Support Select new BsonDocument

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    • Type: Bug
    • Resolution: Fixed
    • Priority: Unknown
    • 3.0.0
    • Affects Version/s: None
    • Component/s: None
    • None
    • None
    • Fully Compatible
    • Dotnet Drivers
    • Not Needed
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      1. What would you like to communicate to the user about this feature?
      2. Would you like the user to see examples of the syntax and/or executable code and its output?
      3. Which versions of the driver/connector does this apply to?

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      1. What would you like to communicate to the user about this feature? 2. Would you like the user to see examples of the syntax and/or executable code and its output? 3. Which versions of the driver/connector does this apply to?
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      Issue:

      When trying to use .Select() where the lambda body is a new Dictionary<string,object> or new BsonDocument, the following error is observed:

      System.InvalidOperationException
When called from 'VisitListInit', rewriting a node of type 'System.Linq.Expressions.NewExpression' must return a non-null value of the same type. Alternatively, override 'VisitListInit' and change it to not visit children of this type.

      The original Visit() call occurs in PartialEvaluator.cs.

      Repro:

         [Fact]
    public void Select_Bson_objField_should_work()
    {
        var collection = GetCollection(LinqProvider.V3);

        var queryable = collection.AsQueryable()
            .Select(x => new BsonDocument
            {
                { "a", x.A }
            });

        var stages = Translate(collection, queryable);

        var dt = queryable.ToList();
    }

    [Fact]
    public void Select_Dict_obj_should_work()
    {
        var collection = GetCollection(LinqProvider.V3);

        var queryable = collection.AsQueryable()
            .Select(x => new Dictionary<string, object>
            {
                { "a", x }
            });

        var stages = Translate(collection, queryable);

        var dt = queryable.ToList();
    }

    private class C
    {
        public int A { get; set; }
    }

            Assignee:
            Robert Stam
            Reporter:
            Jania Vandevoorde (Inactive)
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              Created:
              Updated:
              Resolved: