Express.js application bug: validationResult(req) method does not work

Question

I am working on a blogging application (click the link to see the GitHub repo) with Express, EJS and MongoDB.

Before submitting a

Answer 1

I have applied the solution provided by Saravanakumar T N with a small modification in messages.ejs.

I have: this in the controller:

exports.addPost = (req, res, next) => {
  const errors = validationResult(req);
  const post = new Post();
  if (!errors.isEmpty()) {
    req.flash('danger', errors.array());
    req.session.save(() => res.redirect('../addpost'));
 } else {
    post.title = req.body.title;
    post.short_description = req.body.excerpt
    post.full_text = req.body.body;

    post.save(function(err) {
        if (err) {
            console.log(err);
            return;
        } else {
            req.flash('success', "The post was successfully added");
            req.session.save(() => res.redirect('/dashboard'));
        }
    });
  }
}

In the view:

    <% Object.keys(messages).forEach(function (type) { %>
            <% messages[type].forEach(function (message) { %>
                    

                        <% if (type === 'danger') { %>
                            ×
                            <%= message.msg %>
                        <%} else { %>
                            <%= message %>
                        <% } %>
                
            <% }) %>
    <% }) %>