Rails, React, and Python, these highly-rated books offer thousands of essential questions and answers to boost your interview success. Buy our 'Ultimate Job Interview Preparation eBook Bundle' featuring 2200+ questions across multiple languages. Ultimate Job Interview Preparation eBook Bundle