public ActionResult AddChannelReview(int id, [FromBody] Review review)
{
var user = review.User;
_context.Users.Add(user);
_context.SaveChanges();
review.User = user; // UserID added with autoincrement
var channel = _context.Channels.Single(channel => channel.ChannelID == review.ChannelID);
channel.RatingAverage = (channel.RatingAverage * channel.ReviewCount + review.Rating) / (channel.ReviewCount + 1);
channel.ReviewCount++;
_context.Reviews.Add(review);
_context.SaveChanges();
_cache.AddReview(_context.Reviews.Include(review => review.Channel).Include(review => review.User).Single(r => r.ReviewID == review.ReviewID));
return(CreatedAtAction("AddChannelReview", new { Id = review.ReviewID }, review));
}