Hi,

Am I misunderstanding something here. Is it not allowed to have (static) methods in DO4 Classes? I added a 'CheckUser' method to my User Class and now Postsharp gives me an exception. Is this by desing or a bug?

Regards Paul Sinnema Diartis AG

Here is the code

using System;
using Xtensive.Storage;
using System.Linq;

namespace AnyMatrixModel
{
    enum SecurityLevel
    {
        Guest,
        User,
        Editor,
        Administrator
    }

    [Serializable]
    public class User : AbstractEntity
    {
        [Field(Length=Int32.MaxValue)]
        public string FirstName { get; set; }

        [Field(Length=Int32.MaxValue)]
        public string LastName { get; set; }

        [Field(Length = Int32.MaxValue)]
        public string UserId { get; set; }

        [Field(Length = Int32.MaxValue)]
        public string Password { get; set; }

        [Field]
        public int SecurityLevel { get; set; }

        public static bool CheckUser(string userId, string password, out string message)
        {
            message = string.Empty;

            var q = from usr in Query.All<User>()
                    where usr.UserId == userId
                    && usr.Password == password
                    select usr;

            User user = q.FirstOrDefault();

            if (user == null)
            {
                message = "UserId or Password is wrong";
                return false;
            }

            return true;
        }
    }
}

And here is the exception.

Error   1   Unhandled exception (2.0.5.1205, 64 bit, CLR 4.0, Release): System.InvalidOperationException: Operation is not valid due to the current state of the object.
   at PostSharp.AspectWeaver.Transformations.ArgumentsWriter.^C0S6plPn.EmitStoreByRefArgument(Int32 _0, InstructionWriter _1, Action`1 _2)
   at ^1gq46AVh1jKu.^/1JyDPoZ5pES.^h4HWFf13.^MNbxG17j(ArgumentsWriter _0, MethodMappingWriter _1, InstructionWriter _2)
   at ^1gq46AVh1jKu.^/1JyDPoZ5pES.^h4HWFf13.WeaveOnException(InstructionBlock _0, ITypeSignature _1, InstructionWriter _2)
   at PostSharp.AspectInfrastructure.Helpers.MethodBodyWrappingImplementation.Implement(Boolean hasOnEntry, Boolean hasOnSuccess, Boolean hasOnExit, ITypeSignature[] exceptionTypes)
   at ^1gq46AVh1jKu.^/1JyDPoZ5pES.^h4HWFf13.^r4DISfQ8()
   at ^1gq46AVh1jKu.^/1JyDPoZ5pES.Implement(MethodBodyTransformationContext _0)
   at ^j1TTpdjykhlv.^LuETqvLKzZPB(MetadataDeclaration _0, MetadataDeclaration _1, MethodSemantics _2, InstructionBlock _3, Object[] _4, CanonicalMethodMapping _5, LocalVariableSymbol _6, InstructionSequence _7, TypeDefDeclaration _8, PipelineTransversalState _9)
   at ^MznFwdI/QV4L.^HvVDHXOj(MetadataDeclaration _0, IDependencyTransformationInstance[] _1, PipelineTransversalState _2, MethodSemantics _3)
   at PostSharp.AspectInfrastructure.AspectInfrastructureTask.^jwku0geZ(MetadataDeclaration _0, PipelineTransversalState _1, MethodSemantics _2, Boolean _3)
   at PostSharp.AspectInfrastructure.AspectInfrastructureTask.^jwku0geZ(IMetadataDeclaration _0, PipelineTransversalState _1, MethodSemantics _2)
   at PostSharp.AspectInfrastructure.StructuredDeclarationDictionary`1.^d+wOzSPF(IMetadataDeclaration _0, Func`2 _1)
   at PostSharp.AspectInfrastructure.StructuredDeclarationDictionary`1.^+g+TCqVg(TypeDefDeclaration _0, Func`2 _1, Set`1 _2)
   at PostSharp.AspectInfrastructure.StructuredDeclarationDictionary`1.^fJqG(Func`2 _0)
   at PostSharp.AspectInfrastructure.AspectInfrastructureTask.Execute()
   at PostSharp.Extensibility.Project.ExecutePhase(String phase)
   at PostSharp.Extensibility.Project.Execute()
   at PostSharp.Hosting.PostSharpObject.ExecuteProjects()
   at PostSharp.Hosting.PostSharpObject.InvokeProject(ProjectInvocation projectInvocation)  C:\Users\Paul\Documents\Visual Studio 2010\Projects\AnyMatrix\AnyMatrixModel\POSTSHARP  AnyMatrixModel

Updated at 22.06.2010 16:16:24

Advice from functional programming: avoid out and ref parameters;

Works just fine:

Regards Paul Sinnema Diartis AG

using System;
using Xtensive.Storage;
using System.Linq;
using AnyMatrixModel.Exceptions;

namespace AnyMatrixModel
{
    enum SecurityLevel
    {
        Guest,
        User,
        Editor,
        Administrator
    }

    [Serializable]
    public class User : AbstractEntity
    {
        [Field(Length=Int32.MaxValue)]
        public string FirstName { get; set; }

        [Field(Length=Int32.MaxValue)]
        public string LastName { get; set; }

        [Field(Length = Int32.MaxValue)]
        public string UserId { get; set; }

        [Field(Length = Int32.MaxValue)]
        public string Password { get; set; }

        [Field]
        public int SecurityLevel { get; set; }

        /// <summary>
        /// Finds the User with UserId and Password and returns the User object
        /// </summary>
        /// <param name="userId"></param>
        /// <param name="password"></param>
        /// <returns></returns>
        public static User CheckUser(string userId, string password)
        {
            var q = from usr in Query.All<User>()
                    where usr.UserId == userId
                    && usr.Password == password
                    select usr;

            User user = q.FirstOrDefault();

            if (user == null)
            {
                throw new LoginFailedException("UserId or Password is wrong");
            }

            return user;
        }
    }
}

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