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  1. C# Driver
  2. CSHARP-4522

Issue with Casting via C# LINQ Statements

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Details

    • Icon: Bug Bug
    • Resolution: Fixed
    • Icon: Unknown Unknown
    • 2.19.1
    • 2.19.0
    • LINQ3
    • None
    • Not Needed
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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

      Creating the issue from forum post: https://www.mongodb.com/community/forums/t/issue-with-2-18-to-2-19-nuget-upgrade-of-mongodb-c-driver/211894/10

       

      The problem is when attempting to cast an object as a particular type in a C# LINQ statement to satisfy the C# compiler and access properties, the mongo driver(according to the person who responded in the forum) is attempting to do a server-side $convert

       

      This just started after upgrading from the C# Nuget 2.18 to 2.19. I've uploaded a simple test solution which demonstrates this. 

       

      I cannot use the following: public static T UpsertThing<T>( IMongoDatabase DB, Expression<Func<T, bool>> filter, T record) where T: AMongoThing

       

      because we potentially cast as multiple different objects depending on the query and security we are attempting to achieve.

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            robert@mongodb.com Robert Stam
            mmann@smartcert.tech Mark Mann
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