从 MongoDB 获取无类型数据给出“未知鉴别器值”

Question

我们正在使用log4mongo-net 将 log4net 问题保存在 mongo db 中。 现在我们制作了一个简单的页面，我们可以通过从 mongo db 中读取未键入的日志，直接从浏览器中浏览日志。

但是，当日志中包含例如包含对象的 POST 时，此操作将失败，并显示“Unknown discriminator value 'SomeModel'”。

我们能否以某种方式告诉 Mongo 忽略 routedata->ActionArguments->model 的鉴别器，并将其反序列化为无类型？

我们正在使用mongocsharpdriver 2.4.3。

这是我们如何获取数据的概念：

var _collection = MongoDbFactory.GetDatabase(_connectionString).GetCollection<object>(_collectionName);
var result = _mongoLogsRepository.Collection.Find(filter).ToList();

json数据：

{"_id":"5afbf3ec6f21aa0544647ea0","timestamp":"2018-05-16T09:03:40.492Z","level":"ERROR","thread":"19","logger":"X.Intranet.Common.Logging.Logger","message":"WebApi action failed","exceptiondata":{"type":"System.Data.Entity.Validation.DbEntityValidationException","message":"Validation failed for one or more entities. See 'EntityValidationErrors' property for more details.","source":"EntityFramework","stackTrace":"   at System.Data.Entity.Internal.InternalContext.SaveChanges()\r\n   at System.Data.Entity.Internal.LazyInternalContext.SaveChanges()\r\n   at System.Data.Entity.DbContext.SaveChanges()\r\n   at X.Intranet.Data.Contexts.XContext.SaveChanges()\r\n   at X.Intranet.Data.Handlers.ScheduleHandler.AddChange(ScheduleChange change)\r\n   at X.Intranet.Business.Managers.ScheduleManager.LogChange(Nullable`1 scheduleExceptionId, Nullable`1 scheduleExtraId, User currentUser, ScheduleChangeReason reason, Assistant fromAssistant, Assistant toAssistant, DateTimePeriodNullable oldTime, DateTimePeriodNullable newTime, Boolean vacant, Boolean noAssistance, String note)\r\n   at X.Intranet.Business.Managers.ScheduleManager.AddVacantAnswer(WorkingPeriod period, Boolean answer, String comment, User currentUser)\r\n   at X.Intranet.Ui.Areas.App.Controllers.Api.Assistant.AppScheduleVacanyController.Answer(Int32 clientId, AppScheduleVacantShiftRequest model)\r\n   at lambda_method(Closure , Object , Object[] )\r\n   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass10.<GetExecutor>b__9(Object instance, Object[] methodParameters)\r\n   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.Execute(Object instance, Object[] arguments)\r\n   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__0.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Filters.AuthorizationFilterAttribute.<ExecuteAuthorizationFilterAsyncCore>d__2.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Controllers.ExceptionFilterResult.<ExecuteAsync>d__0.MoveNext()"},"userdata":{"userName":"test.assistent"},"routedata":{"Method":"POST","RequestUrl":"https://xxx.azurewebsites.net:443/app/api/v1/assistant/appschedulevacany/answer?clientId=1786","Controller":"X.Intranet.Ui.Areas.App.Controllers.Api.Assistant.AppScheduleVacanyController","Action":"Answer","ActionArguments":{"clientId":1786,"model":{"_t":"AppScheduleVacantShiftRequest","ShiftItemId":"O:182270:2018-06-13 15:00","Answer":false,"Comment":null}},"ReferrerUrl":null},"data":null}

使用 BsonDocument 代替对象时的 Stacktrace：

在 MongoDB.Bson.BsonValue.System.IConvertible.ToType(Type conversionType, IFormatProvider provider 在 Newtonsoft.Json.JsonWriter.WriteValue(JsonWriter writer, PrimitiveTypeCode typeCode, Object value 在 Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializePrimitive（JsonWriter 编写器，对象值，JsonPrimitiveContract 合同，JsonProperty 成员，JsonContainerContract containerContract，JsonProperty containerProperty 在 Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue（JsonWriter writer，对象值，JsonContract valueContract，JsonProperty 成员，JsonContainerContract containerContract，JsonProperty containerProperty 在 Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty 在 Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue（JsonWriter writer，对象值，JsonContract valueContract，JsonProperty 成员，JsonContainerContract containerContract，JsonProperty containerProperty 在 Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeList（JsonWriter 编写器，IEnumerable 值，JsonArrayContract 合同，JsonProperty 成员，JsonContainerContract 集合合同，JsonProperty containerProperty 在 Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue（JsonWriter writer，对象值，JsonContract valueContract，JsonProperty 成员，JsonContainerContract containerContract，JsonProperty containerProperty 在 Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty 在 Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue（JsonWriter writer，对象值，JsonContract valueContract，JsonProperty 成员，JsonContainerContract containerContract，JsonProperty containerProperty 在 Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeList（JsonWriter 编写器，IEnumerable 值，JsonArrayContract 合同，JsonProperty 成员，JsonContainerContract 集合合同，JsonProperty containerProperty 在 Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue（JsonWriter writer，对象值，JsonContract valueContract，JsonProperty 成员，JsonContainerContract containerContract，JsonProperty containerProperty 在 Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeList（JsonWriter 编写器，IEnumerable 值，JsonArrayContract 合同，JsonProperty 成员，JsonContainerContract 集合合同，JsonProperty containerProperty 在 Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue（JsonWriter writer，对象值，JsonContract valueContract，JsonProperty 成员，JsonContainerContract containerContract，JsonProperty containerProperty 在 Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize（JsonWriter jsonWriter，对象值，类型 objectType 在 Newtonsoft.Json.JsonSerializer.SerializeInternal（JsonWriter jsonWriter，对象值，类型 objectType 在 System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, Encoding EffectiveEncoding 在 System.Net.Http.Formatting.JsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, Encoding EffectiveEncoding 在 System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStream（类型类型，对象值，流 writeStream，HttpContent 内容 在 System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStreamAsync（类型类型，对象值，流 writeStream，HttpContent 内容，TransportContext transportContext，CancellationToken cancelToken）---在 System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStreamAsync --- 在 System. Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务 在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务 在 System.Web.Http.WebHost.HttpControllerHandler.d__1b.MoveNext()

提前致谢！

Answer 1

以下应该有效：

var _collection = MongoDbFactory.GetDatabase(_connectionString).GetCollection<BsonDocument>(_collectionName);