Swift 4 Decodable - array with objects

Question

I'm consuming an API that looks like very similar to this:

{
   "email": "[email protected]",
   "settings": [
        {
            "setting_A": {
                "value": -65,
            }
        },
        {
            "setting_B": {
                "value": {
                    "b1": {
                        "val": 12,
                        "unit": "kg"
                    },
                    "b2": {
                        "val": 10,
                        "unit": "g"
                    }
                }
            }
        }
    ]
}

I'm stuck on decoding this JSON result esp. settings. Can someone help me how to?

This is what I have so far:

struct User: Decodable  {
  let email: String
  let settings: [Setting] // not sure how to do this :(
}

Are the keys inside settings always constant? Do the values corresponding to specific keys always have the same form? If not, do you know all possible keys and all possible values? — David Pasztor
– David Pasztor, Commented Feb 18, 2018 at 23:34
@DávidPásztor Yes, the keys and values are always consistent. No dynamically added keys or values. — ashokgelal
– ashokgelal, Commented Feb 18, 2018 at 23:42
@ashokgelal you can convert your json to model class here app.quicktype.io/#l=swift — Prashant Tukadiya
– Prashant Tukadiya, Commented Feb 19, 2018 at 5:05
@PrashantTukadiya Wow! I wish I knew this tool before. Just saved me few extra hours. Thanks a bunch! — ashokgelal
– ashokgelal, Commented Feb 19, 2018 at 18:23

ashokgelal · Accepted Answer · 2018-02-19 18:45:55Z

8

After spending few hours, I ended up using https://app.quicktype.io/#l=swift as suggested by @PrashantTukadiya and got it all done in under 5 minutes. I highly recommend using that tools for your encoding/decoding needs.

answered Feb 19, 2018 at 18:45

ashokgelal

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2 Comments

kiwisip Over a year ago

I also recommend to use this Xcode extension: github.com/quicktype/quicktype-xcode

Eric Aya Over a year ago

This site uses Data(contentsOf: url) inside the model to get data from the network, which is an abomination. Otherwise, yeah, such a site could be useful, sure.

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