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  1. Realm .NET SDK
  2. RNET-1024

[ NativeAot ] Improve support

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      Problem

      Currently attempt to use NativeAot leads to "Unhandled Exception: System.InvalidOperationException: No properties in Item, has linker stripped it?" exception. Expectedly, adding Preserve attribute has no effect in this case.

      MCVE (RealmAot1)

      csproj:

      <Project Sdk="Microsoft.NET.Sdk">

	<PropertyGroup>
		<OutputType>Exe</OutputType>
		<TargetFramework>net7.0</TargetFramework>
		<ImplicitUsings>enable</ImplicitUsings>
		<Nullable>enable</Nullable>
		<PublishAot>true</PublishAot>
	</PropertyGroup>

	<ItemGroup>
		<PackageReference Include="Realm" Version="11.3.0" />
	</ItemGroup>
</Project>

      cs:

      Unable to find source-code formatter for language: cs. Available languages are: actionscript, ada, applescript, bash, c, c#, c++, cpp, css, erlang, go, groovy, haskell, html, java, javascript, js, json, lua, none, nyan, objc, perl, php, python, r, rainbow, ruby, scala, sh, sql, swift, visualbasic, xml, yaml
      using MongoDB.Bson;
using Realms;

var config = new RealmConfiguration("Realm1.realm")
{
    Schema = new[]
    {
        typeof(Item)
    }
};
var realm = Realm.GetInstance(config);
var id = new ObjectId("64bb9508e033d8cfa91e66d3");
var item = realm.Find<Item>(id);
if (item is null)
{
    var testItem = new Item
    {
        Id = id,
        Name = "Do this thing",
        Status = "Open",
        Assignee = "Aimee"
    };
    realm.Write(() =>
    {
        item = realm.Add(testItem);
        Console.WriteLine($"[ Added ] {item.Name} : {item.Status} > {item.Assignee}");
    });
}
else
{
    Console.WriteLine($"{item.Name} : {item.Status} > {item.Assignee}");
}

public partial class Item : IRealmObject
{
    [PrimaryKey]
    [MapTo("_id")]
    public ObjectId Id { get; set; } = ObjectId.GenerateNewId();
    [MapTo("assignee")]
    public string? Assignee { get; set; }
    [MapTo("name")]
    public string? Name { get; set; }
    [MapTo("status")]
    public string? Status { get; set; }
}

      Workaround: add the assembly to custom rd

      add to csproj

      	<ItemGroup>
		<RdXmlFile Include="Custom.rd.xml" />
	</ItemGroup>

      Custom.rd.xml

      <Directives>
	<Application>
		<Assembly Name="RealmAot1" Dynamic="Required All" />
	</Application>
</Directives>

      After that works good! But using rd is considered as bad practice, ideally it should just work.

      Also, generating native code step produces some warnings:

        Generating native code
\realm\11.3.0\lib\net6.0\Realm.dll : warning IL2104: Assembly 'Realm' produced trim warnings. For more information see https://aka.ms/dotnet-illink/libraries
\mongodb.bson\2.19.1\lib\netstandard2.1\MongoDB.Bson.dll : warning IL3053: Assembly 'MongoDB.Bson' produced AOT analysis warnings.
\mongodb.bson\2.19.1\lib\netstandard2.1\MongoDB.Bson.dll : warning IL2104: Assembly 'MongoDB.Bson' produced trim warnings. For more information see https://aka.ms/dotnet-illink/libraries
\runtime.win-x64.microsoft.dotnet.ilcompiler\7.0.8\framework\System.Linq.Expressions.dll : warning IL3053: Assembly 'System.Linq.Expressions' produced AOT analysis warnings.

      How important is this improvement for you?

      Would be a major improvement

      Feature would mainly be used with

      Local Database only

            Assignee:
            Unassigned Unassigned
            Reporter:
            unitosyncbot Unito Sync Bot
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              Created:
              Updated: