Question

on before_create, before_update, before_destroy methods, I would like to do an if: on multiple constraints, such as

before_destroy :lock_quantity, if: [:processed, :quantity_changed]

so that if it’s been processed, the quantity cant change

(just in case:)

def lock_quantity
  errors.add :quantity, "You must revert the row before changing quantity"
end

so, is it possible to have multiple conditions for if:
?

Answer 1

So, this should actually be like this…

before_update :lock_quantity, if: [:processed, :quantity_changed?]

Notice the question mark!

(just in case:)

def lock_quantity
  errors.add :quantity, "You must revert the row before changing quantity"
  false
end

pass false to stop saving