Upgrade AutoMapper to support .NET 7

Hi,

This is mainly a FYI for any other developers that are running into issues when trying out Piranha with .NET 7 preview. The precursor here is that I created a simple Piranha project from the piranha.mvc template, and then try to run it with a .NET 7 preview runtime. The following exception is thrown:

Unhandled exception. System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
 ---> System.TypeInitializationException: The type initializer for 'Piranha.Data.EF.Module' threw an exception.
 ---> System.ArgumentException: GenericArguments[0], 'Piranha.Extend.Fields.ImageField', on 'T MaxInteger[T](System.Collections.Generic.IEnumerable`1[T])' violates the constraint of type 'T'.
 ---> System.Security.VerificationException: Method System.Linq.Enumerable.MaxInteger: type argument 'Piranha.Extend.Fields.ImageField' violates the constraint of type parameter 'T'.
   at System.RuntimeMethodHandle.GetStubIfNeeded(RuntimeMethodHandleInternal method, RuntimeType declaringType, RuntimeType[] methodInstantiation)
   at System.Reflection.RuntimeMethodInfo.MakeGenericMethod(Type[] methodInstantiation)
   --- End of inner exception stack trace ---
   at System.RuntimeType.ValidateGenericArguments(MemberInfo definition, RuntimeType[] genericArguments, Exception e)
   at System.Reflection.RuntimeMethodInfo.MakeGenericMethod(Type[] methodInstantiation)
   at AutoMapper.TypeDetails.<>c__DisplayClass28_1.<BuildPublicNoArgExtensionMethods>b__10(MethodInfo extensionMethod)
   at System.Linq.Enumerable.WhereSelectArrayIterator`2.MoveNext()
   at System.Linq.Enumerable.ConcatIterator`1.MoveNext()
   at System.Linq.Enumerable.SelectManyIterator[TSource,TCollection,TResult](IEnumerable`1 source, Func`2 collectionSelector, Func`3 resultSelector)+MoveNext()
   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   at System.Collections.Generic.HashSet`1.UnionWith(IEnumerable`1 other)
   at System.Linq.Enumerable.UnionIterator`1.FillSet()
   at System.Linq.Enumerable.UnionIterator`1.ToArray()
   at AutoMapper.TypeDetails.BuildPublicNoArgExtensionMethods(IEnumerable`1 sourceExtensionMethodSearch)
   at AutoMapper.TypeDetails..ctor(Type type, ProfileMap config)
   at AutoMapper.ProfileMap.TypeDetailsFactory(Type type)
   at AutoMapper.Internal.LockingConcurrentDictionary`2.<>c__DisplayClass2_1.<.ctor>b__1()
   at System.Lazy`1.ViaFactory(LazyThreadSafetyMode mode)
   at System.Lazy`1.ExecutionAndPublication(LazyHelper executionAndPublication, Boolean useDefaultConstructor)
   at System.Lazy`1.CreateValue()
   at AutoMapper.Internal.LockingConcurrentDictionary`2.GetOrAdd(TKey key)
   at AutoMapper.ProfileMap.CreateTypeDetails(Type type)
   at AutoMapper.Configuration.Conventions.NameSplitMember.MapDestinationPropertyToSource(ProfileMap options, TypeDetails sourceType, Type destType, Type destMemberType, String nameToSearch, LinkedList`1 resolvers, IMemberConfiguration parent, Boolean isReverseMap)
   at AutoMapper.Configuration.Conventions.MemberConfiguration.MapDestinationPropertyToSource(ProfileMap options, TypeDetails sourceType, Type destType, Type destMemberType, String nameToSearch, LinkedList`1 resolvers, Boolean isReverseMap)
   at AutoMapper.ProfileMap.MapDestinationPropertyToSource(TypeDetails sourceTypeInfo, Type destType, Type destMemberType, String destMemberInfo, LinkedList`1 members, Boolean reverseNamingConventions)
   at AutoMapper.TypeMapFactory.CreateTypeMap(Type sourceType, Type destinationType, ProfileMap options, Boolean isReverseMap)
   at AutoMapper.ProfileMap.BuildTypeMap(IConfigurationProvider configurationProvider, ITypeMapConfiguration config)
   at AutoMapper.ProfileMap.Register(IConfigurationProvider configurationProvider)
   at AutoMapper.MapperConfiguration.Seal()
   at AutoMapper.MapperConfiguration..ctor(MapperConfigurationExpression configurationExpression)
   at AutoMapper.MapperConfiguration..ctor(Action`1 configure)
   at Piranha.Data.EF.Module..cctor()
   --- End of inner exception stack trace ---
   at Piranha.Data.EF.Module..ctor()
   at System.RuntimeType.CreateInstanceOfT()
   --- End of inner exception stack trace ---
   at System.RuntimeType.CreateInstanceOfT()
   at System.Activator.CreateInstance[T]()
   at Piranha.Runtime.AppModuleList.OnRegister[TValue](AppModule item)
   at Piranha.Runtime.AppDataList`2.Register[TValue]()
   at PiranhaEFExtensions.RegisterServices[T](IServiceCollection services, ServiceLifetime scope)
   at PiranhaEFExtensions.AddPiranhaEF[T](IServiceCollection services, Action`1 dboptions, Int32 poolSize, ServiceLifetime scope)
   at PiranhaEFExtensions.UseEF[T](PiranhaServiceBuilder serviceBuilder, Action`1 dboptions, Int32 poolSize, ServiceLifetime scope)
   at Program.<>c__DisplayClass0_0.<<Main>$>b__0(PiranhaServiceBuilder options) in C:\Projects\ramn-web\src\Ramn.Web.MVC\Program.cs:line 29
   at PiranhaStartupExtensions.AddPiranha(IServiceCollection services, Action`1 options, ServiceLifetime scope)
   at PiranhaHostingExtensions.AddPiranha(WebApplicationBuilder builder, Action`1 options)

This is a known issue since .NET 7.0 preview.5.22258.1. Here are some relevant links:

• First issue posted on dotnet/runtime https://github.com/dotnet/runtime/issues/69119
• Automapper issue: https://github.com/AutoMapper/AutoMapper/issues/3988
• Old proposal from Automapper author to improve CoreFX API: https://github.com/dotnet/runtime/issues/28033
• Automapper pull request: https://github.com/AutoMapper/AutoMapper/pull/3999

The conclusion is that this issue is supposedly fixed in Automapper 11.0.2 which is not released yet.

I’m posting this issue + background information here in case other users happen across this problem while preparing for the upcoming .NET 7 upgrade. Feel free to close this when Automapper 11.0.2 is released and the fix is verified.