As a user, I want to keep track of what I spend on my car.
Steps:
create expenses table in accordance with our db schema (the amount field should be not null).
the amount field should be in cents (use money gem)
create Expense model
to the model, add active record validation that would validate numericality of the amount field
You don't need to add anything to UI, that will be a part of another task.
As a user, I want to keep track of what I spend on my car.
Steps: