Dapper multi object query One-Many - dapper

Question

Not really sure why I'm not getting the child object populated.
My tables:
Product:
[ProductId]
,[Brand]
,[Model]
StoreProduct:
[StoreId]
,[ProductId]
,[StoreProductId]
Class
public class Product
{
public Guid ProductId { get; set; }
public string Brand { get; set; }
public string Model { get; set; }
public virtual List<StoreProduct> StoreProducts { get; set; }
}
public class StoreProduct
{
public int StoreId { get; set; } //Key 0
public Guid ProductId { get; set; } //Key 1
public Store Store { get; set; }
public Product Product { get; set; }
public string StoreProductId { get; set; } //A new Id specific for each store
}
My Dapper Code
string sql = "SELECT * FROM StoreProduct AS A INNER JOIN Product AS B ON A.ProductId = B.ProductId WHERE A.StoreProductId = #StoreProductId and A.StoreId = #StoreId";
var connection = AppDbContext.Database.GetDbConnection();
return connection.Query<StoreProduct, Product, Product>(
sql,
(StoreProduct, Product) => { StoreProduct.ProductId = Product.ProductId; return Product; },
new { StoreProductId = storeProductId, StoreId = StoreID }, splitOn: "ProductId")
.FirstOrDefault();
What the DB returns:
But... StoreProducts List is null.

Answer 1

Use Dapper the way it works.
var listProduct = new Dictionary<string, Product>();
var listStoreProduct = new Dictionary<string, StoreProduct>();
using var connection = _connectionProvider.GetConnection();
var query = "SELECT * FROM StoreProduct AS A INNER JOIN Product AS B ON A.ProductId = B.ProductId WHERE A.StoreProductId = #StoreProductId and A.StoreId = #StoreId";
var result = connection.Query<Product, StoreProduct, Product>(query, (product, storeProduct) =>
{
if (!listProduct.TryGetValue(product.Id, out var entry))
{
entry = product;
listProduct.Add(entry.Id, entry);
}
if (storeProduct != null && !listStoreProduct.TryGetValue(storeProduct.Id, out var procInstance))
{
listStoreProduct.Add(procInstance.Id, procInstance);
entry.ProcessInstance.Add(procInstance);
}
return entry;
}, splitOn: "ProductId").Distinct().ToList();
I hope I could have helped you.