使用c＃和linq查询mongo中的嵌套属性

Question

I'm trying to use linq queries to filter results from Mongo, but none of my queries using complex objects work:

The following works just fine :

query.Where(o => (o.Name == "Joe"))

But this gives me errors:

query.Where(o => (o.Address.HouseNumber == "1234"))

With version 2.1.1 of the c# drivers if I use the legacy drivers I get:

Unable to determine the serialization information for the expression: p.Address.HouseNumber

at MongoDB.Driver.Linq.Utils.BsonSerializationInfoFinder.GetSerializationInfo(Expression node, Dictionary 2 serializationInfoCache) at MongoDB.Driver.Linq.Utils.BsonSerializationInfoHelper.GetSerializationInfo(Expression node) at MongoDB.Driver.Linq.PredicateTranslator.BuildComparisonQuery(Expression variableExpression, ExpressionType operatorType, ConstantExpression constantExpression) at MongoDB.Driver.Linq.PredicateTranslator.BuildComparisonQuery(BinaryExpression binaryExpression) at MongoDB.Driver.Linq.PredicateTranslator.BuildQuery(Expression expression) at MongoDB.Driver.Linq.PredicateTranslator.BuildAndAlsoQuery(BinaryExpression binaryExpression) at MongoDB.Driver.Linq.PredicateTranslator.BuildQuery(Expression expression) at MongoDB.Driver.Linq.SelectQuery.BuildQuery() at MongoDB.Driver.Linq.SelectQuery.Execute() at MongoDB.Driver.Linq.MongoQueryProvider.Execute(Expression expression) at MongoDB.Driver.Linq.MongoQueryable 1.GetEnumerator() at System.Collections.Generic.List 1..ctor(IEnumerable 1..ctor(IEnumerable 1 collection)
at System.Linq.Enumerable.ToList[TSource](IEnumerable 1 source) at Core.Persistence.LegacyMongoDb.LegacyMongoDbImp.<QueryAsync>d__10 1.MoveNext() in C:\\Users...\\src\\Core.Persistence.LegacyMongoDb\\LegacyMongoDb.Implementation.cs:line 84

If I use the current version of the drivers I get:

[Address].HouseNumber is not supported.

at MongoDB.Driver.Linq.Translators.PredicateTranslator.GetFieldExpression(Expression expression) at MongoDB.Driver.Linq.Translators.PredicateTranslator.TranslateComparison(Expression variableExpression, ExpressionType operatorType, ConstantExpression constantExpression) at MongoDB.Driver.Linq.Translators.PredicateTranslator.TranslateComparison(BinaryExpression binaryExpression) at MongoDB.Driver.Linq.Translators.PredicateTranslator.Translate(Expression node) at MongoDB.Driver.Linq.Translators.PredicateTranslator.Translate(Expression node, IBsonSerializerRegistry serializerRegistry) at MongoDB.Driver.Linq.Translators.QueryableTranslator.TranslateWhere(WhereExpression node) at MongoDB.Driver.Linq.Translators.QueryableTranslator.Translate(Expression node) at MongoDB.Driver.Linq.Translators.QueryableTranslator.TranslateSkip(SkipExpression node) at MongoDB.Driver.Linq.Translators.QueryableTranslator.Translate(Expression node) at MongoDB.Driver.Linq.Translators.QueryableTranslator.TranslateT ake(TakeExpression node) at MongoDB.Driver.Linq.Translators.QueryableTranslator.Translate(Expression node) at MongoDB.Driver.Linq.Translators.QueryableTranslator.TranslatePipeline(PipelineExpression node) at MongoDB.Driver.Linq.Translators.QueryableTranslator.Translate(Expression node) at MongoDB.Driver.Linq.Translators.QueryableTranslator.Translate(Expression node, IBsonSerializerRegistry serializerRegistry) at MongoDB.Driver.Linq.MongoQueryProviderImpl 1.Translate(Expression expression) at MongoDB.Driver.Linq.MongoQueryProviderImpl 1.ExecuteAsync[TResult](Expression expression, CancellationToken cancellationToken) at MongoDB.Driver.Linq.MongoQueryableImpl 2.ToCursorAsync(CancellationToken cancellationToken) at MongoDB.Driver.IAsyncCursorSourceExtensions.<ToListAsync>d__4 1.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.Ha ndleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter 1.GetResult() at Core.Persistence.MongoDb.MongoDbImp.<QueryAsync>d__12 1.MoveNext() in C:\\Users...\\libs\\mojio.core\\src\\Core.Persistence.MongoDb\\MongoDb.Implementation.cs:line 68

I'm super stuck any help in the right direction would be appreciated

EDIT:

public class User : Base<User>, IUser
{
     public string Name { get; set; }
     public IAddress Address { get; set; }
}


public class Address : IAddress
{
     public string HouseNumber { get; set; }
     public string City { get; set; }
     public string Country { get; set; }

}

Answer 1

I'm testing it using complex objects and it seems to be working for me. What version of Mongo C# driver are you using? Can you give more details about your complex objects? Maybe listing the properties of both the objects would help.