EF Extensions - WhereBulkContains - Filter Included Entities (One-to-many)

CSharp · Console

/Program.cs

// Entity Framework Extensions
// Doc: https://entityframework-extensions.net/where-bulk-contains

// @nuget: Microsoft.EntityFrameworkCore.SqlServer
// @nuget: Z.EntityFramework.Extensions.EFCore

using System.Collections.Generic;

using System.Linq;
using Microsoft.Data.SqlClient;
using Microsoft.EntityFrameworkCore;

public class Program
{
	public static void Main()
	{
		// Doc: https://entityframework-extensions.net/where-bulk-contains
		using (var context = new EntityContext())
		{
			context.Database.EnsureCreated();
			
			// SEED
			context.Orders.Add(new Order() { TotalQuantity = 13, Items = new List<OrderItem>() { new OrderItem() { ProductID = 1, Quantity = 6 }, new OrderItem { ProductID = 2, Quantity = 7 }}});
			context.Orders.Add(new Order() { TotalQuantity = 66, Items = new List<OrderItem>() { new OrderItem() { ProductID = 1, Quantity = 36 }, new OrderItem { ProductID = 3, Quantity = 10 }, new OrderItem { ProductID = 5, Quantity = 20 }}});
			context.Orders.Add(new Order() { TotalQuantity = 99, Items = new List<OrderItem>() { new OrderItem() { ProductID = 1, Quantity = 69 }, new OrderItem { ProductID = 4, Quantity = 20 }, new OrderItem { ProductID = 6, Quantity = 10 }}});
			
			context.SaveChanges();
		}
		
		using (var context = new EntityContext())
		{
			List<int> productIDs = new List<int>() { 1, 6 };
			
			var orders = context.Orders.Include(x => x.Items).WhereBulkContains(x => x.Items, productIDs, x => x.ProductID).ToList();
			
			FiddleHelper.WriteTable(orders);
		}
	}
	
	public class EntityContext : DbContext
	{
		static EntityContext()
		{
			using (var context = new EntityContext())
			{
				context.Database.EnsureCreated();
			}
		}
		
		public DbSet<Order> Orders { get; set; }
		public DbSet<OrderItem> OrderItems { get; set; }

		protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
		{
			optionsBuilder.UseSqlServer(new SqlConnection(FiddleHelper.GetConnectionStringSqlServer()));

			base.OnConfiguring(optionsBuilder);
		}
	}
	
	public class Order
	{
		public int OrderID { get; set; }
		public int TotalQuantity { get; set; }
		public List<OrderItem> Items { get; set; }
	}	
	
	public class OrderItem
	{
		public int OrderItemID { get; set; }
		public int ProductID { get; set; }
		public int Quantity { get; set; }
	}
}