How to override model's default attributes using FactoryBot?

Question

I have an Order model with a default attribute status_id whose default value is 1.

I use rspec for testing my rails app. I create an object in a describe block as follows:

let!(:order) { create(:order, status_id: 3) }

When I execute the test, I examine the state of the order object and find that order.status_id is equal to 3, but when I do Order.last.status_id I get 1 instead of 3. If I do Order.all.count I get 1. When I check object ids of order and Order.last they are the same. However, I noticed that their memory location is different.

I wonder why am I seeing this behaviour and how can I fix it so that Order.last.status_id becomes 3 as set in the create statement?

Answer 1

The reason is due to a before_save callback in the Order model. I forgot to check there, but now see that when the callback is called it sets the status_id to the default value based on the value of another attribute.