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  1. C# Driver
  2. CSHARP-4588

LINQ3 LinqProvider do not support public extension method

    • Type: Icon: Bug Bug
    • Resolution: Duplicate
    • Priority: Icon: Critical - P2 Critical - P2
    • None
    • Affects Version/s: 2.19.0, 2.19.1
    • Component/s: LINQ3
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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?

      Summary

      MongoDB.Driver since version 1.19.0 does not support the extension method inside the Project() method. In version 2.19.1 this still doesn't work. 

      How to Reproduce

      After updating MongoDB.Driver from 2.18.0 to 2.19.1, I got an exception:

       

      MongoDB.Driver.Linq.ExpressionNotSupportedException: Expression not supported: execution.ToExecutionCommonDto().
         at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.MethodCallExpressionToAggregationExpressionTranslator.Translate(TranslationContext context, MethodCallExpression expression)
         at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.ExpressionToAggregationExpressionTranslator.Translate(TranslationContext context, Expression expression)
         at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.ExpressionToAggregationExpressionTranslator.TranslateLambdaBody(TranslationContext context, LambdaExpression lambdaExpression, IBsonSerializer parameterSerializer, Boolean asRoot)
         at MongoDB.Driver.Linq.Linq3Implementation.LinqProviderAdapterV3.TranslateExpressionToProjection[TInput,TOutput](Expression`1 expression, IBsonSerializer`1 inputSerializer, IBsonSerializerRegistry serializerRegistry, ExpressionTranslationOptions translationOptions)
         at MongoDB.Driver.Linq.Linq3Implementation.LinqProviderAdapterV3.TranslateExpressionToFindProjection[TSource,TProjection](Expression`1 expression, IBsonSerializer`1 sourceSerializer, IBsonSerializerRegistry serializerRegistry)
         at MongoDB.Driver.FindExpressionProjectionDefinition`2.Render(IBsonSerializer`1 sourceSerializer, IBsonSerializerRegistry serializerRegistry, LinqProvider linqProvider)
         at MongoDB.Driver.MongoCollectionImpl`1.CreateFindOperation[TProjection](FilterDefinition`1 filter, FindOptions`2 options)
         at MongoDB.Driver.MongoCollectionImpl`1.FindAsync[TProjection](IClientSessionHandle session, FilterDefinition`1 filter, FindOptions`2 options, CancellationToken cancellationToken)
         at MongoDB.Driver.FindFluent`2.ToCursorAsync(CancellationToken cancellationToken)
         at MongoDB.Driver.IAsyncCursorSourceExtensions.ToListAsync[TDocument](IAsyncCursorSource`1 source, CancellationToken cancellationToken) 

      Where the query code looks like this:

       

       

                  return await this.databaseContext.Executions
                      .Find(this.databaseContext.CurrentSession, filterBuilder.And(filters))
                      .Project(execution => execution.ToExecutionCommonDto())
                      .ToListAsync(CancellationToken.None); 

      I use the public extension method ToExecutionCommonDto() that converts the database model to the DTO model:

       

       

      return new ExecutionCommonDto
                  {
                      Id = execution.Id,
                      StartTime = execution.Time?.StartTime,
                      EndTime = execution.Time?.EndTime,
                      Timeout = execution.Time?.Timeout,
                      Status = execution.Status?.Status,
                      Result = execution.ExecutionResult?.Result
                  }; 

      And this code worked in version 1.18.0, but since version 1.19.0 it stopped working and in 1.19.1 they still don't work.

      I'm using MongoDB inside container:

        mongoDb:
          image: bitnami/mongodb:5.0.3
          restart: always
          ports:
            - "27017:27017"
          environment:
            - MONGODB_DATABASE=database
            - MONGODB_USERNAME=user
            - MONGODB_PASSWORD=password
            - MONGODB_ADVERTISED_HOSTNAME=mongoDb
            - MONGODB_REPLICA_SET_MODE=primary
            - MONGODB_ROOT_PASSWORD=password
            - MONGODB_REPLICA_SET_KEY=C1D6B99752EC4929
            - MONGODB_SYSTEM_LOG_VERBOSITY=0
          volumes:
            - mongoDb_volume:/bitnami:rw
          networks:
            - app-network
      
        mongoDb-replica:
          image: bitnami/mongodb:5.0.3
          restart: always
          privileged: true
          environment:
            - MONGODB_ADVERTISED_HOSTNAME=mongoDb-replica
            - MONGODB_REPLICA_SET_MODE=secondary
            - MONGODB_INITIAL_PRIMARY_HOST=mongoDb
            - MONGODB_INITIAL_PRIMARY_PORT_NUMBER=27017
            - MONGODB_INITIAL_PRIMARY_ROOT_PASSWORD=password
            - MONGODB_REPLICA_SET_KEY=C1D6B99752EC4929
            - MONGODB_SYSTEM_LOG_VERBOSITY=0
          depends_on:
            - mongoDb
          networks:
            - app-network  
        mongoDb-arbiter:
          image: bitnami/mongodb:5.0.3
          restart: always
          privileged: true
          environment:
            - MONGODB_ADVERTISED_HOSTNAME=mongoDb-arbiter
            - MONGODB_REPLICA_SET_MODE=arbiter
            - MONGODB_INITIAL_PRIMARY_HOST=mongoDb
            - MONGODB_INITIAL_PRIMARY_PORT_NUMBER=27017
            - MONGODB_INITIAL_PRIMARY_ROOT_PASSWORD=password
            - MONGODB_REPLICA_SET_KEY=C1D6B99752EC4929
            - MONGODB_SYSTEM_LOG_VERBOSITY=0
          depends_on:
            - mongoDb
          networks:
            - app-network 

       

            Assignee:
            robert@mongodb.com Robert Stam
            Reporter:
            wojciech.nagorski@intel.com Wojciech Nagorski
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              Created:
              Updated:
              Resolved: