Create JSON object with Swift Xcode - json

Question

I have a JSON object below that uses everything from Strings, Bools and Int's. I'm currently having a difficult time recreating the person_details section of the object and I think because it's in brackets and has multiple values, like [String: Bool], [String: String] & [String: Int] ?
I posted towards the bottom what populates on the console, but any help structuring there person_details section in the would be great.
You'll see below, in my let order, I'm structuring the data.
let testJson = """
{
"household": {
"region": "PA",
"household_size": 1,
"receiving_benefits": [
],
"energy_crisis": false,
"utility_providers": [
"peco"
],
"residence_type": "other",
"property_tax_past_due": false,
"home_needs_repairs": false,
"filed_previous_year_tax_return": false,
"heating_system_needs_repairs": false,
"at_risk_of_homelessness": false,
"received_maximum_benefit": {
"cip": false
},
"person_details": [
{
"age": 18,
"marital_status": "single",
"minimum_employment_over_extended_period": false,
"work_status": "recent_loss",
"pregnant": false,
"attending_school": false,
"disabled": false
}
],
"incomes": [
{
"gross_monthly_amount": 700,
"countable_group": "household",
"year": "current"
},
{
"gross_monthly_amount": 700,
"countable_group": "household",
"year": "previous"
}
],
"assets": [
{
"amount": 1000,
"countable_group": "household"
}
]
}
}
"""
struct Eligibility: Encodable {
let residence: String
let hhmembers: Int
let receivingBen: [String]
let unhoused: Bool
let utilityType: [String]
let residenceType: String
let propertyTax: Bool
let homeRepairs: Bool
let fileLastTax: Bool
let heatRepairs: Bool
let receivingMax: [String: Bool]
enum CodingKeys: String, CodingKey {
case residence = "region"
case hhmembers = "household_size"
case receivingBen = "receiving_benefits"
case unhoused = "at_risk_of_homelessness"
case utilityType = "utility_providers"
case residenceType = "residence_type"
case propertyTax = "property_tax_past_due"
case homeRepairs = "home_needs_repairs"
case fileLastTax = "filed_previous_year_tax_return"
case heatRepairs = "heating_system_needs_repairs"
case receivingMax = "received_maximum_benefit"
}
}
struct PersonDetails: Encodable {
let age: Int
// let marital_status: String
// let minimum_employment_over_extended_period: Bool
// let work_status: String
// let pregnant: Bool
// let attending_school: Bool
// let disabled: Bool
enum CodingKeys: String, CodingKey {
case age = "age"
// case marital_status = "marital_status"
// case minimum_employment_over_extended_period = "minimum_employment_over_extended_period"
// case work_status = "work_status"
// case pregnant = "pregnant"
// case attending_school = "attending_school"
// case disabled = "disabled"
}
}
I believe What I'm missing is inside the let order = , see below:
struct Order: Encodable {
let household: Eligibility
let person_details: PersonDetails
}
let order = Order(household: Eligibility(residence: "PA", hhmembers: 1, receivingBen: [], unhoused: false, utilityType: ["Peco"], residenceType: "other", propertyTax: false, homeRepairs: false, fileLastTax: false, heatRepairs: false, receivingMax: ["cip": false]), person_details: PersonDetails(age: 19))
let encoder = JSONEncoder()
encoder.outputFormatting = .prettyPrinted
let orderJsonData = try! encoder.encode(order)
print(String(data: orderJsonData, encoding: .utf8)!)
Inside the Console shows that person_details in outside of 'household' but I would need the person_details inside of the household object as the above full JSON object shows at the top of the question (note square brackets too). Console below:
{
"household" : {
"region" : "PA",
"residence_type" : "other",
"at_risk_of_homelessness" : false,
"property_tax_past_due" : false,
"utility_providers" : [
"Peco"
],
"home_needs_repairs" : false,
"filed_previous_year_tax_return" : false,
"household_size" : 1,
"receiving_benefits" : [
],
"heating_system_needs_repairs" : false,
"received_maximum_benefit" : {
"cip" : false
}
},
"person_details" : {
"age" : 19
}
}

Answer 1

You've got the structure of your data hierarchy wrong converting from JSON to swift.
It should be...
struct Order: Codable {
let household: Household
}
struct Household: Codable {
let personDetails: [Person]
}
struct Person: Codable {
let age: Int
let maritalStatus: String
let minimumEmploymentOverExtendedPeriod: Bool
let workStatus: String
let pregnant: Bool
let attendingSchool: Bool
let disabled: Bool
}
let decoder = JSONDecoder()
decoder.keyDecodingStrategy = .convertFromSnakeCase
let order = try! decoder.decode(Order.self, from: Data(testJson.utf8))
returns
Person(age: 18, maritalStatus: "single",
minimumEmploymentOverExtendedPeriod: false, workStatus: "recent_loss",
pregnant: false, attendingSchool: false, disabled: false)]
Also worth pointing out is the use of the .keyDecodingStrategy to ease the converting from snake case. This saves defining the CodingKeys. Obviously this will only work where you're happy to keep the naming the same.