Choisces are not working

[salehsed]

I have the following model but the admin throws exception

'''
/**
* @odm\String
* @Assert\Choice(callback = "getChoiceRoles")
*/
protected $role;

public static function getChoiceRoles()
{
return array( "choice1", "choice2" );
}

'''

Error:

'''

Expected argument of type "array or \Closure", "NULL" given
500 Internal Server Error - UnexpectedTypeException

'''

[salehsed]

any update ?

[richsage]

Can you please provide a backtrace from the exception report?