I get this error when using member methods "variable 'r' of type 'MyModel' referenced from scope '', but it is not defined" about nein-linq

[axelheer]

I see. Member methods on models are not supported. Properties on models are, though.

public class MyModel
{
    public string FirstName { get; set; }
    public string LastName { get; set; }

    [InjectLambda]
    public string FullName => FullNameExpr.Compile().Invoke(this);

    public static Expression<Func<MyModel, string>> FullNameExpr => m => $"{m.FirstName} {m.LastName}";
}

[axelheer]

A member method shouldn't be static.

[jesshannon]

Sorry that was a typo while I was trying to work around the issue. The error is still there with a non-static member method.

Here's a more complete demo I've tested in LinqPad, it gives the above error.

using NeinLinq;

void Main()
{
	var result = Users
	.ToEntityInjectable()
	.Select(i => new MyModel {
		FirstName = i.FirstName,
		LastName = i.LastName
	})
	.OrderBy(m => m.GetFullname())
	.Take(1)
	.ToList();		
}

public class MyModel
{
	public string FirstName {get;set;}
	public string LastName {get;set;}
	
    [InjectLambda]
	public string GetFullname() {
		return GetFullnameExpr.Compile().Invoke(this);
	}
	
	public static Expression<Func<MyModel, string>> GetFullnameExpr => (m) => $"{m.FirstName} {m.LastName}";
}