back/Contracts/DTOs/SpendingGroupDto.cs

@@ -5,4 +5,5 @@ public class SpendingGroupDto
     public Guid Id { get; set; }
     public string Name { get; set; } = string.Empty;
     public Guid UserId { get; set; }
+    public List<ChangeRecordDto> ChangeRecords { get; set; } = new();
 }

back/Infrastructure/Models/Changerecord.cs

@@ -12,7 +12,7 @@ public class ChangeRecord
     public User User { get; set; } = null!;
     
     public Guid SpendingGroupId { get; set; }
-    public SpendingGroup SpendingGroup { get; set; } = null!;
+    public SpendingGroup? SpendingGroup { get; set; }
 
     public void Update(ChangeRecordDto changeRecordDto)
     {

back/Infrastructure/Models/SpendingGroup.cs

@@ -7,4 +7,5 @@ public class SpendingGroup
 
     public Guid UserId { get; set; }
     public User User { get; set; } = null!;
+    public List<ChangeRecord> ChangeRecords { get; set; } = new();
 }

back/Infrastructure/Models/User.cs

@@ -10,6 +10,7 @@ public class User
     public string Password { get; set; } = null!;
     public decimal Balance { get; set; }
     public List<SpendingGroup>? SpendingGroups { get; set; }
+    public List<ChangeRecord>? ChangeRecords { get; set; }
 
     public void Update(UserDto userDto)
     {

back/Infrastructure/Repositories/SpendingGroupRepo.cs

@@ -46,6 +46,7 @@ public class SpendingGroupRepo : ISpendingGroupRepo
         using var context = _factory.CreateDbContext();
 
         var group = await context.SpendingGroups
+            .Include(x => x.ChangeRecords)
             .FirstOrDefaultAsync(x => x.Id == search.Id
                 || x.Name == search.Name);
 
@@ -71,7 +72,7 @@ public class SpendingGroupRepo : ISpendingGroupRepo
             }
         }
 
-        return await query.Select(x => x.ToDto()).ToListAsync();
+        return await query.Include(x => x.ChangeRecords).Select(x => x.ToDto()).ToListAsync();
     }
 
     public async Task<SpendingGroupDto?> Update(SpendingGroupDto spendingGroup)

back/Infrastructure/Support/Mappers/SpendingGroupMapper.cs

@@ -10,7 +10,8 @@ public static class SpendingGroupMapper
         {
             Id = group.Id,
             Name = group.Name,
-            UserId = group.UserId
+            UserId = group.UserId,
+            ChangeRecords = group.ChangeRecords.Select(x => x.ToDto()).ToList()
         };
     public static SpendingGroup ToModel(this SpendingGroupDto group) 
         => new()