Question

我有以下界面：

public interface IChartDefinitionBasic
{
    [BsonIgnoreIfDefault]
    [BsonRepresentation(BsonType.ObjectId)]
    [BsonId(IdGenerator = typeof(StringObjectIdGenerator))]
    string Id { get; }
    IMetricDefinition MetricDefinition { get; }
}

...以及用于测试目的的简单实现：

    class DummyDefinitionBasic : IChartDefinitionBasic
    {
        internal DummyDefinitionBasic(string metricName)
        {
            MetricDefinition = new DummyMetricDefinition(metricName);
            Id = ObjectId.GenerateNewId().ToString();
        }

        [BsonIgnoreIfDefault]
        [BsonRepresentation(BsonType.ObjectId)]
        [BsonId(IdGenerator = typeof(StringObjectIdGenerator))]
        public string Id { get; private set; }
        public IMetricDefinition MetricDefinition { get; private set; }
    }

下面的测试方法在到达_service.Delete(_dto)行时出现异常（“无法确定c =＆gt; c.Id的序列化信息”）：

[TestClass]
public class MongoChartServiceTest
{
    private readonly MongoChartService _service = new MongoChartService();
    private readonly IChartDefinitionBasic _dto = DummyDefinitionGenerator.GetDummyDefinitionBasic();

    [TestMethod, TestCategory("MongoService")]
    public void MongoChartService_CRD_ExecutesSuccessfully()
    {
        _service.Create(_dto);
        IChartDefinitionBasic dto = null;
        while (dto == null)
        {
            var dtos = _service.GetAllCharts();
            dto = dtos.SingleOrDefault(d => d.Id == _dto.Id);
        }
        _service.Delete(_dto);
        while (dto != null)
        {
            var dtos = _service.GetAllCharts();
            dto = dtos.SingleOrDefault(d => d.Id == _dto.Id);
        }
    }
}

删除方法实现如下：

    public async void Delete(IChartDefinitionBasic instance)
    {
        var builder = new FilterDefinitionBuilder<IChartDefinitionBasic>();
        var filter = builder.Eq(c => c.Id, instance.Id);
        await _collection.DeleteOneAsync(filter);
    }

我发现了这个link，但它似乎没有帮助。而不是c =＆gt; c.Id，我取代了“Id”，但现在测试从未退出;无论如何，我更喜欢使用Expression，因为它更干净（我暂时停留在C＃5.0上）。有人可以解释为什么这不起作用，有什么必要修复它？

为什么MongoDb没有映射Id？

0 个答案: