Scaffolding doesn't work with the latest version of Mono.TextTemplating

[testirme]

When I updated all versions to 8, T4 started giving the following error.

error : The type 'Microsoft.EntityFrameworkCore.Metadata.IModel' of the parameter 'Model' did not match the type passed to the template

error : The host parameter 'Model' could not be converted to the type 'System.CodeDom.CodeTypeReference' specified in the template

error : Error running transform: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
 ---> System.BadImageFormatException: Could not load file or assembly 'Microsoft.Extensions.DependencyInjection.Abstractions, Version=8.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'. Reference assemblies cannot be loaded for execution. (0x80131058)
File name: 'Microsoft.Extensions.DependencyInjection.Abstractions, Version=8.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60' ---> System.BadImageFormatException: Could not load file or assembly 'Microsoft.Extensions.DependencyInjection.Abstractions, Version=8.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60, processorArchitecture=MSIL'. Reference assemblies cannot be loaded for execution. (0x80131058)
File name: 'Microsoft.Extensions.DependencyInjection.Abstractions, Version=8.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60, processorArchitecture=MSIL' ---> System.BadImageFormatException: Cannot load a reference assembly for execution.
   at System.Runtime.Loader.AssemblyLoadContext.LoadFromAssemblyPath(String assemblyPath)
   at Mono.TextTemplating.TemplateAssemblyLoadContext.Load(AssemblyName assemblyName) in /_/Mono.TextTemplating/Mono.TextTemplating/TemplateAssemblyLoadContext.cs:line 64
   at System.Runtime.Loader.AssemblyLoadContext.ResolveUsingLoad(AssemblyName assemblyName)
   at System.Runtime.Loader.AssemblyLoadContext.Resolve(IntPtr gchManagedAssemblyLoadContext, AssemblyName assemblyName)
   at Microsoft.VisualStudio.TextTemplating3837c1b.GeneratedTextTransformation.TransformText()
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
   --- End of inner exception stack trace ---
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
   at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters)
   at Mono.TextTemplating.CompiledTemplate.TemplateProcessor.CreateAndProcess(ITextTemplatingEngineHost host, CompiledAssemblyData templateAssemblyData, String templateAssemblyFile, String fullName, CultureInfo culture, String[] referencedAssemblyFiles) in /_/Mono.TextTemplating/Mono.TextTemplating/CompiledTemplate.TemplateExecutor.cs:line 78

Processing 'D:\AKINSOFT\cloud\erpcloud\Libraries\Asnet.Cloud.Data\CodeTemplates\EFCore\DbContext.t4' failed.

[risperdal]

Same here.
I updated all the related ef packages, i updated my t4 templates based on Microsoft.EntityFrameworkCore.Templates .
But the problem is same.
If i remove t4 templates, scaffold is generated correctly.

I am using postgresql.

[ajcvickers]

@risperdal Please post your csproj file.

[akinsoftyazilim42]

@risperdal Please post your csproj file.

hello, I have the same problem. the content of my csproj file is as follows. I would be grateful if you can help what we need to do.

Asnet.Cloud.Data.csproj.zip

[ErikEJ]

@akinsoftyazilim42 You are not using the version 8 packages:

    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="7.0.9">
    </PackageReference>
    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="7.0.4" />
    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL.Design" Version="1.1.0" />

[akinsoftyazilim42]

I'm very sorry. I had taken it back. Now I'm sending you the problematic version.
Asnet.Cloud.Data.csproj.zip

[ajcvickers]

@akinsoftyazilim42 Remove Npgsql.EntityFrameworkCore.PostgreSQL.Design. It's an obsolete package.

[testirme]

@akinsoftyazilim42 Remove Npgsql.EntityFrameworkCore.PostgreSQL.Design. It's an obsolete package.

We uninstalled the Npgsql.EntityFrameworkCore.PostgreSQL.Design package, but the error still persists.

[akinsoftyazilim42]

@akinsoftyazilim42 Remove Npgsql.EntityFrameworkCore.PostgreSQL.Design. It's an obsolete package.

yes. i tried it and now i get the same error.

[Stroomtang]

Same error here, without using any PostgreSQL libraries.
Used the Upgrade-function of Visual Studio to update my .NET 7 project to .NET 8. Found out that now SQL Date objects are mapped to DateOnly, wanted to change this using a T4 template as shown here, but I get these errors when trying to scaffold my existing DB tables:

error : The type 'Microsoft.EntityFrameworkCore.Metadata.IModel' of the parameter 'Model' did not match the type passed to the template

error : The host parameter 'Model' could not be converted to the type 'System.CodeDom.CodeTypeReference' specified in the template
error : Error running transform: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
 ---> System.MissingMethodException: Method not found: 'System.String Microsoft.EntityFrameworkCore.ScaffoldingModelExtensions.GetDbSetName(Microsoft.EntityFrameworkCore.Metadata.IReadOnlyEntityType)'.
   at Microsoft.VisualStudio.TextTemplating752bc159.GeneratedTextTransformation.TransformText()
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
   --- End of inner exception stack trace ---
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
   at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters)
   at Mono.TextTemplating.CompiledTemplate.TemplateProcessor.CreateAndProcess(ITextTemplatingEngineHost host, CompiledAssemblyData templateAssemblyData, String templateAssemblyFile, String fullName, CultureInfo culture, String[] referencedAssemblyFiles) in /_/Mono.TextTemplating/Mono.TextTemplating/CompiledTemplate.TemplateExecutor.cs:line 78

Attached is my .csproj-file: Projectfile.zip

[ErikEJ]

Have you tried with a clean set of the latest t4 templates?

[Stroomtang]

Have you tried with a clean set of the latest t4 templates?

I did, I didn't use templates before (didn't need it) so they are the latest. The DbContext.t4 starts (after the imports) with

if (!ProductInfo.GetVersion().StartsWith("8.0"))

[testirme]

The cause of the error is "Microsoft.VisualStudio.Web.CodeGeneration.Design"

[akinsoftyazilim42]

Thanks for info. ;)