Error: TypeScript Knockout table failing to display data

I have a table that displays invoices, along with a nested table showing the individual checks associated with each invoice. I am using knockout and typescript to render these tables. Currently, I can successfully display the invoices but am facing difficulties in fetching and displaying data for the checks table. Here is the code snippet so far:

<tbody class="nohighlight" data-bind="foreach: parent.bankDrafts">
                            <tr>
                                <td><span data-bind="text: CheckID"></span></td>
                                <td><span data-bind="text: CheckRunID"></span></td>
                                <td><span data-bind="text: VendorName"></span></td>
                                <td><span data-bind="text: CheckDate"></span></td>
                                <td><span data-bind="text: FormatCurrency(CheckAmount)"></span></td>
                                <td><span data-bind="text: Globalize.formatCheckRunApproveStatus(ApprovalStatusID)"></span></td>
                             </tr>
                        </tbody>

Below is the relevant TypeScript code:

namespace CheckRunApproval {
declare let searchParameter: string;

class SearchCheckRunModel {
    public searchParameter = ko.observable<string>(searchParameter || null);
    public checkRuns = ko.observableArray<CheckRunModel>(null);
    public bankDrafts = ko.observableArray<BankDraftInfoModel>();
}
 var model = new SearchCheckRunModel();

export function GetBankDrafts(data: CheckRunModel): void {
    CheckRunServiceMethods.GetBankDrafts(data.CheckRunID())
        .done(bankDrafts => ko.mapping.fromJS(bankDrafts, null, model.bankDrafts));
 }
}

Here's the service call being made:

public static GetBankDrafts(checkrunID: number): JQueryPromise<BankDraftInfo[]> {
        return CommonMethods.doAjax<BankDraftInfo[]>(
            "/Corp/Checks/CheckRunApprovalWS.asmx/getBankDrafts",
            JSON.stringify({ checkrunID }),
            "GetBankDrafts"
        );
    }

The server call successfully retrieves the required data from the backend and returns the list of checks related to the invoices. However, when trying to populate the table on the front end, no data is displayed.

https://i.sstatic.net/bOUKh.png

My assumption is that the issue could be related to how I am mapping the model to the view model or potentially how the table itself is structured with the correct knockout attributes. Any assistance or insights would be highly appreciated.

Edit: By changing `parent.bankDrafts` to `$parent.bankDrafts()` the issue has been resolved.

Answer №1

Your code contains a mistake. Make sure to use $parent.bankDrafts instead of parent.bankDrafts when using a foreach binding.

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