为什么 EntityFramework 不添加我的对象？

Question

我正在使用AutoBogus 测试数据填充内存数据库，如下所示：

// Create dummy data.
var goalFaker = new AutoFaker<Goal>()
    .RuleFor(g => g.Id, f => f.IndexFaker + 1); // +1 for the non-zero primary key.
var goals = goalFaker.Generate(10);

// Use a dummy in-memory database instead of a real one.
var options = new DbContextOptionsBuilder<GoalContext>()
    .UseInMemoryDatabase(databaseName: "TestDatabase")
    .Options;

// Save our dummy data to our dummy database.
using (var context = new GoalContext(options))
{
     context.AddRange(goals);
     context.SaveChanges();
}

但是，数据永远不会保存！它完全被忽略了。

我做错了什么？如何让我的测试数据在测试中持续存在？

Answer 1

我遇到的问题是Goal 是一个抽象类。一旦我切换到虚拟化具体实现，问题就消失了。

// Create dummy data.
var goalFaker = new AutoFaker<SmartGoal>() // <--- Swap in concrete SmartGoal for abstract Goal.
    .RuleFor(g => g.Id, f => f.IndexFaker + 1);
var goals = goalFaker.Generate(10);

// Use a dummy in-memory database instead of a real one.
var options = new DbContextOptionsBuilder<GoalContext>()
    .UseInMemoryDatabase(databaseName: "TestDatabase")
    .Options;

// Save our dummy data to our dummy database.
using (var context = new GoalContext(options))
{
     context.AddRange(goals);
     context.SaveChanges();
}