How to decode array in array JSON?

Question

I can't get all elements of my array. I think the problem is in my Model, but i don't know how to correct it. The following JSON is given:

    {
    "statusCode": 200,
    "message": "Success",
    "content": [
        {
            "description": {
                "1": {
                    "name": "First",
                    "cost": 200,
                    "count": 1
                },
                "2": {
                    "name": "Second",
                    "cost": 500,
                    "count": 1
                }
            },
            "sum": 700,
            "created_at": "13.11.2018 17:22"
        }
    ]
}

My Model:

// MARK: - History
struct History: Codable {
    let statusCode: Int
    let message: String
    let content: [History_Content]
}

// MARK: - Content
struct History_Content: Codable {
    let description: [String: History_Description]
    let sum: Int
    let created_at: String

    enum CodingKeys: String, CodingKey {
        case description
        case sum
        case created_at
    }
}

// MARK: - Description
struct History_Description: Codable {
    let name: String
    let cost, count: Int
}

My cellForRowAt :

var arrData = [History_Content](). 
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "history_cell", for: indexPath) as! HistoryTableViewCell
        
        cell.time.text = arrData[indexPath.row].created_at
        for i in arrData[indexPath.row].description.self{
            cell.desc.text = "You bought \"\(i.value.name)\""

        }
        
        return cell
    }

I just get a single element of description. How can i get all elements of this array? What do i need to change in my code?

What do you do after the decoding, what do you assign to arrData? — Joakim Danielson
– Joakim Danielson, Commented Jul 2, 2020 at 11:04
Change let description: [String: History_Description] (dictionary) to let description: [History_Description] (array) — Deitsch
– Deitsch, Commented Jul 2, 2020 at 11:10

Joakim Danielson · Accepted Answer · 2020-07-02 11:38:18Z

1

If you want to merge name of all values you can do

let row = arrData[indexPath.row]
cell.desc.text = "You bought \(row.description.values.map { $0.name }.joined(separator: ", "))"

But if the order is important you can sort first, here I sort by key

let sorted = row.description.sorted(by: { $0.key < $1.key })
cell.desc.text = "You bought \(sorted.map { $0.value.name }.joined(separator: ", "))"

edited Jul 2, 2020 at 11:38

answered Jul 2, 2020 at 11:32

Joakim Danielson

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Marshall Over a year ago

Thank you. This code works like @erik_m_martens, but takes less characters

erik_m_martens · Accepted Answer · 2020-07-02 11:26:57Z

1

for i in arrData[indexPath.row].description.self{
   cell.desc.text = "You bought \"\(i.value.name)\""
}

You are iterating over each value of the description-dictionary and setting the contents to cell.desc.text. However each time you set the cell.desc.text in your for-loop you override the previously assigned value.

What do you want to achieve here for the cell.desc.text? A comma-separated list? Then you should do something like this:

var cellDescr = "You bought"
for i in arrData[indexPath.row].description.self {
    cellDescr.append(" \"\(i.value.name)\",")
}
cell.desc.text = cellDescr.trimmingCharacters(in: .punctuationCharacters) // remove dangling comma

Let me know if this helps or you want to achieve something else and I will update my answer for you.

answered Jul 2, 2020 at 11:26

erik_m_martens

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1 Comment

Marshall Over a year ago

Thank you so much. It is working That is what i needed

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