srph srph - 1 month ago 5
Javascript Question

UI-Router: sequential resolve of parent and child states

I have two abstract states

parent
and
parent.child
, and an activateable state
parent.child.grand
.

I want
parent
to be promise resolved before
parent.child.grand
gets its resolves executed. Why? Because a certain data which comes from the ajax request in the resolve from
parent
is required in
parent.grand.child
.

Here's a gist

Is it possible to sequentially chain the promises of parent to children states without using controllers ?

(
parent
resolve start -> finish ajax request -> resolve promise ->
parent.child.grand
resolve start -> finish ajax request -> resolve promise)

Answer

I've seen a few answers for this but it still wasn't entirely clear without an example. The docs say:

The resolve keys MUST be injected into the child states if you want to wait for the promises to be resolved before instantiating the children.

Here's the example:

    $stateProvider.state('parent', {
          resolve:{
             resA:  function(){
                return {'value': 'A'};
             }
          },
          controller: 'parentCtrl'
       })
       .state('parent.child', {
          resolve:{
             // Adding resA as an argument here makes it so that this child state's resB resolve
             // function is not run until the parent state's resA resolve function is completed.
             resB: function(resA){
                return {'value': resA.value + 'B'};
             }
          }
          controller: 'childCtrl'
        })

And you don't have to inject resA into the child controller.

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