unable to use mapster.sourcegen in .net9

[rendeecpbuild]

[Soundman32]

Same here. During package install I get these errors:

NU1202: Package Mapster.Tool 8.4.2-pre02 is not compatible with net9.0 (.NETCoreApp,Version=v9.0). Package Mapster.Tool 8.4.2-pre02 supports:
  - net8.0 (.NETCoreApp,Version=v8.0) / any
  - net9.0 (.NETCoreApp,Version=v9.0) / any
NU1212: Invalid project-package combination for Mapster.Tool 8.4.2-pre02. DotnetToolReference project style can only contain references of the DotnetTool type 
Package 'Mapster.Tool 8.4.2-pre02' has a package type 'DotnetTool' that is not supported by project 

My project has a target framework of net9.

[andrerav]

Are you trying to add Mapster.Tool as a reference in your project files?

[jjavierdguezas]

trying this today and i can't generate dtos

project structure

C:\path\to\MapsterToolPlayground
│   MapsterToolPlayground.sln
├───.config
│       dotnet-tools.json
└───MapsterToolPlayground
    │   MapsterToolPlayground.csproj
    │   Program.cs
    ├───Domain
    │       Person.cs

dotnet-tools.json

{
  "version": 1,
  "isRoot": true,
  "tools": {
    "mapster.tool": {
      "version": "8.4.0",
      "commands": [
        "dotnet-mapster"
      ],
      "rollForward": false
    }
  }
}

*.csproj

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

	<PropertyGroup>
		<OutputType>Exe</OutputType>
		<TargetFramework>net9.0</TargetFramework>
		<ImplicitUsings>enable</ImplicitUsings>
		<Nullable>enable</Nullable>
	</PropertyGroup>

	<ItemGroup>
		<PackageReference Include="Mapster" Version="7.4.0" />
		<PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
	</ItemGroup>

	<ItemGroup>
		<Generated Include="**\*.g.cs" />
	</ItemGroup>
	<Target Name="CleanGenerated">
		<Delete Files="@(Generated)" />
	</Target>
	<Target Name="Mapster">
		<Exec WorkingDirectory="$(ProjectDir)" Command="dotnet build" />
		<Exec WorkingDirectory="$(ProjectDir)" Command="dotnet tool restore" />
		<Exec WorkingDirectory="$(ProjectDir)" Command="dotnet mapster model -a $(TargetDir)$(ProjectName).dll -n MapsterToolPlayground.Dtos -o Dtos -r" />
		<Exec WorkingDirectory="$(ProjectDir)" Command="dotnet mapster extension -a $(TargetDir)$(ProjectName).dll -n MapsterToolPlayground.Dtos -o Dtos" />
		<Exec WorkingDirectory="$(ProjectDir)" Command="dotnet mapster mapper -a $(TargetDir)$(ProjectName).dll -n MapsterToolPlayground.Mappers -o Mappers" />
	</Target>

</Project>

domain class

using Mapster;
using Newtonsoft.Json;

namespace MapsterToolPlayground.Domain
{
    [AdaptTwoWays("[name]Dto"), GenerateMapper]
    public class Person
    {
        [JsonConstructor]
        public Person()
        {

        }

        public Person(string id, string name, int age, DateTime createdOn = default)
        {
            Id = id;
            Name = name;
            Age = age;
            CreatedOn = createdOn == default ? DateTime.UtcNow : createdOn;
        }

        public string Id { get; protected set; }
        public string Name { get; protected set; }

        public Person SetName(string name)
        {
            Name = name;
            return this;
        }

        public int Age { get; protected set; }

        public Person SetAge(int age)
        {
            Age = age;
            return this;
        }

        public DateTime CreatedOn { get; protected set; }
        public Person SetCreatedOn(DateTime createdOn = default)
        {
            CreatedOn = createdOn == default ? DateTime.UtcNow : createdOn;
            return this;
        }
        public DateTime? UpdatedOn { get; protected set; }
        public Person SetUpdatedOn(DateTime? updatedOn = null)
        {
            UpdatedOn = updatedOn == null ? DateTime.UtcNow : updatedOn;
            return this;
        }
    }
}

Program.cs

namespace MapsterToolPlayground
{
    internal class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello, World!");
        }
    }
}

---

running dotnet msbuild -t:Mapster nothing happens, no output running dotnet mapster model -a .\MapsterToolPlayground\bin\Debug\net9.0\MapsterToolPlayground.dll nothing happens, no output

triying to add Mapster.Tool nuget i get

NU1202: Package Mapster.Tool 8.4.0 is not compatible with net9.0 (.NETCoreApp,Version=v9.0). Package Mapster.Tool 8.4.0 supports:
  - net6.0 (.NETCoreApp,Version=v6.0) / any
  - net7.0 (.NETCoreApp,Version=v7.0) / any
NU1212: Invalid project-package combination for Mapster.Tool 8.4.0. DotnetToolReference project style can only contain references of the DotnetTool type 
Package 'Mapster.Tool 8.4.0' has a package type 'DotnetTool' that is not supported by project 'MapsterToolPlayground'.

What i am doing wrong?

thanks in advance

[jjavierdguezas]

changing in csproj

-		<TargetFramework>net9.0</TargetFramework>
+		<TargetFramework>net7.0</TargetFramework>

and it works, so is this package not compatible with net9.0 ?

[stagep]

Are you using Mapster 7.5.0 and Mapster.Tool 8.5.0?

[jjavierdguezas]

Are you using Mapster 7.5.0 and Mapster.Tool 8.5.0?

@stagep

just what you see in my comment

<PackageReference Include="Mapster" Version="7.4.0" />	

and

   "mapster.tool": {
      "version": "8.4.0",

following the steps in the wiki https://github.com/MapsterMapper/Mapster/wiki/Mapster.Tool

[jjavierdguezas]

Are you using Mapster 7.5.0 and Mapster.Tool 8.5.0?

@stagep

trying to force Mapster 7.5.0 and i get this error

the latest version on https://github.com/MapsterMapper/Mapster/releases are Mapster 7.4.0 and Mapster.Tool 8.4.0

[stagep]

Did you put the Target Framework back to 9.0?

[jjavierdguezas]

Did you put the Target Framework back to 9.0?

yes I did, but I'll try it again later and I'll report back

[jjavierdguezas]

Did you put the Target Framework back to 9.0?

@stagep i don't know where do you get that version, but I cant. could you provide the nuget url? that version isnt listed there 🤷🏻‍♂️

https://www.nuget.org/packages/Mapster#versions-body-tab

[stagep]

My bad. 6 months ago, I had taken a version of Mapster 7.4 / Mapster.Tool 8.4 and loaded on my machine and upgraded these to .Net 9. One of my nuget feeds is to the output of that solution. I had done this because I was having an issue using Mapster.Tools on .Net 9. I would try the latest prerelease versions of both Mapster and Mapster.Tools to see if it works for you on .Net 9. Please let me know either way. Thanks.

[jjavierdguezas]

My bad. 6 months ago, I had taken a version of Mapster 7.4 / Mapster.Tool 8.4 and loaded on my machine and upgraded these to .Net 9. One of my nuget feeds is to the output of that solution. I had done this because I was having an issue using Mapster.Tools on .Net 9. I would try the latest prerelease versions of both Mapster and Mapster.Tools to see if it works for you on .Net 9. Please let me know either way. Thanks.

thanks @stagep for your help

making this changes:

csproj

- 		<TargetFramework>net7.0</TargetFramework>
+		<TargetFramework>net9.0</TargetFramework>

...

-		<PackageReference Include="Mapster" Version="7.4.0" />
+		<PackageReference Include="Mapster" Version="7.4.2-pre02" />

dotnet-tools.json

-       "version": "8.4.0",
+       "version": "8.4.2-pre02",

i can cofirm that the latest pre release version of Mapster and Mapster.Tools work just fine with net9.0

thxs!

[stagep]

Thank you. I had forgotten I was using my own fork so now I will move to the prerelease version and delete my local version.