Cosmos Where query on owned properties throws a translation exception

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I’m in the process of implementing a Cosmos DB access with an entity framework provider, And every query I’m trying to run on Owned Entity gets a translation error. I tried many different queries. and I get this error only on owned entities like in the code example. I think this query type should be possible like in this test: https://github.com/dotnet/efcore/blob/main/test/EFCore.Cosmos.FunctionalTests/Query/OwnedQueryCosmosTest.cs

code

The (simplefied) document classes

	public class StructuredTrial
	{
		public string TrialId { get; set; }
		public ICollection<StringWrapper> ConditionCodesList { get; set; }
	}

	public class StringWrapper
	{
		[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
		public string Id { get; set; }
		public string StrValue { get; set; }
	}

Context definition:

modelBuilder.HasDefaultContainer("StructuredTrials");
			modelBuilder.Entity<StructuredTrial>().HasKey(s => s.TrialId);
			modelBuilder.Entity<StructuredTrial>().HasPartitionKey(s => s.TrialId);
			modelBuilder.Entity<StructuredTrial>().OwnsMany(c => c.ConditionCodesList, c =>
			{
				c.HasKey(p => p.Id);
			});

Calling code I tried, with similar error (error provided is for the first one):

var db = new KnowledgeGraphDBContext(_dbOptions);
var studiesQuery = await db.StructuredTrials.AsQueryable()
				                       .Where(s => s.ConditionCodesList.IsDefined()).ToListAsync();
				                       
var studiesQuery = await db.StructuredTrials.AsQueryable()
				                       .Where(s => s.ConditionCodesList.Count() > 0).ToListAsync();	

var studiesQuery = await db.StructuredTrials.AsQueryable()
				                       .Where(s => s.ConditionCodesList.Contains(null)).ToListAsync();				                     

Error Output

System.InvalidOperationException: 'The LINQ expression 'DbSet<StructuredTrialTest>()
    .Where(s => MaterializeCollectionNavigation(
        Navigation: StructuredTrialTest.ConditionCodesList,
        subquery: EF.Property<ICollection<StringWrapperTest>>(s, "ConditionCodesList")
            .AsQueryable()
        .IsDefined())' could not be translated. Either rewrite the query in a form that can be translated, or switch to client evaluation explicitly by inserting a call to 'AsEnumerable', 'AsAsyncEnumerable', 'ToList', or 'ToListAsync'. See https://go.microsoft.com/fwlink/?linkid=2101038 for more information.'

stack traces

   at Microsoft.EntityFrameworkCore.Query.QueryableMethodTranslatingExpressionVisitor.<VisitMethodCall>g__CheckTranslated|15_0(ShapedQueryExpression translated, <>c__DisplayClass15_0& ) in /_/src/EFCore/Query/QueryableMethodTranslatingExpressionVisitor.cs:line 105

Include provider and version information

EF Core version: Database provider: (e.g. Microsoft.EntityFrameworkCore.Cosmos 5.0.12) Target framework: (e.g. .NET 3.1) Operating system: IDE: (e.g. Visual Studio 2022 17.0.1)

[ajcvickers]

@yochail Which test do you mean, specifically? Many of those tests are skipped with reference to #17246.

[ajcvickers]

@smitpatel IsDefined comes from the Microsoft.Azure.Cosmos.Linq LINQ provider. It’s interesting to consider that people may try to use these with the EF Core LINQ provider.

/cc @AndriySvyryd