Saving a Portal Item Back to ArcGIS Online

Question

Is there a method in the javascript api to save a portal item back to ArcGIS Online after making changes in a custom application? For example adjusting a webmap's initial extent.

Thanks,
~Bill

JasonZou · Answer

Cool. Thanks Jian. You always have an answer for my questions:) Happy Thanksgiving!

JianHuang · Answer

Jason,

Please take a look at the code snippet.
function updateWebMap() {
        var portal = new esri.arcgis.Portal("http://www.arcgis.com/sharing/rest");
        portal.signIn().then(getItem);
      };
function getItem(user) {
        var itemUrl = user.portal.url + "/content/items/" + webMapId;
        var request = esri.request({
          url: itemUrl,
          content: {
            "f": "json"
          }
        });
        request.then(dojo.partial(getWebMapText, user, itemUrl));
      };
function getWebMapText(user, itemUrl, item) {
        if (item.type === "Web Map") {
          //get current webmap text
          var request = esri.request({
            url: itemUrl + "/data",
            content: {
              "f": "json"
            }
          });
          request.then(dojo.partial(updateWebMapText, item, user));
        } else {
          alert("Not a Webmap item!");
        }
      };
function updateWebMapText(item, user) {
        var folder = (item.ownerFolder) ? "/" + item.ownerFolder : "";
        var userItemUrl = user.userContentUrl + folder + "/items/" + item.id;
        var webMapText = dojo.toJson(webMapJson);//your updated web map

Hi Kelly,

I don't see a REST operation that can be used to update the item data. Can you point out which operation is for editing and updating the item data?

Thanks,

Jason

khutchins · Answer

Instead of using dojo/request/xhr take a look at esri.request. It is a utility method that simplifies the process. More info on using esri.request can be found here:

https://developers.arcgis.com/en/javascript/jshelp/inside_esri_request.html