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  1. C# Driver
  2. CSHARP-4532

We're no longer able to use dynamic as property types

    • Type: Icon: Bug Bug
    • Resolution: Duplicate
    • Priority: Icon: Unknown Unknown
    • None
    • Affects Version/s: 2.19.0
    • Component/s: Serialization
    • None
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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?

      Hi

      We're having problems with the `ObjectSerializer` for the MongoDB.Driver.Core driver version `2.19.0`.

      We're storing "fingerprints" of objects where we use dynamic to save the properties used to calculate what we call a "fingerprint"-hash.

      We have the following class
      ```c#
      public class Fingerprint
      {
      [BsonElement("id"), BsonId, BsonIgnoreIfDefault, BsonRepresentation(BsonType.ObjectId)]
      public string Id

      { get; set; }
      [BsonElement("createdAt"), BsonDateTimeOptions(Kind = DateTimeKind.Utc)]
      public DateTime CreatedAt { get; set; }

      = DateTime.Now;
      [BsonElement("hash")]
      public string Hash

      { get; set; }
      [BsonElement("data")]
      public object Data { get; set; }

      [BsonElement("metadata")]
      public object Metadata

      { get; set; }

      }
      ```

      We're then creating an instance of this object that populate our dynamic fields with C# base types (`int`, `long`, `boolean` etc.)

      ```c#
      public Models.Fingerprint ToFingerprint => new Models.Fingerprint
      {
      Hash = Fingerprint,
      Data = new
      {
      Data.UserId,
      Data.Name,
      Data.Type,
      Data.Domain,
      Data.SiteName,
      Data.Role,
      Camps = new

      { Count = CampsData.CampCount, NotInvoiced = CampsData.NotInvoicedCount }

      ,
      Club = new

      { ClubData.Id, ClubData.Name, ClubData.AttributeCount, ClubData.AttributeCategoryCount, ClubData.GroupsInClubCount, ClubData.HasActivatedBilling, ClubData.HasActivatedCriminalRecordSettings, ClubData.HasActivatedLokIntegration, ClubData.HasActivatedMembershipCards, ClubData.HasClubLogo, ClubData.HasFacebookConnection, ClubData.KakserviceSaleCreatedAt, ClubData.MembershipInvoicesCount, ClubData.MissingCriminalRecordCount, ClubData.NewbodySaleCreatedAt, ClubData.PersonsCount, ClubData.YoucalAgreementStatus }

      ,
      Package = new

      { Packages.Type, Packages.Package }

      },
      Metadata = new

      { Data.Id }

      };
      ```

      When using Newtonsoft we get the following result

      ```json
      {
          "id": null,
          "createdAt": "2023-02-17T18:06:40.3767748+01:00",
          "hash": "E929580C21FD36E878CCA03E38D95C57CD1DB7507A55965DFD036C2F9BFFE2AF821C616485EDAA7CF68A48E66A153F9A688829E692F440C78B56F7377AC37F5E",
          "data": {
              "userId": 1024439,
              "name": "Eds FF",
              "type": 3,
              "domain": "laget.se",
              "siteName": "EdsFF",
              "role": 1,
              "camps":

      {             "count": 0,             "notInvoiced": 0         }

      ,
              "club":

      {             "id": 22633,             "name": "Eds FF",             "attributeCount": 0,             "attributeCategoryCount": 0,             "groupsInClubCount": 44,             "hasActivatedBilling": true,             "hasActivatedCriminalRecordSettings": false,             "hasActivatedLokIntegration": true,             "hasActivatedMembershipCards": true,             "hasClubLogo": true,             "hasFacebookConnection": true,             "kakserviceSaleCreatedAt": null,             "membershipInvoicesCount": 1878,             "missingCriminalRecordCount": 73,             "newbodySaleCreatedAt": null,             "personsCount": 1010,             "youcalAgreementStatus": 2         }

      ,
              "package": {
                  "type": 0,
                  "package":

      {                 "siteId": 61958,                 "siteType": 3,                 "packageType": 3,                 "daysLeft": 4930             }

              }
          },
          "metadata":

      {         "id": 61958     }

      }
      ```

      Why can't we longer use `dynamic` as a propety type?

      Kind Regards
      Erik

            Assignee:
            boris.dogadov@mongodb.com Boris Dogadov
            Reporter:
            erik.hennerfors@laget.se Erik Hennerfors
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              Created:
              Updated:
              Resolved: