[英]Nodejs - Express - Mongoose: PUT Request problems with save method
[英]How does a put request work through Angular, Express, and Mongoose?
我和朋友正试图弄清楚教程中产生的代码到底发生了什么。 我们担心客户端/服务器的流程是一次调用factory.js的第8行:
factory.js
app.factory('postFactory', ['$http', function($http)
{
var o = {
posts: []
};
o.upvote = function(post){
return $http.put('/posts/' + post._id + "/upvote").success(function(data){
post.upvotes += 1;
});
};
return o;
}]);
MongoosePost.js
var mongoose = require('mongoose');
var PostSchema = new mongoose.Schema({
title: String,
url: String,
upvotes: {type: Number, default: 0},
comments: [{type: mongoose.Schema.Types.ObjectId, ref: 'Comment' }]
});
PostSchema.methods.upvote = function(cb)
{
this.upvotes += 1;
this.save(cb);
}
mongoose.model('Post', PostSchema);
expressRouter.js
var express = require('express');
var router = express.Router();
var mongoose = require('mongoose');
var Post = mongoose.model('Post');
var Comment = mongoose.model('Comment');
router.put('/posts/:post/upvote', function(req, res, next)
{
req.post.upvote(function(err, post)
{
if(err) { return next(err); }
console.log(post);
res.json(post);
});
});
这里有一个要点,以防人们喜欢它: https : //gist.github.com/drknow42/fe1f46e272a785f8aa75
我们认为我们理解的是:
我们不明白res.json(post)的作用,我们不知道它是如何知道实际看的帖子。
这是RESTful服务的一些基本规则。 默认的宁静路线是:
Verb Path Description
GET /post Get all posts
GET /post/create Page where you can create post
POST /post Method to create post in DB
GET /post/:post Show post by id
GET /post/:post/edit Page where you can edit post
PUT/PATCH /post/:post Method to update post in DB
DELETE /post/:post Method to delete post in DB
当您需要更新模型时,您正在向/ model /:id发送请求。 基于来自请求的id,它将找到要更新的模型。 在您的情况下,id为:post in url。 请求正文包含此模型的新/更新字段。 res.json()
将模型上的较新版本发送到客户端angular.js代码。
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