public virtual async Task <double> SetRatingAsync(Guid entityId, string userId, int rating)
{
var existingRating = await RatingsSource.FirstOrDefaultAsync(link => link.UserId == userId && link.EntityId == entityId);
if (existingRating == null)
{
var newRating = new LinkRatingEntity <T> {
UserId = userId, Rating = rating, EntityId = entityId
};
AddAndSaveRating(newRating);
}
else
{
existingRating.Rating = rating;
await context.SaveChangesAsync();
}
return(await RecalcRatingsAsync(entityId));
}
protected void AddAndSaveRating(LinkRatingEntity <T> newRating)
{
context.Add(newRating);
context.SaveChanges();
}
