mostalive
463245288a
Add the C# BEFORE situation: a fake-EF DbContext + DbBase that Client/Order inherit, the active-record DbContext back-reference (the dependency leak), navigation fix-up on Client.Orders, and a WebApp that consumes the domain classes directly. Adds an empty After project so the solution shape is final, and an xUnit BeforeTests suite covering the required assertions. - db-subclass-to-dto.sln (classic .sln; SDK 10 defaults to .slnx which breaks run-tests.sh) - src/Before: DbBase, DbContext, Client (+ClientOrders fix-up), Order, WebApp - src/After: empty placeholder (filled in Yak 02) - tests/BeforeAfter.Tests/BeforeTests.cs: 8 tests (7 required + 1 companion)
29 lines
1.2 KiB
C#
29 lines
1.2 KiB
C#
namespace Before;
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/// <summary>
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/// Base class for every DB-backed domain object. Fakes the active-record part
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/// of EF: each entity carries its own <see cref="Id"/> and, once it has been
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/// created/saved through a context, a back-reference to that context.
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///
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/// <see cref="DbContext"/> is the dependency this base class leaks. The
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/// "after" situation (Yak 02) removes this inheritance entirely — domain
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/// objects become plain POCOs that know nothing about a DbContext.
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/// </summary>
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public class DbBase
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{
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/// <summary>
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/// Primary key. Fresh (unsaved) entities have <see cref="Guid.Empty"/>;
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/// <see cref="DbContext.Save"/> assigns a real id, faking EF's identity
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/// generation.
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/// </summary>
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public Guid Id { get; set; }
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/// <summary>
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/// Active-record back-reference: "I know which context created me". This
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/// is the leak the exercise exposes — from a plain domain object you can
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/// reach straight into the persistence layer. <c>internal set</c> because
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/// only the owning <see cref="DbContext"/> may (re)assign it; consumers
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/// (including the WebApp, and the tests) can only read it.
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/// </summary>
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public DbContext? DbContext { get; internal set; }
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} |