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jsonswiftintswift4codable
Shaobai Li
Shaobai Li

Reputation: 11

Swift 4 codable: the keys are Int array in JSON data

{
  "0": {
    "name": "legaldoc.pdf",
    "cmisid": "yib5C-w92PPtxTBlXl4UJ8oDBthDtAU9mKN5kh2_KrQ"
  },
  "1": {
    "name": "persdoc.pdf",
    "cmisid": "dqAnrdNMXGTz1RbOMI37OY6tH9xMdxiTnz6wEl2m-VE"
  },
  "2": {
    "name": "certdoc.pdf",
    "cmisid": "6d7DuhldQlnb0JSjXlZb9mMOjxV3E_ID-ynJ0QRPMOA"
  }
}

How do I use Swift 4 Codable to parse JSON data like that? the problem is that the keys are Int array. How do I set CodingKeys for this?

Upvotes: 1

Views: 935

Answers (1)

vadian
vadian

Reputation: 285059

As mentioned in the comments there is no array. All collection types are dictionaries.

You can decode it as Swift dictionary. To get an array map the result to the values of the sorted keys

let jsonString = """
{
    "0": {
        "name": "legaldoc.pdf",
        "cmisid": "yib5C-w92PPtxTBlXl4UJ8oDBthDtAU9mKN5kh2_KrQ"
    },
    "1": {
        "name": "persdoc.pdf",
        "cmisid": "dqAnrdNMXGTz1RbOMI37OY6tH9xMdxiTnz6wEl2m-VE"
    },
    "2": {
        "name": "certdoc.pdf",
        "cmisid": "6d7DuhldQlnb0JSjXlZb9mMOjxV3E_ID-ynJ0QRPMOA"
    }
}
"""

struct Item : Codable {
    let name, cmisid : String
}

do {
    let data = Data(jsonString.utf8)
    let result = try JSONDecoder().decode([String: Item].self, from: data)
    let keys = result.keys.sorted()
    let array = keys.map{ result[$0]! }
    print(array)

} catch {
    print(error)
}

Upvotes: 1

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