What is this movie called?

it wuz like 4 years ago and it started with doves coming out of the trunk of a car and this girl filming it. its about these people who go to a camp or school or something to b magicians an theres a guy whos a warlock and this evil mentor who gives him this red or purple ring to try to kill him... it wus a disney film and stars one of the girls in the band ally and aj