feat: allow adding attribute via a context function

[teleivo]

Context keys should be kept private to avoid collisions with other packages https://pkg.go.dev/context#Context.Value. WithContextFunc allows you to add slog.Attrs with slog.Values from the context.Context in such situations.

Implements #24

[teleivo]

@orandin in

slog-gorm/options.go

Line 81 in d0ef590

l.contextKeys = make(map[string]string, 0)

the map is made with space for 0 elements https://pkg.go.dev/builtin#make. Do you know why? I can do so as well, but I don't think we should since we will add one element within the WithContextFunc and WithContextValue. Maybe I am missing something 🤔

[teleivo]

@orandin could you please have a look at the PR, thanks a lot!

[teleivo]

@orandin could you please review the PR. Thanks a lot!

[orandin]

Sorry for the delay, I'm going to review the PR this week

[orandin]

@orandin in

slog-gorm/options.go

Line 81 in d0ef590

l.contextKeys = make(map[string]string, 0)

the map is made with space for 0 elements https://pkg.go.dev/builtin#make. Do you know why? I can do so as well, but I don't think we should since we will add one element within the WithContextFunc and WithContextValue. Maybe I am missing something 🤔

Indeed, it is redundant size hint. We can remove the size.

Nice contribution! I'm going to merge this PR.
Thank you @teleivo for your contribution and for your patience.

[teleivo]

@orandin in

slog-gorm/options.go

Line 81 in d0ef590

l.contextKeys = make(map[string]string, 0)

the map is made with space for 0 elements https://pkg.go.dev/builtin#make. Do you know why? I can do so as well, but I don't think we should since we will add one element within the WithContextFunc and WithContextValue. Maybe I am missing something 🤔

Indeed, it is redundant size hint. We can remove the size.

Nice contribution! I'm going to merge this PR. Thank you @teleivo for your contribution and for your patience.

Thank you @orandin 🥳