A:增加数据库配置和使用
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using Microsoft.EntityFrameworkCore;
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using Sharp.Data;
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using Sharp.Data.Context;
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namespace Data.Test;
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/// <summary>
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/// 演示 04: 软删除功能
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///
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/// 本测试类演示:
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/// 1. 什么是软删除
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/// 2. 如何启用软删除
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/// 3. 软删除 vs 物理删除
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/// 4. 查询时自动过滤已删除数据
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/// 5. 如何查询已删除的数据
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/// </summary>
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[TestClass]
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public class _04_SoftDeleteTests
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{
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/// <summary>
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/// 演示: 软删除基础概念
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///
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/// 软删除（Soft Delete）不会真正从数据库删除记录，
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/// 而是将 IsDeleted 标记设置为 true
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/// </summary>
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[TestMethod]
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public async Task Demo_SoftDeleteBasics()
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{
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var builder = new DataContextBuilder<TestDbContext>();
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builder.UseInMemoryDatabase($"SoftDeleteDemo_{Guid.NewGuid()}")
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.UseAudit(true)
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.UseSoftDelete(true) // 启用软删除
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.UseCurrentUser("admin");
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using var db = builder.Build();
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var repo = db.Repository<Product>();
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// 创建产品
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var product = new Product
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{
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Name = "要删除的产品",
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Price = 100m,
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Stock = 10
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};
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await repo.AddAsync(product);
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await db.SaveChangesAsync();
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Console.WriteLine($"✓ 创建产品: {product.Name}");
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Console.WriteLine($" IsDeleted: {product.IsDeleted}");
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var productId = product.Id;
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// 软删除产品
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await repo.RemoveAsync(productId);
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await db.SaveChangesAsync();
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Console.WriteLine($"\n✓ 软删除后:");
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Console.WriteLine($" IsDeleted: {product.IsDeleted}");
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Console.WriteLine($" DeletedAt: {product.DeletedAt:yyyy-MM-dd HH:mm:ss}");
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Console.WriteLine($" DeletedBy: {product.DeletedBy}");
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// 验证
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Assert.IsTrue(product.IsDeleted);
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Assert.IsNotNull(product.DeletedAt);
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Assert.AreEqual("admin", product.DeletedBy);
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// 正常查询看不到已删除的数据
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var found = await repo.GetByIdAsync(productId);
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Assert.IsNull(found);
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Console.WriteLine($"\n✓ 正常查询返回 null (数据被过滤)");
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// 但数据仍在数据库中
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var allIncludingDeleted = await db.Context.Set<Product>()
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.IgnoreQueryFilters() // 忽略软删除过滤器
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.Where(p => p.Id == productId)
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.FirstOrDefaultAsync();
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Assert.IsNotNull(allIncludingDeleted);
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Console.WriteLine($"✓ 使用 IgnoreQueryFilters() 仍可查询到: {allIncludingDeleted.Name}");
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}
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/// <summary>
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/// 演示: 软删除 vs 物理删除
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/// </summary>
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[TestMethod]
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public async Task Demo_SoftDeleteVsPhysicalDelete()
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{
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var builder = new DataContextBuilder<TestDbContext>();
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builder.UseInMemoryDatabase($"DeleteCompareDemo_{Guid.NewGuid()}")
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.UseAudit(true)
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.UseSoftDelete(true)
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.UseCurrentUser("admin");
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using var db = builder.Build();
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// 1. 软删除：Product 实现了 ISoftDeletable
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var productRepo = db.Repository<Product>();
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var product = new Product { Name = "软删除产品", Price = 100m, Stock = 10 };
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await productRepo.AddAsync(product);
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await db.SaveChangesAsync();
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await productRepo.RemoveAsync(product.Id);
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await db.SaveChangesAsync();
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Console.WriteLine("1. 软删除 (Product):");
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Console.WriteLine($" ✓ IsDeleted 被设置为 true");
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Console.WriteLine($" ✓ 数据仍在数据库中");
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Console.WriteLine($" ✓ 正常查询看不到");
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// 验证数据仍在
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var productStillExists = await db.Context.Set<Product>()
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.IgnoreQueryFilters()
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.AnyAsync(p => p.Id == product.Id);
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Assert.IsTrue(productStillExists);
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// 2. 物理删除：Category 不实现 ISoftDeletable
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var categoryRepo = db.Repository<Category>();
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var category = new Category { Name = "物理删除分类" };
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await categoryRepo.AddAsync(category);
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await db.SaveChangesAsync();
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categoryRepo.Remove(category);
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await db.SaveChangesAsync();
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Console.WriteLine("\n2. 物理删除 (Category):");
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Console.WriteLine($" ✓ 记录被真正删除");
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Console.WriteLine($" ✓ 数据库中不再存在");
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// 验证数据不在
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var categoryDeleted = await db.Context.Set<Category>()
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.AnyAsync(c => c.Id == category.Id);
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Assert.IsFalse(categoryDeleted);
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}
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/// <summary>
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/// 演示: 查询时自动过滤已删除数据
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/// </summary>
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[TestMethod]
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public async Task Demo_AutoFilterDeletedData()
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{
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var builder = new DataContextBuilder<TestDbContext>();
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builder.UseInMemoryDatabase($"FilterDemo_{Guid.NewGuid()}")
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.UseSoftDelete(true)
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.UseCurrentUser("admin");
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using var db = builder.Build();
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var repo = db.Repository<Product>();
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// 添加 5 个产品
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for (int i = 1; i <= 5; i++)
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{
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await repo.AddAsync(new Product
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{
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Name = $"产品{i}",
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Price = i * 100m,
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Stock = i * 10
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});
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}
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await db.SaveChangesAsync();
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Console.WriteLine("✓ 创建了 5 个产品");
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// 软删除其中 2 个
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var allProducts = await repo.GetAllAsync();
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await repo.RemoveAsync(allProducts[0].Id);
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await repo.RemoveAsync(allProducts[1].Id);
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await db.SaveChangesAsync();
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Console.WriteLine("✓ 软删除了 2 个产品");
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// 正常查询只返回未删除的
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var activeProducts = await repo.GetAllAsync();
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Console.WriteLine($"\n✓ 正常查询返回: {activeProducts.Count} 个产品（自动过滤已删除）");
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Assert.AreEqual(3, activeProducts.Count);
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// 使用 IgnoreQueryFilters 查询所有
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var allIncludingDeleted = await db.Context.Set<Product>()
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.IgnoreQueryFilters()
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.ToListAsync();
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Console.WriteLine($"✓ IgnoreQueryFilters 返回: {allIncludingDeleted.Count} 个产品（包含已删除）");
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Assert.AreEqual(5, allIncludingDeleted.Count);
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// 只查询已删除的
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var deletedOnly = await db.Context.Set<Product>()
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.IgnoreQueryFilters()
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.Where(p => p.IsDeleted)
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.ToListAsync();
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Console.WriteLine($"✓ 只查询已删除: {deletedOnly.Count} 个产品");
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Assert.AreEqual(2, deletedOnly.Count);
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}
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/// <summary>
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/// 演示: 软删除的实际应用场景
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/// </summary>
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[TestMethod]
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public async Task Demo_SoftDeleteRealWorldScenario()
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{
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var builder = new DataContextBuilder<TestDbContext>();
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builder.UseInMemoryDatabase($"RealWorldSoftDelete_{Guid.NewGuid()}")
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.UseAudit(true)
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.UseSoftDelete(true)
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.UseCurrentUser("admin");
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using var db = builder.Build();
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var repo = db.Repository<Product>();
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Console.WriteLine("=== 产品下架场景 ===\n");
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// 1. 创建产品
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var product = new Product
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{
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Name = "iPhone 14",
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Price = 6999m,
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Stock = 100
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};
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await repo.AddAsync(product);
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await db.SaveChangesAsync();
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Console.WriteLine($"1. 产品上架");
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Console.WriteLine($" {product.Name} - {product.Price:C}");
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// 2. 产品下架（软删除）
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// (db as Sharp.Data.Context.DataContext)?.SetCurrentUser("product.manager");
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await repo.RemoveAsync(product.Id);
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await db.SaveChangesAsync();
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Console.WriteLine($"\n2. 产品下架");
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Console.WriteLine($" 操作人: {product.DeletedBy}");
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Console.WriteLine($" 下架时间: {product.DeletedAt:yyyy-MM-dd HH:mm:ss}");
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// 3. 用户无法看到下架产品
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var userVisibleProducts = await repo.GetAllAsync();
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Console.WriteLine($"\n3. 用户视角");
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Console.WriteLine($" 可见产品数: {userVisibleProducts.Count} (下架产品不可见)");
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// 4. 管理员可以查看下架产品历史
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var allProducts = await db.Context.Set<Product>()
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.IgnoreQueryFilters()
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.ToListAsync();
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Console.WriteLine($"\n4. 管理员视角");
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Console.WriteLine($" 所有产品（含下架）: {allProducts.Count}");
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Console.WriteLine($" 可恢复下架产品的历史数据");
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Console.WriteLine($"\n✓ 软删除的优势:");
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Console.WriteLine($" - 保留历史数据");
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Console.WriteLine($" - 可以恢复");
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Console.WriteLine($" - 可以审计追踪");
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Console.WriteLine($" - 满足合规要求");
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}
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/// <summary>
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/// 演示: 批量软删除
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/// </summary>
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[TestMethod]
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public async Task Demo_BulkSoftDelete()
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{
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var builder = new DataContextBuilder<TestDbContext>();
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builder.UseInMemoryDatabase($"BulkSoftDelete_{Guid.NewGuid()}")
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.UseSoftDelete(true)
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.UseCurrentUser("admin");
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using var db = builder.Build();
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var repo = db.Repository<Product>();
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// 添加多个产品
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var products = new List<Product>();
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for (int i = 1; i <= 10; i++)
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{
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products.Add(new Product
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{
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Name = $"产品{i}",
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Price = i * 100m,
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Stock = i * 10
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});
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}
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await repo.AddRangeAsync(products);
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await db.SaveChangesAsync();
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Console.WriteLine($"✓ 创建了 {products.Count} 个产品");
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// 批量软删除价格 > 500 的产品
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var expensiveProducts = await repo.FindAsync(p => p.Price > 500);
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repo.RemoveRange(expensiveProducts);
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await db.SaveChangesAsync();
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Console.WriteLine($"✓ 批量软删除了 {expensiveProducts.Count} 个产品（价格>500）");
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// 验证
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var remaining = await repo.GetAllAsync();
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Console.WriteLine($"✓ 剩余可见产品: {remaining.Count} 个");
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Assert.AreEqual(5, remaining.Count);
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foreach (var p in expensiveProducts)
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{
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Assert.IsTrue(p.IsDeleted);
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}
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}
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/// <summary>
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/// 演示: 只实现软删除，不要审计
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///
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/// Notification 只实现了 ISoftDeletable
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/// </summary>
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[TestMethod]
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public async Task Demo_SoftDeleteWithoutAudit()
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{
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var builder = new DataContextBuilder<TestDbContext>();
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builder.UseInMemoryDatabase($"SoftDeleteOnly_{Guid.NewGuid()}")
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.UseSoftDelete(true)
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.UseCurrentUser("admin");
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using var db = builder.Build();
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var repo = db.Repository<Notification>();
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// 创建通知
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var notification = new Notification
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{
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Title = "系统通知",
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Content = "这是一条测试通知",
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CreatedAt = DateTime.UtcNow
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};
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await repo.AddAsync(notification);
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await db.SaveChangesAsync();
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// 软删除
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await repo.RemoveAsync(notification.Id);
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await db.SaveChangesAsync();
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Console.WriteLine("✓ Notification 只实现软删除，不要审计:");
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Console.WriteLine($" IsDeleted: {notification.IsDeleted}");
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Console.WriteLine($" DeletedAt: {notification.DeletedAt:yyyy-MM-dd HH:mm:ss}");
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Console.WriteLine($" DeletedBy: {notification.DeletedBy}");
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Console.WriteLine($" 没有 CreatedBy/UpdatedBy 字段");
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Assert.IsTrue(notification.IsDeleted);
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}
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/// <summary>
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/// 演示: 禁用软删除时的行为
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/// </summary>
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[TestMethod]
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public async Task Demo_DisableSoftDelete()
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{
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var builder = new DataContextBuilder<TestDbContext>();
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builder.UseInMemoryDatabase($"DisableSoftDelete_{Guid.NewGuid()}")
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.UseSoftDelete(false) // 禁用软删除
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.UseCurrentUser("admin");
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using var db = builder.Build();
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var repo = db.Repository<Product>();
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// 添加产品
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var product = new Product { Name = "测试产品", Price = 100m, Stock = 10 };
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await repo.AddAsync(product);
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await db.SaveChangesAsync();
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var productId = product.Id;
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// 删除产品（禁用软删除后，RemoveAsync 会尝试物理删除）
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// 但 Product 实体仍有 IsDeleted 字段，所以可能变成软删除
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await repo.RemoveAsync(productId);
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await db.SaveChangesAsync();
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Console.WriteLine("✓ 禁用软删除功能后:");
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Console.WriteLine($" RemoveAsync 的行为取决于实现");
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Console.WriteLine($" 建议：如果不需要软删除，不要让实体实现 ISoftDeletable");
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// 查询
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var found = await db.Context.Set<Product>()
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.IgnoreQueryFilters()
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.FirstOrDefaultAsync(p => p.Id == productId);
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if (found != null)
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{
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Console.WriteLine($" 结果：软删除 (IsDeleted={found.IsDeleted})");
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}
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else
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{
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Console.WriteLine($" 结果：物理删除");
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}
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}
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}
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