Validate Before Destroy

Question

I have three classes: School, Account, and Administratorship.

School

Answer 1

For Rails 5, returningfalse won't halt the callback chain. You need to use throw(:abort)

belongs_to :account belongs_to :school

before_destroy :confirm_presence_of_alternate_administratorship_in_school

protected

def confirm_presence_of_alternate_administratorship_in_school
    unless school.administrators.count(["administratorships.account_id != #{id}"]) > 0
        errors.add_to_base "The school must have at least one administrator"
        throw(:abort)
    end
end