PHP Form with Bootstrap Validation

I have a php bootstrap validation form that when submitted sends the details to a database. The form works nicely. I have the validation and the success working, I have all the details going to the database but my issue is with clearing the form. When I press submit, it all works well except for it doesn't clear the form. This is my code....CAN ANYONE PLEASE HELP!!!

.on('success.form.bv', function(e) {
$('#success_message').slideDown({ opacity: "show" }, "slow") // Do something ...
$('#contact_form').data('bootstrapValidator').resetForm();

// Prevent form submission
e.preventDefault();

// Get the form instance
var $form = $(e.target);

// Get the BootstrapValidator instance
var bv = $form.data('bootstrapValidator');

// Use Ajax to submit form data
$.post($form.attr('action'), $form.serialize(), function(result) {
console.log(result);
}, 'json');
});