filed https://github.com/golang/go/issues/62699 and expect any further
discussion will happen there.
On Monday, September 11, 2023 at 1:45:55 PM UTC-4 Jonathan Amsterdam wrote:
> Hi Steve,
> I'm not sure what the right answer is. Can you file this as a bug on
> go.dev/issues?
>
> On Thursday, September 7, 2023 at 2:30:09 PM UTC-4 Steven Pelley wrote:
>
>> Hi everyone,
>>
>> Possibly a bug or potential improvement in slog.
>> This will sound excessively complicated, which I recognize and have
>> changed my approach. Regardless, I see an opportunity to improve
>> surprising behavior.
>> I'm looking for feedback on whether I missed something in the slog
>> documentation or if this is a valid bug or improvement, in which case I can
>> file it.
>>
>> slog.Value always json.marshals to an empty document, "{}", which to me
>> was surprising behavior when using JsonHandler. If a slog.Value is
>> embedded in a logged non-slog.Value, for example a slice, it will
>> effectively omit data. On the other hand any tree of Values and Attrs
>> passed directly to the log functions, without an intervening non-slog.Value
>> object, marshals and logs properly. I expect a slice, or any other
>> non-slog.Value type, containing an slog.Value to marshal to json with the
>> slog.Value's represented value.
>>
>> Alternatively, the slog documentation (or specifically JsonHandler) could
>> state that no non-slog.Value object passed to a log method may contain an
>> slog.Value, and that LogValuers must maintain this invariant.
>>
>> go1.21.0 darwin/arm64
>> demonstration
>>
>> I discovered this when logging (using JsonHandler) an object containing a
>> list of objects whose logged data I wanted to redact/reduce. I do this as
>> a LogValuer whose LogValue function constructs and returns a new
>> slog.GroupValue with a []slog.Value containing the redacted objects for
>> logging. Each Value is created by in turn calling
>> Value.Resolve(Value.anyValue(...)) on the component items. The resulting
>> log contains a list of empty documents. I think this is a reasonable use
>> of LogValue, though I recognize that many people will suggest not logging
>> slices.
>>
>> Thanks,
>> Steve
>>
>>
>>
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