Question

My model has a few counters on it, and I want to increment/decrement these counters, and they should be done in a transaction.

So for example, the User model has sales_count, friend_count.

Now I want to modify both of them in a transaction:

user.sales_count += 1
user.friend_count += 3
user.save

How can I do this in a transaction?

I know there is increment_counter, but that seems to be for only a single attribute and I can’t figure out how to add 2 or subtract 2 instead of just 1.

Answer 1

you could use update_counters

User.update_counters(user_id, :sales_count => 1, :friend_count => 3, :other_count => -2)