Try to parse JSON Array of Arrays on Swift - arrays

Question

Here is the json code:
{
"rows":
[[{
"text":"some text",
"type":{
"type":"inlineUrl",
"url":"https://nothing.com"
}
}],
[{
"text":"some text",
"type":{
"type":"inlineCallback",
"data":"some data"
}
},
{
"text":"some text",
"type":{
"type":"inlineCallback",
"data":"some data"
}
}
]]
}
A more abbreviated would look like:
Rows = [ [Row1], [Row2, Row3] ]
And I'm trying to get it to work like this:
struct ReplyHandler: Codable {
let rows: [RowsHandler]
enum CodingKeys: String, CodingKey {
case rows
}
}
struct RowsHandler: Codable {
let row1: [RowHandler]
let row2: [Row2Handler]
enum CodingKeys: String, CodingKey {
case row1
case row2
}
}
struct RowHandler: Codable {
let text: String
let type: TypeHandler
enum CodingKeys: String, CodingKey {
case type = "type"
case text = "text"
}
}
struct Row2Handler: Codable {
let row1: RowHandler
let row2: RowHandler
enum CodingKeys: String, CodingKey {
case row1
case row2
}
}
struct TypeHandler: Codable {
let type: String
let url: String
enum CodingKeys: String, CodingKey {
case type = "type"
case url = "url"
}
}
But Xcode compiler gives this error:
Expected to decode String but found an array instead.
Don't understand how to properly nest other arrays in the array
While posting my question, I noticed that the arrays in "type" are different: the first row have url, the second and third have data, but anyway, it's not a point.

Answer 1

You can simplify your model to something like this:
struct ReplyHandler: Codable {
let rows: [[RowHandler]]
}
struct RowHandler: Codable {
let text: String
let type: TypeHandler
}
struct TypeHandler: Codable {
let type: String
var url: String?
var data: String?
}
Notice that url and data properties in TypeHandler are optionals to cover both cases.

Answer 2

Although manual JSON parsing is useful I think that it must be much easier to use tool like this https://app.quicktype.io/ to convert JSON into Swift classes or structs
For you JSON it provides this result
// MARK: - Welcome
struct Welcome: Codable {
let rows: [[Row]]
}
// MARK: - Row
struct Row: Codable {
let text: String
let type: TypeClass
}
// MARK: - TypeClass
struct TypeClass: Codable {
let type: String
let url: String?
let data: String?
}