Showing dynamic content inside ngRepeat - angularjs

Question

Struggling to show dynamic content inside a ngRepeat. When it comes time to show my promise content, I'm getting an empty object {}:
<div ng-controller="DemoCtrl">
<div class="sidebar" ng-repeat="row in rows">
<div class="row">
<input type="checkbox">
<div class="name">{{row.name}}</div>
<div class="title">{{map[$index]}}</div>
</div>
</div>
</div>
and the controller:
function DemoCtrl($scope, $http, $q) {
const rows = function() {
const rows = [];
for (let i = 0; i < 12; i++) {
rows.push({
id: `demo-${i}`,
name: `Demo ${i}`
});
}
return rows;
};
$scope.rows = rows();
$scope.map = [];
// $scope.$watch($scope.map, function (oldValue, newValue) {
// console.log(oldValue, newValue);
// });
function _data() {
// const promises = [];
for (let i = 0; i < $scope.rows.length; i++) {
var defer = $q.defer();
$http.get(`https://jsonplaceholder.typicode.com/posts/${i + 1}`).then(function(post) {
defer.resolve(`${post.data.title.substring(0, 10)}...`);
});
$scope.map.push(defer.promise);
// promises.push(defer.promise);
}
// return $q.all(promises);
return $q.all($scope.map);
}
function _init() {
_data().then(function(data) {
$scope.map = data; // why aren't we getting here?
});
};
_init();
}
Plunker here: https://plnkr.co/edit/2BMfIU97Moisir7BBPNc
I've tinkered with some other ideas such as trying to add a $watch on the $scope object after the value changes, but I'm not convinced this will help in any way. Some lingering questions I have:
From what I understand, you can use a promise inside a template so how/why does this change inside a ngRepeat?
Why isn't my callback for $q.all getting called?
If this is not the right approach, what is?

Answer 1

In Angular you will almost never need to use $q.
You can simply fill an array of posts titles after each $http.get
function DemoCtrl($scope, $http) {
const rows = function () {
const rows = [];
for (let i = 0; i < 12; i++) {
rows.push({
id: `demo-${i}`,
name: `Demo ${i}`
});
}
return rows;
};
$scope.rows = rows();
$scope.map = [];
function _init() {
for (let i = 0; i < $scope.rows.length; i++) {
$http.get(`https://jsonplaceholder.typicode.com/posts/${i + 1}`).then(function (post) {
$scope.map.push(post.data.title);
});
}
}
_init();
}
https://plnkr.co/edit/zOF4KNtAIFqoCOfinaMO?p=preview