Chaining resource in angularjs

Question

I would like to chain resource in AngularJS.

The goal is that resource B wait the end of ressource A before the launch.

I tried this:

var p = $q.when(true);
p = p.then(function() {
    return $resource(...).query().$promise;
});
p = p.then(function() {
    return $resource(...).query().$promise;
});
p = p.then(function() {
    return $resource(...).query().$promise;
});

The point is that the call is not synchronous.

KFunk · Accepted Answer · 2014-09-16 21:54:45Z

2

There is a way to group many asynchronous calls using $q.all. The docs for this are here.

$q.all() will allow you to send in all your queries and then wait for them all the return before resolving a combined promise. However, if you want your queries to happen in a specific order, this may not work.

Hope this helps.

edited Sep 16, 2014 at 21:54

KFunk

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answered Nov 3, 2013 at 22:40

Davin Tryon

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2 Comments

Julio Over a year ago

This is working fine with $q.allbut are you sure that query return a promise. It's not clear in my mind. "It is important to realize that invoking a $resource object method immediately returns an empty reference (object or array depending on isArray). Once the data is returned from the server the existing reference is populated with the actual data."

Davin Tryon Over a year ago

On a second read of the docs, I think you are right to use $promise. I'll change my answer a bit.

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