C# Driver
  1. C# Driver
  2. CSHARP-587

Overwrite serializers in BsonSerializer

      Details

      • Type: Improvement Improvement
      • Status: Closed Closed
      • Priority: Minor - P4 Minor - P4
      • Resolution: Works as Designed
      • Affects Version/s: None
      • Fix Version/s: None
      • Component/s: None
      • Labels:
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      • # Replies:
        2
      • Last comment by Customer:
        true

        Description

        It would be nice if there was a way to override default serializers for primitive types. While it can be worked around by registering serializers before the sctor of BsonSerializer executes or by using Reflection, a more straight-forward way would probably be to include a version of BsonSerializer.RegisterSerializer that allows to overwrite serializers for already covered types.

        This stackoverflow question might be able to provide more context (note, I am not the original poster of said question): http://stackoverflow.com/questions/12201812/mongodb-override-default-serializer-for-a-c-sharp-primitive-type/12636123#comment17048789_12636123

          Issue Links

          duplicates

          Question - CSHARP-583 Allow Injection of custom primitive serializers into existing Seralization Stack

          • Minor - P4 - Minor loss of function, or other problem where easy workaround is present.
          • Closed - The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.

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            Craig Wilson             added a comment -

            While I understand what you are saying, it isn't a good solution to enable changing the serializer for a type after it has already been used. For instance, if this was possible, the below sequence of events would be awkward.

            • save an entity with a double
            • change the double's serializer
            • read the entity with a double

            Obviously, what would be read would be different than what was written, making the data un-uniform.

            As Robert mentioned in the StackOverflow question, you can replace the default serializers for primitive types. The idea is that their is an implicit initialization phase for your applications, prior to any communication with MongoDB. In this initialization area, you can do virtually anything. The static ctor of BsonSerializer definitely runs prior to registration of new serializers (otherwise, .NET is broken). The reason Robert's suggestion works is because the defaults are part of a lazy serializer registration system (IBsonSerializabionProvider). Until a serializer for a type is needed, it isn't registered. Therefore, if you register a serializer for a type (e.g. double) before it is used, then you have replaced the defaults.

            Show
            Craig Wilson             added a comment - While I understand what you are saying, it isn't a good solution to enable changing the serializer for a type after it has already been used. For instance, if this was possible, the below sequence of events would be awkward. save an entity with a double change the double's serializer read the entity with a double Obviously, what would be read would be different than what was written, making the data un-uniform. As Robert mentioned in the StackOverflow question, you can replace the default serializers for primitive types. The idea is that their is an implicit initialization phase for your applications, prior to any communication with MongoDB. In this initialization area, you can do virtually anything. The static ctor of BsonSerializer definitely runs prior to registration of new serializers (otherwise, .NET is broken). The reason Robert's suggestion works is because the defaults are part of a lazy serializer registration system (IBsonSerializabionProvider). Until a serializer for a type is needed, it isn't registered. Therefore, if you register a serializer for a type (e.g. double) before it is used, then you have replaced the defaults.
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            Craig Wilson             added a comment -

            This works as designed.

            Show
            Craig Wilson             added a comment - This works as designed.

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                Dates

                • Created:
                  Updated:
                  Resolved:
                  Days since reply:
                  2 years, 20 weeks, 4 days ago
                  Date of 1st Reply: