[ NativeAot ] Improve support #3417
Description
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:
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