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  1. C# Driver
  2. CSHARP-1984

String array is not serialized when casted to object

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    • Type: Icon: Bug Bug
    • Resolution: Duplicate
    • Priority: Icon: Major - P3 Major - P3
    • None
    • Affects Version/s: 2.4.3
    • Component/s: Serialization
    • None
    • Environment:
      .NET 4.5.1. We are upgrading the driver from v1.8.x. Project infrastructure does not allow generics yet so cast to object is used as a workaround.

      Trying to build update command with $set operator using UpdateDefinitionBuilder. However it does not serialize string arrays when they are casted to object. Instead it gives "(Collection)".
      This works fine in v2.4.2. But is broken in v2.4.3.
      Looks like it works fine with other arrays too. Problem is just with string arrays.

      Here is simple console app to show to issue:

      class Program
    {
        static void Main(string[] args)
        {
            var updateBuilder = new UpdateDefinitionBuilder<Item>();
            var fooValue = new List<int> { 11, 22, 33 };
            var barValue = new List<string> { "Bar1", "Bar2", "Bar3" };
            
            Console.WriteLine(Render(updateBuilder.Set<List<int>>(x => x.Foo, fooValue)));
            Console.WriteLine(Render(updateBuilder.Set<List<string>>(x => x.Bar, barValue)));
            Console.WriteLine(Render(updateBuilder.Set<object>(x => x.Foo, fooValue)));
            Console.WriteLine(Render(updateBuilder.Set<object>(x => x.Bar, barValue)));
            Console.ReadKey();
        }

        public class Item
        {
            public Guid Id { get; set; }
            public List<int> Foo { get; set; }
            public List<string> Bar { get; set; }
        }

        private static string Render(UpdateDefinition<Item> definition)
        {
            var settings = new MongoCollectionSettings();
            var serializer = settings.SerializerRegistry.GetSerializer<Item>();
            return definition.Render(serializer, settings.SerializerRegistry).ToString();
        }
    }

      Output with v2.4.2:

      { "$set" : { "Foo" : [11, 22, 33] } }
{ "$set" : { "Bar" : ["Bar1", "Bar2", "Bar3"] } }
{ "$set" : { "Foo" : { "_t" : "System.Collections.Generic.List`1[System.Int32]", "_v" : [11, 22, 33] } } }
{ "$set" : { "Bar" : { "_t" : "System.Collections.Generic.List`1[System.String]", "_v" : ["Bar1", "Bar2", "Bar3"] } } }

      Output with v2.4.3:

      { "$set" : { "Foo" : [11, 22, 33] } }
{ "$set" : { "Bar" : ["Bar1", "Bar2", "Bar3"] } }
{ "$set" : { "Foo" : { "_t" : "System.Collections.Generic.List`1[System.Int32]", "_v" : [11, 22, 33] } } }
{ "$set" : { "Bar" : "(Collection)" } }

            Assignee:
            robert@mongodb.com Robert Stam
            Reporter:
            andrius.zalimas@gmail.com Andrius Zalimas
            Votes:
            5 Vote for this issue
            Watchers:
            12 Start watching this issue

              Created:
              Updated:
              Resolved: