我对mongodb中存储的对象有以下类层次结构(我只在其图形中存储了Branch对象和实体)
public class Branch : Aggregate
{
public IEnumerable<LocalizableText> Description { get; set; }
public ObjectId PartnerId { get; set; }
public double Latitude { get; set; }
public double Longitude { get; set; }
public string Timetable { get; set; }
public IEnumerable<Discount> Discounts { get; set; }
public IEnumerable<Category> Categories { get; set; }
public IEnumerable<Phone> Phones { get; set; }
public byte[] Icon { get; set; }
public byte[] Image { get; set; }
}
public abstract class Aggregate : Entity
{
public ObjectId Id { get; set; }
}
public abstract class Entity
{
public IEnumerable<LocalizableText> Name { get; set; }
}
我在此层次结构的服务器启动时运行以下注册:
BsonClassMap.RegisterClassMap<Entity>();
BsonClassMap.RegisterClassMap<Aggregate>(cm =>
{
cm.AutoMap();
cm.SetIdMember(cm.GetMemberMap(a => a.Id));
});
BsonClassMap.RegisterClassMap<Branch>();
但是当我运行此查询时
return await Collection.Aggregate().Match(x => x.PartnerId == partnerId)
.Group(x => x.PartnerId, g => new
{
PartnerId = g.Key,
g.First(x => x.Name != null).Name,
Description = g.First(x => x.Id == branchId).Name,
g.First(x => x.Id == branchId).Discounts,
Id = branchId
})
.Project(g => new Branch()
{
Id = g.Id,
Name = g.Name,
Description = g.Description,
Discounts = g.Discounts,
PartnerId = g.PartnerId
}).FirstOrDefaultAsync();
我遇到以下异常:
测试方法ShouldGetBranchToolTipAsync抛出异常:
System.ArgumentOutOfRangeException:memberInfo参数必须是 对于类Branch,但是对于类Aggregate。
参数名称:memberInfo 在MongoDB.Bson.Serialization.BsonClassMap.EnsureMemberInfoIsForThisClass(MemberInfo memberInfo) 在 MongoDB.Bson.Serialization.BsonClassMap.MapMember(的MemberInfo的MemberInfo) 在 MongoDB.Driver.Linq.Translators.AggregateProjectionTranslator.SerializerBuilder.BuildProjectedSerializer(ProjectionMapping映射) 在 MongoDB.Driver.Linq.Translators.AggregateProjectionTranslator.SerializerBuilder.BuildMemberInit(MemberInitExpression节点) 在 MongoDB.Driver.Linq.Translators.AggregateProjectionTranslator.SerializerBuilder.Build(表达式节点) 在 MongoDB.Driver.Linq.Translators.AggregateProjectionTranslator.SerializerBuilder.Build(表达式节点,IBsonSerializerRegistry serializerRegistry) 在 MongoDB.Driver.Linq.Translators.AggregateProjectionTranslator.TranslateProject(表达式
1 projector, IBsonSerializer
1 ParameterSerializer把,IBsonSerializerRegistry serializerRegistry) 在 MongoDB.Driver.IAggregateFluentExtensions.ProjectExpressionProjection2.Render(IBsonSerializer
1 documentSerializer,IBsonSerializerRegistry serializerRegistry)
这是什么原因?映射不正确或在错误的时间调用?
答案 0 :(得分:2)
根据mongodb开发者的说法,我已经联系过这个问题
有关详细信息,请参阅此ticket。
将在2.0.1及更高版本中进行改进以解决此问题。