ABP 9.2.0 Mongodb serialization problem #9493

4 Answer(s)

• 

  0

  AI-Bot created 21 days ago

  Support Team ABP Agent

  To resolve the GUID serialization issue after upgrading to ABP 9.2.0 (which uses MongoDB.Driver v3.x), you need to address the change in default GUID representation. The new driver expects GUIDs to be stored with the UuidStandard subtype, but your existing data uses UuidLegacy.

  Here’s how to handle this:

  1. Set the Global GuidRepresentation
     At the very start of your application (before any MongoDB operations), set the default GUID representation to V3:

     MongoDB.Bson.BsonDefaults.GuidRepresentationMode = MongoDB.Bson.GuidRepresentationMode.V3;
     

  2. Migrate Existing Data (if needed)

     • The error occurs because existing documents use the legacy GUID format. You have two options:
       • Migrate your existing data to use UuidStandard (recommended for long-term compatibility).
       • Or, configure your application to read legacy GUIDs, but this is not recommended for new projects.

     See the official MongoDB migration guide for details:
     https://abp.io/docs/9.2/release-info/migration-guides/MongoDB-Driver-2-to-3

  3. Update Serialization Settings (if you have custom settings)
     If you have custom serialization logic, ensure you use the new GuidRepresentationMode.V3 and do not set the obsolete GuidRepresentation property.

  4. Restart Your Application
     After making these changes, restart your application to ensure the new settings take effect.

  ---

  Sources:

  • ABP 9.2 Migration Guide
  • MongoDB Driver 2 to 3 Migration Guide (ABP)
  • MongoDB C# Driver: GUID Serialization

  ---

  This response was generated by AI. If it didn’t solve your problem, feel free to post a new answer — our support team will jump in to help you soon.

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  0

  connect created 21 days ago

  No it doesn't help. I tried to run some small script as follows but still i getting the same error. I dropped my collections in local mongodb then it worked. How can i fix this to my production now?

  
  public static class MongoDBGUIDMigrations
  {
      public static async Task Migrate()
      {
         BsonSerializer.RegisterSerializer(new GuidSerializer(GuidRepresentation.Standard));
  
          var connectionString = "mongodb://localhost:27017"; // Replace as needed
          var dbName = "your-database-name"; // Replace with your DB name
  
          var settings = MongoClientSettings.FromConnectionString(connectionString);
          var client = new MongoClient(settings);
          var database = client.GetDatabase(dbName);
  
          // STEP 3: Get all collection names
          var collections = await database.ListCollectionNamesAsync();
          var collectionNames = await collections.ToListAsync();
  
          Console.WriteLine($"Found {collectionNames.Count} collections.");
  
          foreach (var collectionName in collectionNames)
          {
              Console.WriteLine($"\n🔄 Processing collection: {collectionName}");
  
              // Use BsonDocument to handle dynamic schemas
              var collection = database.GetCollection<BsonDocument>(collectionName);
  
              var documents = await collection.Find(FilterDefinition<BsonDocument>.Empty).ToListAsync();
  
              int updatedCount = 0;
  
              foreach (var doc in documents)
              {
                  var id = doc.GetValue("_id", null);
  
                  if (id == null)
                  {
                      Console.WriteLine("Skipping document without _id");
                      continue;
                  }
  
                  // Replacing with same document will reserialize with Standard Guid format
                  var filter = Builders<BsonDocument>.Filter.Eq("_id", id);
                  await collection.ReplaceOneAsync(filter, doc);
                  updatedCount++;
              }
  
              Console.WriteLine($"✅ Updated {updatedCount} documents in collection: {collectionName}");
          }
  
          Console.WriteLine("Migration complete. All documents now use UuidStandard format for Guids.");
      }
  }
  

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• 

  0

  EngincanV created 21 days ago

  Support Team .NET Developer

  [connect] said: No it doesn't help. I tried to run some small script as follows but still i getting the same error. I dropped my collections in local mongodb then it worked. How can i fix this to my production now?

   
  public static class MongoDBGUIDMigrations 
  { 
      public static async Task Migrate() 
      { 
         BsonSerializer.RegisterSerializer(new GuidSerializer(GuidRepresentation.Standard)); 
   
          var connectionString = "mongodb://localhost:27017"; // Replace as needed 
          var dbName = "your-database-name"; // Replace with your DB name 
   
          var settings = MongoClientSettings.FromConnectionString(connectionString); 
          var client = new MongoClient(settings); 
          var database = client.GetDatabase(dbName); 
   
          // STEP 3: Get all collection names 
          var collections = await database.ListCollectionNamesAsync(); 
          var collectionNames = await collections.ToListAsync(); 
   
          Console.WriteLine($"Found {collectionNames.Count} collections."); 
   
          foreach (var collectionName in collectionNames) 
          { 
              Console.WriteLine($"\n🔄 Processing collection: {collectionName}"); 
   
              // Use BsonDocument to handle dynamic schemas 
              var collection = database.GetCollection<BsonDocument>(collectionName); 
   
              var documents = await collection.Find(FilterDefinition<BsonDocument>.Empty).ToListAsync(); 
   
              int updatedCount = 0; 
   
              foreach (var doc in documents) 
              { 
                  var id = doc.GetValue("_id", null); 
   
                  if (id == null) 
                  { 
                      Console.WriteLine("Skipping document without _id"); 
                      continue; 
                  } 
   
                  // Replacing with same document will reserialize with Standard Guid format 
                  var filter = Builders<BsonDocument>.Filter.Eq("_id", id); 
                  await collection.ReplaceOneAsync(filter, doc); 
                  updatedCount++; 
              } 
   
              Console.WriteLine($"✅ Updated {updatedCount} documents in collection: {collectionName}"); 
          } 
   
          Console.WriteLine("Migration complete. All documents now use UuidStandard format for Guids."); 
      } 
  } 
  

  Hi, to fix this problem, you should say to the driver to use the old format. There is a really good community article that exactly explains how to do that, which you can check at https://abp.io/community/articles/solving-mongodb-guid-issues-after-an-abp-framework-upgrade-tv8waw1n.

  Can you check the article and apply the suggested solution? It should fix your problem.

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  0

  connect created 21 days ago

  @EngincanV Thanks for sharing article. It works now.

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  2