Cell mapping is missing for model

[seyhunak]

Hello,

I was getting following error.

fatal error: Cell mapping is missing for model: Task(userId: 1, id: 1, title: "delectus aut autem", completed: false)

  {
    "id" : 199,
    "title" : "numquam repellendus a magnam",
    "userId" : 10,
    "completed" : true
  },
  {
    "id" : 200,
    "title" : "ipsam aperiam voluptates qui",
    "userId" : 10,
    "completed" : false
  }
]

Cell mapping is missing for model: Task(userId: 1, id: 1, title: "delectus aut autem", completed: false)
fatal error: Cell mapping is missing for model: Task(userId: 1, id: 1, title: "delectus aut autem", completed: false): file /Users/seyhunak/Projects/DemoTableViewManager/Pods/DTTableViewManager/Source/DTTableViewManager.swift, line 532

Here is the my implementation.

TaskViewController.swift

let json: NSArray? = try response.mapJSON() as? NSArray
   if let json = json {
       let tasks: Array<Task>? = Mapper<Task>().mapArray(json)

       self.manager.memoryStorage.removeAllItems()
       self.manager.memoryStorage.addItems(tasks!, toSection: 0)
       self.tableView.reloadData()                        
}

Task.swift

import Foundation
import ObjectMapper

// MARK: Initializer and Properties

public struct Task: Mappable {

    var userId: Int!
    var id: Int!
    var title: String!
    var completed: Bool!

    // MARK: JSON

    public init?(_ map: Map) {
        mapping(map)
    }

    public mutating func mapping(map: Map) {
        userId <- map["userId"]
        id <- map["id"]
        title <- map["title"]
        completed <- map["completed"]
    }

}

Fyi @DenHeadless

Thanks.

[DenTelezhkin]

Hey!

Prior to adding items to storage, you need to call

manager.registerCellClass(YourCellClass)

Where YourCellClass conforms to ModelTransfer protocol, therefore having following method:

class YourCellClass : UITableViewCell, ModelTransfer
{
    func updateWithModel(model: Task) {
    }
}

[Emptyless]

I have the same problem but I did define my cells to have the ModelTransfer and have the new Swift 3 syntax:

func update(with model: String) { self.nameLabel.text = model }

Getting this exact error:

Error Domain=DTTableViewManager.DTTableViewFactoryError Code=1 "(null)"
fatal error: Cell mapping is missing for model: ["Test User 1", "Test User 2"]

[DenTelezhkin]

Your model for some reason is an Array of Strings, not String.

[Emptyless]

I have written a more detailed post on S.O. : link

I am inputting an array of Strings in the manager.memoryStorage.addItems(items) like in the example right? What is/am I doing wrong?

[DenTelezhkin]

You should use addItems instead of addItem since you have an array of strings.

You would use addItem in case your model in cell is [String].

[Emptyless]

Thanks! I must have been reading over the 's' I did not have. Thank you very much.