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  1. C# Driver
  2. CSHARP-4930

ExpressionNotSupportedException thrown when .First() is used with a predicate when building SortDefinition

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    • Icon: Bug Bug
    • Resolution: Works as Designed
    • Icon: Unknown Unknown
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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?

    Description

      Summary

      ExpressionNotSupportedException thrown when .First() is used with a predicate when building SortDefinition.

      Using 2.19.1 driver with 5.0.23 server.

      How to Reproduce

      SortDefinition<Order> sortDefinition1 = Builders<Order>.Sort.Ascending(c => c.Items.First(x => x.Type == "XYZ").Rate);
      SortDefinition<Order> sortDefinition2 = Builders<Order>.Sort.Ascending(c => c.Items.First().Rate);

      The first one throws an exception when executed but the second one works as expected.

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            robert@mongodb.com Robert Stam
            ranasahmed@outlook.com Rana Ahmed
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