What is the replacement for "metadataLoaded" in JSONModel?

Question

In sap.ui.model.odata.v2.ODataModel, there is a metadataLoaded method which I can use it like this:

this.getModel().metadataLoaded().then( function() {
    var sObjectPath = this.getModel().createKey("/", {
        ID :  sObjectId
    });
    this._bindView("/" + sObjectPath);
}.bind(this));

JSONModel doesn't seem to have a corresponding method since there is no service metadata concept in client-side models. So is there any other work around?

I tried attachRequestCompleted. It's not working as expected:

function bindview() {
    that._bindView(sObjectId);
}
this.getModel().attachRequestCompleted(bindview);

score 0 · Accepted Answer · answered May 04 '17 at 02:49

0

As you rightly said, there is no metadata. But for Json model why do you want to wait for any event? You can directly bind the view.

answered May 04 '17 at 02:49

krisho

1,004
7
26

Sometimes I found that the API that get the JSON Model is pending when I call bindview in _onObjectMatched. (`this.getRouter().getRoute("object").attachPatternMatched(this._onObjectMatched, this);`) – Tina Chen May 05 '17 at 06:04

Tina Chen · Answer 2 · 2017-06-22T01:55:47.773

attachRequestCompleted only fires once when model is loaded, So I fix this problem in this way:

jsonModelLoaded: false,

_onObjectMatched : function (oEvent) {
    if(this.jsonModelLoaded) {
        this._bindView(sObjectId);
    }

    function bindview() {
        that.jsonModelLoaded = true;
        that._bindView(sObjectId);
    }
    this.getModel().attachRequestCompleted(bindview);
}

another not documented solution is using this.getModel().attachRequestCompleted().pSequentialImportCo‌mpleted.then()

Related question here: Why metadataLoaded can be fired multiple times?

score 0 · Answer 3 · answered May 18 '20 at 22:00

Since 1.64¹, JSONModel returns a promise when loadData or dataLoaded is called. For example:

_onObjectMatched: function(oEvent) {
  const myJSONModel = this.getView().getModel();
  const sObjectId = /*...*/;
  myJSONModel.dataLoaded().then(() => this._bindView(sObjectId));
},

Unlike v2ODatamodel.metadataLoaded()², the promise here actually rejects if the request fails.

^{¹ Commit: bd4e2fc

² The promise returned from metadataLoaded() never rejects even if loading the metadata document failed. However, since 1.79, apps can pass true as an argument to get a catch-able promise: metadataLoaded(true).}

What is the replacement for "metadataLoaded" in JSONModel?

3 Answers3

Linked