Validate 2 lists using FluentValidation

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甜味超标
甜味超标 2021-02-10 04:21

if anyone has much experience using [C#] FluentValidation and has any ideas for the below question any help would be much appreciated.

I have 2 Generic Lists (both with

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  • 2021-02-10 05:00

    I ended up using the following FluentValidation code to check the corrosponding items in each list, big thanks to Guvante as it was inspired by his Pseudo-code :)

    RuleFor(f => f.Names).Must((f, d) =>
                {
                    for (int i = 0; i < d.Count; i++)
                    {
                        if ((String.IsNullOrEmpty(d[i]) &&
                             !String.IsNullOrEmpty(f.URLs[i])))
                            return false;
                    }
    
                    return true;
                })
                .WithMessage("Names cannot be empty.");
    
                RuleFor(f => f.URLs).Must((f, u) =>
                {
                    for (int i = 0; i < u.Count; i++)
                    {
                        if ((String.IsNullOrEmpty(u[i]) &&
                             !String.IsNullOrEmpty(f.Names[i])))
                            return false;
                    }
    
                    return true;
                })
                .WithMessage("URLs cannot be empty.");
    
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  • 2021-02-10 05:03

    Here is some Pseudo-code of a brute force solution. (I cannot think of any LINQ way of doing indexed comparisions) Sorry for the butchering of Fluent syntax.

    Must(Names.Length == URLs.Length).WithMessage("Names must be equal in size to URLs");
    for (int i = 0; i < Name.Length; i++)
    {
        Must(string.IsNullOrEmpty(Names[i]) ^^ string.IsNullOrEmpty(URLs[i])).WithMessage("Either Name and URL must be non-empty, or both must be empty, index = " + i);
    }
    

    Hopefully you get the gist of it, you may also want to look into general LINQ methods, there is likely one that I missed. Basically you are wanting to do a join, and then check for invalid results in the merged list, but again I am unsure how to do a row by row and not simply a many to many join.

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