Expressjs Retrieving Collections Based on Parameter - node.js

Question

I am trying to loop my database collections based on a parameter request for one of my schema properties within a view. I have a tags property within my schema that is saved as an array. What I want to be able to do is click on one of the values saved to that array, which will render a page with collections that contain the selected tags value. I have been able to create the route, which will direct me to the individual tag that was clicked, but I receive a tags: [xxx, xxx, xxx] has no method .forEach.that occurs when I call my loop within my view. Why would this be and how should I solve this?
Error message:
TypeError: /Users/user/Desktop/Projects/node/blog/views/pages/tag.ejs:15
13| <div class="col-md-12">
14| <h1><%= blogpost.tags %></h1>
>> 15| <% blogpost.forEach(function(blogpost) { %>
16| <%= blogpost.title %>
17| <% }); %>
18| </div>
Object { _id: 54c7bd20c58f389232000001,
category: 'Analytics/SEO/SEM',
content: '',
tagline: 'yep',
author: 'Author',
blogUrl: 'roger',
featureImage: '/images/event-placeholder.png',
title: 'Roger',
__v: 0,
date: Tue Jan 27 2015 11:29:48 GMT-0500 (EST),
tags: [ 'wolf', ' cow', ' monkey' ] } has no method 'forEach'
Here is my model:
var mongoose = require('mongoose');
var mongoosePaginate = require('mongoose-paginate');
var Schema = mongoose.Schema;
var BlogPostSchema = new Schema({
title: { type: String, unique: true },
featureImage: String,
blogUrl: String,
author: String,
tagline: String,
category: String,
content: String,
tags: { type: Array, lowercase: true },
date: { type: Date, default: Date.now() }
});
BlogPostSchema.post('init', function (post) {
var date = new Date(post.date || Date.now() );
post.dateString = date.getMonth() + 1 + '/' + date.getDate() + '/' + date.getFullYear();
});
BlogPostSchema.plugin( mongoosePaginate );
var Blogpost = mongoose.model("Blogpost", BlogPostSchema);
module.exports = mongoose.model('Blogpost', BlogPostSchema);
Here is how I'm calling my individually selected tag within my route (Does my function use the correct parameter call method?):
router.route('/admin/posts/create')
// START POST method
.post(function(req, res) {
console.log("New instance");
console.log(req.body.tags);
var blogpost = new Blogpost(); // create a new instance of a Blogpost model
blogpost.title = req.body.title; // set the blog title
blogpost.featureImage = req.body.featureImage; // set the blog image
blogpost.blogUrl = blogpost.title.toLowerCase().replace(/\s+/g,"-");
blogpost.author = req.body.author; // set the author name
blogpost.tagline = req.body.tagline; // set the tagline
blogpost.content = req.body.content; // set the blog content
blogpost.category = req.body.category; // set the category
blogpost.tags = req.body.tags.trim().split(","); // set the tags
//Save Blog Post
blogpost.save(function(err) {
if (err)
res.send(err);
res.redirect(303, '/'); //NEEDS TO BE CHANGED
});
}) // END POST method
.get(isLoggedIn, function(req, res, blogpost) {
res.render('pages/blogpost-create', {
blogpost : blogpost
});
});
function getTagCriteria(params){
return {
tags: params.blogpost_tags
};
}
router.route('/tag/:blogpost_tags')
.get(function (req, res) {
var tagCriteria = getTagCriteria(req.params);
Blogpost.findOne(tagCriteria, function (err, blogpost) {
if (err)
res.sent(err);
res.render('pages/tag', {
blogpost : blogpost
})
})
});
pages/tag view file:
<div class="container">
<div class="col-md-12">
<h1><%= blogpost.tags %></h1>
<% blogpost.forEach(function(blogpost) { %>
<%= blogpost.title %>
<% }); %>
</div>
</div>

Answer 1

Change your mongo query to:
Blogpost.find(tagCriteria, function (err, blogpost) {
if (err)
res.sent(err);
res.render('pages/tag', {
blogpost : blogpost
})
})
NOTE: blogpost will now be an array [] instead of an object {}
Then in your jade, do the following
<% blogpost.forEach(function(post) { %>
<%= post.title %>
<% }); %>