[swift-users] Decode a JSON object of unknown format into a Dictionary with Decodable in Swift 4

[Rien]

Dang, hit send too soon. Sorry.

This does not address your question, so please ignore… (foot in mouth)!

Regards,
Rien

Site: http://balancingrock.nl
Blog: http://swiftrien.blogspot.com
Github: http://github.com/Balancingrock
Project: http://swiftfire.nl - An HTTP(S) web server framework in Swift







> On 18 Jun 2017, at 09:19, Rien <Rien at Balancingrock.nl> wrote:
> 
> Are you looking for a general purpose JSON interpreter / API ?
> 
> There are many of them around, and in fact I do have my own: https://github.com/Balancingrock/VJson
> 
> With VJson I would write:
> 
> let json = VJson.parse(… your json object…)
> 
> and then access the metadata as:
> 
> let buyCount = (json | ”metadata” | ”buy_count”)?.intValue
> 
> or:
> 
> var buyCount: Int &= json | “metadata” | “buy_count”
> 
> To loop over the content of metadata:
> 
> for item in (json | “metadata”) ?? [ ] {
> 	print (item.nameValue)
> 	switch item.type {
> 	case .object: …
> 	case .number: …
> 	case .string: …
> 	etc...
> 	}
> }
> 
> Obviously I am plugging my own code here, but there are many others around, I understand that SwiftyJSON is quite popular but I have not used that myself.
> 
> Regards,
> Rien
> 
> Site: http://balancingrock.nl
> Blog: http://swiftrien.blogspot.com
> Github: http://github.com/Balancingrock
> Project: http://swiftfire.nl - An HTTP(S) web server framework in Swift
> 
> 
> 
> 
> 
> 
> 
>> On 18 Jun 2017, at 04:07, Chris Anderson via swift-users <swift-users at swift.org> wrote:
>> 
>> Say I have a JSON object such as:
>> 
>>  {
>>    "id": "4yq6txdpfadhbaqnwp3",
>>    "email": "john.doe at example.com",
>>    "name":"John Doe",
>>    "metadata": {
>>      "link_id": "linked-id",
>>      "buy_count": 4
>>    }
>>  }
>> 
>> And with a struct of:
>> 
>> struct User: Codable {
>>  var id: String
>>  var email: String
>>  var name: String
>> }
>> 
>> How can I decode the `metadata` field into a Dictionary?
>> 
>> I’ve tried doing things such as, in my struct,
>> 
>> var metadata: Dictionary
>> 
>> or
>> 
>> var metadata: [String: Any]
>> 
>> But I get the error 
>> 
>> MyPlayground.playground:3:7: note: cannot automatically synthesize 'Encodable' because '<<error type>>' does not conform to 'Encodable'
>>  var metadata: Dictionary 
>> 
>> A meta or metadata field on many APIs (such as www.stripe.com) can contain whatever you want, and I still want to be able to process it on the Swift end. How can I store that meta data field into a Dictionary that I can parse apart manually after?
>> 
>> Thanks!
>> 
>> Chris Anderson
>> 
>> 	
>> 
>> 
>> 
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>