MapsterMapper / MapsterMapper/Mapster
Ignore nullable property does warning CS8603
Open
A pull request for this has already been merged.
- #991 by @DocSvartz — merged
improvement
waiting for info
- Dominant language
- C#
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- 410
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- Merged PRs (30d)
- 6
Description
.Net 7.0 with nullable enabled
public struct Dest
{
public string Name { get; set; }
public string? NullableString { get; set; }
}
public struct Source
{
public string Name { get; set; }
}
public class Mapping : IRegister
{
public void Register(TypeAdapterConfig config)
{
config.NewConfig<Source, Dest>()
.Ignore(d => d.NullableString); // this string a got a warning message CS8603: Possible null reference return
}
}

I think that signature of Ignore method need to be
public TypeAdapterSetter<TSource, TDestination> Ignore(params Expression<Func<TDestination, object?>>[] members);
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by locating the Ignore method signature and reproduce the nullable-enabled C# example from the issue. Review linked pull request #991 for the existing resolution; done means the Ignore call no longer produces warning CS8603.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- csharp
- Domain
- backend-api-design
- Issue type
- Bug
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 25/100