我正在尝试实现一个简单的收藏夹系统。在页面上,主页上列出了加载帖子,任何以前收到的名为nubs的帖子都会显示在其下方的FAVED标记。
<div class="list-group" ng-repeat="nub in nubs">
<a href="#" class="list-group-item active">
<h4 class="list-group-item-heading">{{nub.title}}</h4>
<p class="list-group-item-text">{{nub.description}}</p>
<p class="list-group-item-text">{{nub.synopsis}}</p>
<li ng-repeat="url in nub.attachmentsUrls">
<p class="list-group-item-image">
<img ng-src={{url}} />
</p>
</li>
</a>
<button ng-click="toggleFav(nub)">favorite</button>
<p ng-show="getFaved(nub.$id)">FAVED</p>
</div>
这是有效的,但是当我向收藏夹添加内容时,页面不会更新以反映新收藏的帖子。我想让我的页面积极响应toggleFav函数。
这是我的控制器
var ref = new Firebase("https://xxxxx.firebaseio.com");
var auth = ref.getAuth();
var nubRef = new Firebase("https://xxxxx.firebaseio.com/Nubs");
var nubs = $firebaseArray(nubRef);
$scope.nubs = nubs;
var userRef = new Firebase("https://xxxxx.firebaseio.com/users");
var users = $firebaseArray(userRef);
$scope.users = users;
// Array of booleans for favorites
$scope.favedArray = [];
// Array of user ids for
$scope.userIdArray = [];
var userFavs = $firebaseArray(userRef.child(auth.uid).child("favorites"));
$scope.userFavs = userFavs;
userFavs.$loaded()
.then
(
function()
{
nubs.$loaded()
.then
(
function()
{
$scope.tempFaved = [];
$scope.tempId = [];
console.log(userFavs);
angular.forEach
(
nubs,
function(nub)
{
$scope.tempFaved.push(false);
$scope.tempId.push(nub.$id);
console.log($scope.tempId);
angular.forEach
(
userFavs,
function(favs)
{
console.log($scope.tempFaved);
if(favs.nub == nub.$id)
{
$scope.tempFaved.pop();
$scope.tempFaved.push(true);
console.log($scope.tempFaved);
}
}
);
}
);
while($scope.tempFaved.length > 0)
{
$scope.favedArray.push($scope.tempFaved.pop());
$scope.userIdArray.push($scope.tempId.pop());
}
$scope.getFaved = function(nubId)
{
console.log($scope.favedArray[$scope.userIdArray.indexOf(nubId)]);
$scope.faved = $scope.favedArray[$scope.userIdArray.indexOf(nubId)];
return $scope.faved;
}
$scope.toggleFav = function(nub)
{
var nubFavRef = nubRef.child(nub.$id).child("favorites");
var nubFavs = $firebaseArray(nubFavRef);
var faved = $scope.getFaved(nub.$id)
console.log(faved);
if (faved == false)
{
nubFavs.$add
(
{
user: auth.uid
}
);
userFavs.$add
(
{
nub: nub.$id
}
)
console.log("favorited");
}
else
{
nubFavs.$remove(auth.uid);
userFavs.$remove(nub.$id);
console.log("unfavorited");
}
};
}
)
}
);
基本上,它循环遍历页面上显示的小块或帖子,并根据用户有利于显示FAVED标记的小块进行检查,并切换收藏夹按钮的功能。如果用户没有收到小节点,则按钮会将小节添加到他们的收藏夹列表中,并将其添加到已收藏小节点的用户列表中,如果用户确实收到了帖子,则会将其删除他们。
toggleFav的不受欢迎的功能也不起作用,所以也可以理解它的帮助,但这是能够访问我喜欢的faved阵列的正确子项的问题。不知道该怎么做。
我认为,当某些内容受到欢迎时,页面需要使用正确的信息进行更新才能获得一些听众,但我不确定如何实现它。
答案 0 :(得分:0)
/* How store data in fire base:
{
"home" : {
"room1" : {
"status" : "true",
"switch_name" : "light 2",
"user_id" : "-Kvbk-XHqluR-hB8l2Hh"
}
}
}
*/
//select element in which you want real time data.
const preObject = document.getElementById('tbl_switch_list');
//select your root table name
const dbRefObject = firebase.database().ref().child('home');
//Change Value in Firebase and view in your console.
dbRefObject.on('value',snap => console.log('Response : ',snap.val());
<h3>Switch List</h3>
<table id="tbl_switch_list" border="1">
<thead>
<tr>
<td>#ID</td>
<td>#switchName</td>
<td>#status</td>
</tr>
<thead>
<tbody id="list"></tbody>
</table>