Synopsis
I'm using MeanJS as a full web stack solution for a web application to list articles from users. It is very similar to the example provided by default by MEAN.JS.
Question
When I call the list of articles http://localhost:3000/articles
, the result set has the user email and username associated with each article (through Mongoose Populate function). But when I retrieve a single article http://localhost:3000/articles/1234567890
, the user information are not associated with the article.
I have tried to use mongoose-relationsip plugin, and adding toObject: { virtuals: true }, toJSON: { virtuals: true }
to the article model. Both did not work.
For more details, I have associated the controller, the router and the model of the article object.
Models
For simplicity, I have only included the necessary attributes for each object. Basically, I have an article object and a user object (btw: I'm using the same example provided by MEAN.JS).
articles.server.model.js 'use strict';
/**
* Module dependencies.
*/
var mongoose = require('mongoose'),
Schema = mongoose.Schema,
relationship = require("mongoose-relationship");
/**
* Article Schema
*/
var ArticleSchema = new Schema({
body: {
type: String,
default: '',
trim: true
},
created: {
type: Date,
default: Date.now
},
user: {
type: Schema.ObjectId,
ref: 'User',
childPath:"articles"
},
viewCount: {
type: Number,
optional: true,
},
comments:[{
type:Schema.ObjectId,
ref:"Comment"
}],{
strict: true,
toObject: { virtuals: true },
toJSON: { virtuals: true }
});
ArticleSchema.plugin(relationship, { relationshipPathName:'user' });
mongoose.model('Article', ArticleSchema);
articles.server.routes.js
'use strict';
/**
* Module dependencies.
*/
var users = require('../../app/controllers/users.server.controller'),
articles = require('../../app/controllers/articles.server.controller');
module.exports = function(app) {
// Article Routes
app.route('/articles')
.get(articles.list)
.post(users.requiresLogin, articles.create);
app.route('/articles/:articleId')
.get(articles.read)
.put(users.requiresLogin, articles.hasAuthorization, articles.update)
.delete(users.requiresLogin, articles.hasAuthorization, articles.delete);
// Finish by binding the article middleware
app.param('articleId', articles.articleByID);
};
articles.server.controller.js
'use strict';
/**
* Module dependencies.
*/
var mongoose = require('mongoose'),
errorHandler = require('./errors.server.controller'),
Article = mongoose.model('Article'),
db=require('./databaseoperations'),
_ = require('lodash');
/**
* Show the current article
*/
exports.read = function(req, res) {
res.json(req.article);
};
/**
* List of Articles
*/
exports.list = function(req, res) {
Article.find().populate('user', 'displayName email').exec(function(err, articles) {
if (err) {
return res.status(400).send({
message: errorHandler.getErrorMessage(err)
});
} else {
res.json(articles);
}
});
};
/**
* Article middleware
*/
exports.articleByID = function(req, res, next, id) {
Article.findById(id).populate('user', 'displayName email').exec(function(err, article) {
if (err) return next(err);
if (!article) return next(new Error('Failed to load article ' + id));
next();
});
};
Any help will be very appreciated.
Thanks.
It looks like your article middleware is not adding the article to the req
. Add this line before calling next()
:
req.article = article;
In this part, you are not assigning result to req
exports.articleByID = function(req, res, next, id) {
Article.findById(id).populate('user', 'displayName email').exec(function(err, article) {
if (err) return next(err);
if (!article) return next(new Error('Failed to load article ' + id));
req.article = article; //THIS PART IS MISSING
next();
});
};
So when you read single article by id, you return it from req.article
exports.read = function(req, res) {
res.json(req.article);
};
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.