Google App Maker: How to access properties of an item bound to widget?

Question

In the App maker, I have created a datasource with several items which I'm displaying on a table. When the user clicks on an item, a pop up comes up with the properties of the item the user clicked bound to the widget. Once the user clicks the save button on that pop up, I want to get the id of the current item in a server script. How can I achieve this?

Answer 1

You will need to use an asynchronous operation. The official documentation explains how you can achieve this. Basically, you need to do something similar to this:

Let's say that on a server script you have the following:

function doSomething(id){
    //do something
    if(!id){
        throw Error("Id is missing");
    }        
    return "ID = " + id;
}

Then on the SAVE button you need to have something like this on the onClick event handler:

var id = app.datasources.**yourDataSource**.item.id;
google.script.run.withFailureHandler(function(error){
    console.log(error);
).withSuccessHandler(function(response){
    console.log(response);
}).doSomething(id);

I hope this helps!