Dust.js Promise Array

Question

I have an issue with promises that resolve an array in Dust.js

Say I have a Dust.js function like so (this will be doing something else later on but for sake of a simple example), which resolves an array:

var doSomethingAsync = new Promise(function(resolve, reject) {
  // do a thing, possibly async, then…
  setTimeout(function(){

        var items = [{
            name: 'One',
        }, {
            name: 'Two',
        }, {
            name: 'Three',
        }];

        resolve(items);
    }, 5000);
});

res.stream('admin/index', {
    "async": doSomethingAsync
});

and my template is like this:

{#async}
    {name}
{/async}

It doesn't seem to print out what you would expect. Using contextDump helper it prints this:

[ { "name": "One" }, { "name": "Two" }, { "name": "Three" } ]

Anyone know what I'm doing wrong, whether this is intended behaviour or whether it is a bug?

Dust 2.7.2 is out with the fix.

Interrobang
– Interrobang

2015-06-08 21:50:42 +00:00
Commented Jun 8, 2015 at 21:50 — Interrobang
– Interrobang, Commented Jun 8, 2015 at 21:50

Interrobang · Accepted Answer · 2015-06-08 21:51:06Z

2

Your answer is correct. Currently the entire Array gets pushed onto the context, so you then have to iterate over your context:

{#async}
    {#.}
        {name}
    {/.}
{/async}

But this is fixed in Dust 2.7.2.

Using that version, you can iterate over the returned Array just as you'd expect.

{#async}
    {name}
{/async}

edited Jun 8, 2015 at 21:51

answered Jun 5, 2015 at 22:03

Interrobang

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Comments

Elliot Lings · Accepted Answer · 2015-06-05 18:33:09Z

0

Turns out you have to loop through itself...

{#async}
    {#.}
        {name}
    {/.}
{/async}

answered Jun 5, 2015 at 18:33

Elliot Lings

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2 Comments

Interrobang Over a year ago

This seems like a bug; I opened an issue for you on our issue tracker: github.com/linkedin/dustjs/issues/674

Interrobang Over a year ago

This will be fixed in 2.7.2

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