Data coming from (or going to) an API is not always organized/standardized. For instance, the json keys could have different naming schemes. Consider the case below:

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{
    first_name: ""
    MiddleName: "",
    lastName: "",
}

So how does this get coded? By using a feature called codingkeys. Simply create an enum inside the object you are decoding to as following:

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struct Name: Codable {
  let firstName: String
  let middleName: String
  let lastName: String
  enum CodingKeys: String, CodingKey {
    case firstName = "first_name"
    case middleName = "MiddleName"
    case lastName = "lastName"
  }
}

This codingkeys enum will allow the codable object to map to the json keys.

Originally published 09/16/2021 https://pittcsc.org/, republished 09/09/2022.