Сделал CLientTour вывод, все работает. На -13 минуте видео

project/ProjectTourAgency/Enities/ClientTour.cs

@@ -11,6 +11,8 @@ public class ClientTour
 {
     public int Id { get; private set; }
     public int ClientId { get; private set; }
+
+    public string CLientName { get; private set; } = String.Empty;
     public int TourId { get; private set; }
 
     public int Cost { get; private set; }

project/ProjectTourAgency/Enities/Tour.cs

@@ -1,6 +1,7 @@
 using ProjectTourAgency.Enities.Enums;
 using System;
 using System.Collections.Generic;
+using System.ComponentModel;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
@@ -9,11 +10,34 @@ namespace ProjectTourAgency.Enities;
 
 public class Tour
 {
+
+    [DisplayName("Id Тура")]
     public int Id { get; private set; }
+
+    [Browsable(false)]
     public int EmployeeId { get; private set; }
+
+    [Browsable(false)]
     public int RouteId { get; private set; }
+
+    [DisplayName("Сотрудник")]
+
+    public string EmployeeName { get; private set; } = string.Empty;
+
+    [DisplayName("Маршрут")]
+
+    public string RouteName { get; private set; } = string.Empty;
+
+    [DisplayName("Дата начала тура")]
     public DateTime DepartureDate { get; private set; }
+
+    [Browsable(false)]
     public IEnumerable<ClientTour> ClientTours { get; private set; } = [];
+
+    [DisplayName("Клиенты")]
+    public string Clients => ClientTours != null ?
+        string.Join(",", ClientTours.Select(x => $"{x.CLientName} {x.Cost}")) : string.Empty;
+
     public static Tour CreateEntity(int id, int employeeId, int routeId,
        DateTime date,IEnumerable<ClientTour> clientTours)
     {
@@ -38,4 +62,12 @@ public class Tour
             ClientTours = clientTours
         };
     }
+
+    public void SetClientTours(IEnumerable<ClientTour> clientTours)
+    {
+        if(clientTours != null && clientTours.Any())
+        {
+            ClientTours = clientTours;
+        }
+    }
 }

project/ProjectTourAgency/Implementations/TourRepository.cs

@@ -76,22 +76,53 @@ WHERE Id = @id";
     }
 
 
-    public IEnumerable<Tour> ReadTours()
+    public IEnumerable<Tour> ReadTours(DateTime? dateFrom = null, DateTime? dateTo = null, int? tourId = null, int? clientId = null)
     {
         _logger.LogInformation("Получение всех объектов");
         try
         {
             using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
             var querySelect = @"
-SELECT t.*, ct.TourId, ct.Cost, ct.ClientId FROM Tour t
-INNER JOIN ClientTour ct ON ct.TourId = t.Id";
-            var tour = connection.Query<TempClientTour>(querySelect);
-            _logger.LogDebug("Получение объектов {json}", JsonConvert.SerializeObject(tour));
-            return tour.GroupBy(
-                x => x.Id, y => y,
-                (key, value) => Tour.CreateEntity(value.First(),
-                value.Select(z => ClientTour.CreateEntity(0,z.ClientId, z.Id,z.Cost))
-                )).ToList();
+SELECT
+    t.*,
+    CONCAT(r.Departure,'-', r.Destination) AS RouteName,
+    e.FullName AS EmployeeName, 
+    ct.ClientId,           
+    ct.Cost,                
+    c.FullName AS ClientName
+FROM 
+    Tour t
+LEFT JOIN 
+    Routes r ON r.Id = t.RouteId
+LEFT JOIN 
+    Employees e ON e.Id = t.EmployeeId  -- соединяем с таблицей Employees
+LEFT JOIN 
+    ClientTour ct ON ct.TourId = t.Id   -- соединяем с таблицей ClientTour
+LEFT JOIN 
+    Clients c ON c.Id = ct.ClientId;  
+";
+
+            var clientTourDict = new Dictionary<int, List<ClientTour>>();
+
+            var tours = connection.Query<Tour, ClientTour, Tour>(querySelect,
+                (clientTour, tours) =>
+                {
+                    if (!clientTourDict.TryGetValue(clientTour.Id, out var ct))
+                    {
+                        ct = [];
+                        clientTourDict.Add(clientTour.Id, ct);
+                    }
+                    ct.Add(tours);
+                    return clientTour;
+                }, splitOn: "ClientId", param: new { dateFrom, dateTo, tourId, clientId });
+            _logger.LogDebug("Полученные объекты: {json}", JsonConvert.SerializeObject(tours));
+
+            return clientTourDict.Select(x =>
+            {
+                var t = tours.First(y => y.Id == x.Key);
+                t.SetClientTours(x.Value);
+                return t;
+            }).ToArray();
         }
         catch (Exception ex)
         {

project/ProjectTourAgency/Repositories/ITourRepositiry.cs

@@ -9,7 +9,7 @@ namespace ProjectTourAgency.Repositories;
 
 public interface ITourRepository
 {
-    IEnumerable<Tour> ReadTours();
+    IEnumerable<Tour> ReadTours(DateTime? dateFrom = null, DateTime? dateTo = null, int? tourId = null, int? clientId = null);
 
 
     void CreateTour(Tour tour);