ListGrid not updating its XML Datasource

[darkane]

Hello,

I have a ListGrid populated through a client-only DS. Data loads fine, updates made through the ListGrid are displayed, but the values are not updated in the XML data file linked to the DS.

I tried using:

nestedGrid.setAutoSaveEdits(true);

and also the same kind of "save" button as shown in the showcase.

                IButton saveButton = new IButton("Save");
                saveButton.setTop(250);
                saveButton.addClickHandler(new ClickHandler() {
                    public void onClick(ClickEvent event) {
                        nestedGrid.saveAllEdits();
                    }
                });
                hLayout.addMember(saveButton);

With both solutions, the edits seem to go through and are displayed, but nothing changes in the XML file.


So here is what I am wondering:

1. Are client-only DSs supposed to be able to save data?
2. What I am doing wrong? The code for my DS is below.

I am in dev-mode, using Jetty in the IntelliJ IDEA editor.

package gov.nist.toolkit.xdstools3.client.customWidgets.endpoints.configure;

import com.smartgwt.client.data.DataSource;
import com.smartgwt.client.data.fields.DataSourceTextField;

/**
 * SmartGWT datasource.
 *
 * Field names must match the XML source and must be unique to this datasource.
 */
public class TransactionDS extends DataSource {

    private static TransactionDS instance = null;

    public static TransactionDS getInstance() {
        if (instance == null) {
            instance = new TransactionDS();
        }
        return instance;
    }

    private TransactionDS() {
        setID("transactionDS");
        setDataURL("resources/datasources/endpoints/pub-edited-2.data.xml");
        setRecordXPath("/site/actor/transaction"); //the XML path of the element we want to display, in the datasource file (.data.xml)
        setClientOnly(true);

        //---- actors ----

        DataSourceTextField siteName = new DataSourceTextField("siteName", "Site Name");
        siteName.setValueXPath("ancestor::site/@siteName");
        siteName.setHidden(true);
        siteName.setForeignKey("endpointConfigDSNew.endpointName");

        DataSourceTextField actorCode = new DataSourceTextField("actorCode", "Endpoint Code");
        actorCode.setValueXPath("parent::actor/@actorCode");
        actorCode.setDisplayField("actorName");
        actorCode.setHidden(true); // is already displayed in group mode title

        DataSourceTextField actorName = new DataSourceTextField("actorName");
        actorName.setValueXPath("parent::actor/@actorName");
        actorName.setHidden(true); // used only for formatting


        //---- transactions -----

        DataSourceTextField transactionCode = new DataSourceTextField("transactionCode");
        transactionCode.setPrimaryKey(true);
        transactionCode.setCanEdit(false); // primary keys cannot be edited. A workaround is to delete the record and create a new one with the same values.
        transactionCode.setDisplayField("transactionName");

        DataSourceTextField transactionName = new DataSourceTextField("transactionName", "Transaction Type");
        transactionName.setCanEdit(false);
        transactionName.setHidden(true); // used only for formatting

        DataSourceTextField tls = new DataSourceTextField("secure", "TLS Endpoint");
        DataSourceTextField notls = new DataSourceTextField("unsecure", "Non-TLS Endpoint");


        setFields(siteName, actorCode, actorName, transactionCode, transactionName, tls, notls);
    }
}

[Isomorphic]

Client-only DataSources save changes for the lifetime of the page.

They do not write to the filesystem to change the XML file from which data was loaded.

[darkane]

Thank you for the answer, that does indeed explain a lot! :)

Any advice on the best strategies to save to file?

[Blama]

Hi darkane,

do you want to download/export data with the user's browser or do you want to persist changes until the next use of your application?

Do you need a specific file format?

Which version of SmartGWT are you using? LGPL or PRO/POWER/ENTERPRISE (with server component)?

Best regards,
Blama

[darkane]

Hi Blama,

I want to persist changes until the next use of the application, although I am not looking to do database persistence but rather save to an XML file as it is what I am using.

I am using the LGPL version 4.1p.

I found the exportData() function for a datasource, including setExportToFilesystem(true) and setExportAs(ExportFormat.XML)) and will try to export using these. They do seem like a server-side functionality though...

Thank you.