如何在ejs中包含promise值？

Question

I am making a small node application with help of express and ejs . In one of my controllers I return an object that has a promised property that I would like to include in my view. I was trying to figure out what is the best approach to do this, since it seems ejs can't handle promised values. I thought about including the promised value in the model instead, but it seems I overly complicated the code needed to be done.

How can I present a bluebird promised value easily in ejs ?

Controller

compaintsRouter.get('/', function(req, res) 
{
    var model = data.complaint.findAndCount({
        include: [data.user, {
            model: data.comment,
            include: [data.user]
        }],
        limit: 15,
        offset: 15 * (req.query.page || 0) 
    }).then(function(result){
        res.render('complaints/list', {model: result.rows});
    });
});

ejs View template

<% model.forEach(function(complaint) { %>

    <div class="complaint">
        ... more html here...
        <footer>
            <span class="vote brand-success">
                <% complaint.votesUp().then(function(votes){%> 
                    <%= votes %> 
                <%}) %>
                <span class="glyphicon glyphicon-thumbs-up clickable"></span>
            </span>
        </footer>
        ... more html here...
    </div>

<% }) %>

Promised method:

votesUp: function() {
    return this.getFollower().then(function(followers){
        var aux = followers
            .selectMany(function(f){return f.UserComplaint})
            .map(function(v){ 
                return ((v.liked === true) ? 1: 0);
            });
        aux.push(0);
        aux.reduce(function(acc, v){
            return acc+v;
        });
    })
}

Answer 1

Seems like the answer might be mix business logic into the view so much. Can you get the votes earlier so that you don't have to mess with it in the template? Seems pretty messy. :)

(ps, +1 to offset the downvote)

Answer 2

It seems I was missing a functionality of my orm, which was sequelize. They allow me to retrieve the association as long as I include the model on my query. The modifications needed to be done were the following:

Controller

compaintsRouter.get('/', function(req, res) 
{
    var model = data.complaint.findAndCount({
        include: [data.user, {
            model: data.comment,
            include: [data.user]
        }, {
            model: data.user,
            as: 'follower'
        }],
        limit: 15,
        offset: 15 * (req.query.page || 0) 
    }).then(function(result){
        res.render('complaints/list', {model: result.rows});
    });
});

Method that uses the data:

votesUp: function() {
        var aux = this.follower
            .selectMany(function(f){return f.UserComplaint})
            .map(function(v){ 
                return ((v.liked === true) ? 1: 0);
            });
        aux.push(0);
        return aux.reduce(function(acc, v){
            return acc+v;
        });
    }