[swift-evolution] JSONEncoder: Key strategies

[Eagle Offshore]

I have to agree, would be better to allow one to provide a mapping dictionary or delegate.  Building the encodingKeys into the class itself is short sighted and a half measure.

Different types of codings will necessarily desire different key sets and even different names for what are logically the same keys.  This absolutely should NOT be baked into the class that implements Codable but rather maybe a delegate that is presented each key/value and given an opportunity to provide a substitute key and value.

Codable is a fairly useless one trick pony in its current incarnation.  It doesn't really solve any problem I have with respect to interacting with web services.

> On Nov 7, 2017, at 2:50 PM, Mike Kluev via swift-evolution <swift-evolution at swift.org> wrote:
> 
> a big fat -1. sorry.
> 
> imho, this is barking up the wrong tree and things like converting from camel case / snake case / removal underscores/ capitalization / etc, etc shall not be part of foundation. even if people in the labs asking for that. third party library - probably.
> 
> more easy way to handle keys customization would be nice, last i checked it was "all or nothing", whenever i wanted to customise a single key i had to do them all and the source tripled in size. something simple to avoid that would be enough, imho.
> 
> Mike
> 
> on Mon, 06 Nov 2017 12:54:38 -0800 Tony Parker <anthony.parker at apple.com <mailto:anthony.parker at apple.com>> wrote:
> 
> Hi everyone,
> 
> While we have no formal process at this time for proposals of changes to Foundation-only code, I would still like to post one that we have run through our internal process here for additional public comment.
> 
> Link to PR with proposal content:
> 
> https://github.com/apple/swift-corelibs-foundation/pull/1301 <https://github.com/apple/swift-corelibs-foundation/pull/1301>
> 
> Link to implementation for the overlay:
> 
> https://github.com/apple/swift/pull/12779 <https://github.com/apple/swift/pull/12779> <https://github.com/apple/swift/pull/12779 <https://github.com/apple/swift/pull/12779>>
> 
> Markdown follows.
> 
> Thanks,
> - Tony
> 
> # Key Strategies for JSONEncoder and JSONDecoder
> 
> * Proposal: SCLF-0001
> * Author(s): Tony Parker <anthony.parker at apple.com <mailto:anthony.parker at apple.com>>
> 
> ##### Related radars or Swift bugs
> 
> * <rdar://problem/33019707> Snake case / Camel case conversions for JSONEncoder/Decoder
> 
> ##### Revision history
> 
> * **v1** Initial version
> 
> ## Introduction
> 
> While early feedback for `JSONEncoder` and `JSONDecoder` has been very positive, many developers have told us that they would appreciate a convenience for converting between `snake_case_keys` and `camelCaseKeys` without having to manually specify the key values for all types
> .....
>  
> _______________________________________________
> swift-evolution mailing list
> swift-evolution at swift.org
> https://lists.swift.org/mailman/listinfo/swift-evolution

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.swift.org/pipermail/swift-evolution/attachments/20171111/2dd1a369/attachment.html>