/// <summary>
/// Get a list of all users and their ratings on every article
/// </summary>
public UserProductRatingsTable GetUserProductRatingsTable(IRater rater)
{
UserProductRatingsTable table = new UserProductRatingsTable();
table.UserIndexToID = db.Users.OrderBy(x => x.Id)
.Select(x => x.Id).Distinct().ToList();
table.ProductIndexToID = db.Products.OrderBy(x => x.Id)
.Select(x => x.Id).Distinct().ToList();
foreach (ObjectId userId in table.UserIndexToID)
{
table.Users.Add(new UserProductRatings(userId, table.ProductIndexToID.Count));
}
var userProductRatingGroup = db.UserActions
.GroupBy(x => new { x.UserID, x.ProductID })
.Select(g => new { g.Key.UserID, g.Key.ProductID, Rating = rater.GetRating(g.ToList()) })
.ToList();
foreach (var userAction in userProductRatingGroup)
{
int userIndex = table.UserIndexToID.IndexOf(userAction.UserID);
int productIndex = table.ProductIndexToID.IndexOf(userAction.ProductID);
table.Users[userIndex].ProductRatings[productIndex] = userAction.Rating;
}
return(table);
}
public void Train(UserBehaviorDatabase db)
{
UserBehaviorTransformer ubt = new UserBehaviorTransformer(db);
ratings = ubt.GetUserProductRatingsTable(rater);
List <ProductCategoryCount> productCategories = ubt.GetProductCategoryCounts();
ratings.AppendProductFeatures(productCategories);
FillTransposedRatings();
}
public void Train(UserBehaviorDatabase db)
{
UserBehaviorTransformer ubt = new UserBehaviorTransformer(db);
ratings = ubt.GetUserProductRatingsTable(rater);
}
