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  1. C# Driver
  2. CSHARP-1919

Filter builder Where method with nullable Enum value doesn't render correctly

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    • Type: Icon: Bug Bug
    • Resolution: Done
    • Priority: Icon: Major - P3 Major - P3
    • 2.4.3
    • Affects Version/s: 2.4.2
    • Component/s: API, Linq
    • None
    • Minor Change

      When a non-nullable enum field is compared to a nullable value the filter does not render correctly.

      To reproduce use these types:

      public enum E { A, B }

public class C
{
    public int Id { get; set; }
    [BsonRepresentation(BsonType.String)]
    public E E { get; set; }
}

      And this code:

      var builder = Builders<C>.Filter;
var value = (E?)E.A;
var filter = builder.Where(x => x.E == value);
var registry = BsonSerializer.SerializerRegistry;
var serializer = registry.GetSerializer<C>();
var rendered = filter.Render(serializer, registry).ToJson();

      The filter renders as:

      "{ \"E\" : 0 }"

      but should have rendered as:

      "{ \"E\" : \"A\" }"

      because the underlying field serializer uses String representation.

            Assignee:
            robert@mongodb.com Robert Stam
            Reporter:
            robert@mongodb.com Robert Stam
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              Created:
              Updated:
              Resolved: