How to make Include specific field in IList in MongoDbDriver-CodePudding

I want to understand how I can make Include a specific field from List in MongoDBdriver (any solutions)

When i try to Include some property For example:

  var projection = Builders <SomeClass> .Projection
  .Include (x => x.Id)

Its works without any problems.

But when i tryed to include a specific field from a sheet

 var projection = Builders <SomeClass> .Projection
.Include (x => x.ListOfSomeClasses.Select (x => x.SomeProperty))

I get this exception

  Error occurred during request execution
System.InvalidOperationException: Unable to determine the serialization information for x => x.ListOfSomeClasses.Select (x => x.SomeProperty).

Before that, I worked with postgres and there were no such problems there.

Perhaps there are some problems in Mongo with this. Any answers very helps me. Thank you

CodePudding user response：

c# driver allows using a raw MQL for LINQ queries that are not supported in typed way:

var projection = Builders<SomeClass>.Projection
   .Include("ListOfSomeClasses.SomeProperty");