保存upvote值到数据库（MEAN stack - reddit clone）

Question

我一直在从thinkster.io教程开发一个reddit克隆，我无法弄清楚如何将upvote值保存到数据库。有人可以看看吗？

从angularApp.js //

.factory('posts', ['$http', 'auth', function($http, auth){ 
    var o = { 
    posts: [] 
    }; 

    o.upvote = function(post) { 
    return $http.put('/posts/' + post._id + '/upvote', { 
     headers: {Authorization: 'Bearer '+auth.getToken()} 
    }).success(function(data){ 
     post.votes += 1; 
    }); 
    }; 
    return o; 
}]) 

.controller('MainCtrl', [ 
'$scope', 
'posts', 
'auth', 
function($scope, posts, auth){ 
    $scope.posts = posts.posts; 
    $scope.isLoggedIn = auth.isLoggedIn; 

    $scope.addPost = function(){ 
    //prevents empty posts 
    if(($scope.title === '') || ($scope.body === '')) { return; } 
    //creates post 
    posts.create({ 
     title: $scope.title, 
     votes: 0, 
     createdOn: Date.now(), 
     link: $scope.link, 
     body: $scope.body, 
    }); 
    //returns empty values after post is created 
    $scope.title = ''; 
    $scope.link = ''; 
    $scope.body = ''; 
    }; 
    $scope.incrementUpvotes = function(post){ 
     posts.upvote(post); 
    }; 
}]) 

//猫鼬交架构

var PostSchema = new mongoose.Schema({ 
    title: { type: String, required: '{PATH} is required!'}, 
    body: String, 
    createdOn: { type: Date, default: Date.now }, 
    votes: {type: Number, default: 0}, 
    comments: [{ type: mongoose.Schema.Types.ObjectId, ref: 'Comment' }], 
    author: String 
}); 

PostSchema.methods.upvote = function(cb) { 
    this.votes += 1; 
    this.save(cb); 
}; 

mongoose.model('Post', PostSchema); 

//从index.js

// upvote a post 
router.put('/posts/:post/upvote', auth, function(req, res, next) { 
    req.post.upvote(function(err, comment){ 
    if (err) { return next(err); } 

    res.json(comment); 
    }); 
}); 

从index.ejs //（HTML ）

<i ng-click="incrementUpvotes(post)" class="ion-chevron-up"></i><br> 
    {{comment.votes}}<br> 

Answer 1

o.upvote = function(post) { 
    return $http.put('/posts/' + post._id + '/upvote', null, { ...