Parse Nested Object using Object Mapper in Swift 4

Question

I have JSON response like below

{
    "XYZ": {
        "ABC": {
            "PQR": [
                {
                    "details": {
                        "date":1221,
                        "number": 30
                    }
                }
            ]
        }
    }
}

I want to fetch the details of "date" and "number" directly. without parsing separately XYZ, ABC,PQR AND details.

struct Trial: Mappable {
    var PQR!
    init() {}
    init?(map: Map) {}

    mutating func mapping(map: Map) {
        trialPeriod <- map["XYZ.ABC.PQR"]    
    }
}

I am to parse till PQR. After that, I am not able to parse. Could you please let me know how to get "details" after parsing till PQR??

OR

Let me know how to get the parse directly to a number? I tried many times but could not able to do so.

user9335240 · Accepted Answer · 2019-03-01 10:54:07Z

2

You couldn't parse nested after the PQR just because it is a JSON Array not a JSON Object. So, you can do something like that if you are sure that it is the first element of the array only.

struct Trial: Mappable {
    var PQR!
    init() {}
    init?(map: Map) {}

    mutating func mapping(map: Map) {
        trialPeriod <- map["XYZ.ABC.PQR.0.details.date"]
    }
}

Notice the .0, it means the first item in the array.

Or, the better, is trying to parse XYZ.ABC.PQR as an array, then parse individual items in it

answered Mar 1, 2019 at 10:54

user9335240

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1 Comment

Sanoj Kashyap Over a year ago

Thanks Buddy!! I was keep trying before posted like map["XYZ.ABC.PQR[0].details.date"] :D

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