[英]mongodb c# driver - inheritance, mappings and serialization issue
对于存储在mongodb中的对象,我有以下类层次结构(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>();
但是当我运行这个查询时
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();
我收到以下异常:
测试方法ShouldGetBranchToolTipAsync抛出异常:
System.ArgumentOutOfRangeException:memberInfo参数必须是类Branch,但是对于类Aggregate。
参数名称:MongoDB.Bson中的MongoDB.Bson.Serialization.BsonClassMap.EnsureMemberInfoIsForThisClass(MemberInfo memberInfo)中的成员信息。在MongoDB.Driver.Linq.Translators.AggregateProjectionTranslator.SerializerBuilder.BuildProjectedSerializer(ProjectionMapping mapping)中的MongoDB.Bson.Serialization.BsonClassMap.MapMember(MemberInfo memberInfo)位于MongoDB.Driver.Linq.Translators.AggregateProjectionTranslator.Linq.Translators.AggregateProjectionTranslator.SerializerBuilder.Build的MongoDB.Dinver.Linq.Translators.AggregateProjectionTranslator.SerializerBuilder.Build(Expression node)中的MongoDB.Driver.Linq.Translators.AggregateProjectionTranslator.SerializerBuilder.BuildMemberInit(MemberInitExpression节点) (表达式节点,IBsonSerializerRegistry serializerRegistry)MongoDB.Driver.Linq.Translators.AggregateProjectionTranslator.TranslateProject(表达式
1 projector, IBsonSerializer
1参数序列,IBSONSerializerRegistry serializerRegistry)在MongoDB.Driver.IAggregateFluentExtensions.ProjectExpressionProjection2.Render(IBsonSerializer
2.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?
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