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  1. C# Driver
  2. CSHARP-4858

Provide a way to test if a field exists or is missing in a LINQ query

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    • Type: Icon: New Feature New Feature
    • Resolution: Done
    • Priority: Icon: Unknown Unknown
    • 2.24.0
    • Affects Version/s: 2.22.0
    • Component/s: LINQ3
    • Labels:
      None
    • Fully Compatible
    • 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?

      Document Mql Exists, IsMissing and IsNullOrMissing methods.

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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? Document Mql Exists, IsMissing and IsNullOrMissing methods.

      Possible API is:

      Mql.Exists(<field expression>) 
// and 
Mql.IsMissing(<field expression>)
// and
Mql.IsNullOrMissing(<field expression>)

      Possible translations are:

      { $ne : [{ $type : "$field" }, "missing"] }
// and
{ $eq : [{ $type : "$field" }, "missing"] }
// and
{ $in : [{ $type : "$field" }, ["null", "missing"]] }

            Assignee:
            robert@mongodb.com Robert Stam
            Reporter:
            robert@mongodb.com Robert Stam
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              Created:
              Updated:
              Resolved: