private async Task CreateRequirements(ExerciseBody exerciseBody, Exercise newExercise)
{
// delete old
await exerciseRepository.DeleteRequirementsAsync(newExercise.Id);
// create new
newExercise.ExerciseRequirements = new List <ExerciseRequirement>();
foreach (string requirement in exerciseBody.Requirements)
{
ExerciseRequirement newRequirement = new ExerciseRequirement
{
Exercise = newExercise,
Requirement = requirement
};
newExercise.ExerciseRequirements.Add(newRequirement);
}
}