ghost/core/client/validators/post.js

var PostValidator = Ember.Object.create({
    validate: function (model) {
        var validationErrors = [],

            title = model.get('title');

        if (validator.empty(title)) {
            validationErrors.push({
                message: 'You must specify a title for the post.'
            });
        }

        return validationErrors;
    }
});

export default PostValidator;