Aggregate Design: Order aggregate with EF Core owned types on net10.0 - #2249
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Replace the net7.0 sample with the article's follow-along solution: AggregateDesign.Domain (Order aggregate, Result and OrderErrors, IOrderRepository), AggregateDesign.Infrastructure (EF Core 10.0.12 OwnsMany mapping, OrderRepository) and AggregateDesign.Tests (12 domain tests, 3 repository tests on in-memory SQLite, xUnit v3). The item methods now lock once payment starts, quantities are int, and the repository saves tracked changes instead of attaching a mapped copy. Removes AutoMapper, the Npgsql provider with its hard-coded connection string, and the migrations.
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Replaces the whole
csharp-design-patterns/AggregateDesignsample with the follow-along build of the rewritten article. The folder keeps its path, so the article's GitHub link stays valid.Removed:
AggregateDesign.sln,AggregateDesign/(net7.0 class library with separateOrderModel/OrderItemModeldata models, AutoMapper 12.0.1 and AutoMapper.Extensions.Microsoft.DependencyInjection 12.0.0, Npgsql.EntityFrameworkCore.PostgreSQL 7.0.3 with a connection string hard-coded inOnConfiguring(), EF Core and EF Core Design 7.0.3, and three migration files) andTest/(xunit 2.4.2, Microsoft.NET.Test.Sdk 17.3.2, coverlet.collector 3.1.2, and three tests that needed a local Postgres server). AutoMapper 12.0.1 is flagged by GHSA-rvv3-g6hj-g44x (NU1903 on restore); the sample no longer needs a mapping library at all.Added:
AggregateDesign.Domain/: theOrderaggregate root and itsOrderItementity (private setters, private_itemsfield, private constructor plusCreate(TimeProvider)),ResultandOrderErrorsfor broken rules, andIOrderRepository. The item methods lock once payment starts and quantities areint, so the paid amount can never exceed the total on any path.AggregateDesign.Infrastructure/:OrdersDbContextmapping the aggregate directly withOwnsMany(), andOrderRepository(load tracked, change through the root,SaveChangesAsync()).AggregateDesign.Tests/: 12 domain tests and 3 repository tests on in-memory SQLite that read back through a freshDbContext. xUnit v3 with plainAssert, one hand-writtenFixedClock.AggregateDesign.sln(classic format, so CI finds it). No database file is written, so no folder.gitignoreis needed.Packages, re-queried on NuGet on 2026-09-27, the day this PR opened:
Checked locally on SDK 10.0.302, runtime 10.0.10:
dotnet build AggregateDesign.sln -c Release --no-incremental: 0 warnings, 0 errorsdotnet test AggregateDesign.sln --filter "FullyQualifiedName!~Live": 15 of 15 passeddotnet list package --vulnerable --include-transitive: none on all three projectsOnly files under
csharp-design-patterns/AggregateDesign/change.