嗨我正在使用angularfire为我的应用程序 我在这里列出我的服务和控制器。我计划获得已添加到特定职位的评论数。这是我的控制器如何计算angularfire中的子元素?
app.controller('PostViewCtrl', function ($scope,
FIREBASE_URL,$routeParams,
Post, Auth, $timeout,$interval,$http, $rootScope, $firebase) {
var ref = new Firebase(FIREBASE_URL);
$scope.post = Post.get($routeParams.postId);
$scope.comments = Post.comments($routeParams.postId);
$scope.user = Auth.user;
$scope.signedIn = Auth.signedIn;
$scope.addComment = function() {
if(!$scope.commentText || $scope.commentText === '') {
return;
}
var Commentcreatedtime = moment().format('llll');
$scope.CommentcreatedTime = Commentcreatedtime;
var comment = {
createdTime: $scope.CommentcreatedTime,
text: $scope.commentText,
creator: $scope.user.profile.username,
creatorUID: $scope.user.uid,
creatorpic: $scope.user.profile.userpic,
commentimage: $scope.object.image.info.uuid
};
$scope.comments.$add(comment);
$scope.commentText = '';
$scope.object.image.info.uuid = '';
};
});
这是我的服务
'use strict';
app.factory('Post', function($firebase,FIREBASE_URL){
var ref = new Firebase(FIREBASE_URL);
var posts = $firebase(ref.child('posts')).$asArray();
var Post = {
all: posts,
create: function(post){
return posts.$add(post).then(function(postRef){
$firebase(ref.child('user_posts').child(post.creatorUID))
.$push(postRef.name());
return postRef;
});
},
get: function(postId){
return $firebase(ref.child('posts').child(postId)).$asObject();
},
delete: function(post){
return posts.$remove(post);
},
comments: function(postId){
return $firebase(ref.child('comments').child(postId)).$asArray();
}
};
return Post;
});
我已经使用事务以更新addComment事件这样
$scope.comments.$add(comment, function(error) {
if (!error) {
$firebase(ref.child('comments').child(postId)
.child('commentcount')).transaction(function (count) {
return count + 1;
});
}
});
计数器尝试,但这种不创建孩子评论 - postId也没有柜台。请帮助我。我是新来的firebase和角度和你的帮助将不胜感激。