Display Custom Error On Symfony Admin Product Controller Form In Prestashop 1.7

In this post, I am going to explain how we can display the error on Admin Product controller custom form in our module.

Step 1:-  Changes in template form

Register the hook displayProductExtra and return the HTML

Make sure you have added id=”form_hooks_{field_name}” in the form field where you want to display the error.

<input type=”text” name=”{field_name}” id=”form_hooks_{field_name}” />

Example:-

<input type=”text” name=”title” id=”form_hooks_title” />

Step 2:- On Product Save

Inside ActionProductSave hook check the condition and set the error in the following format

$this->context->controller->errors['hooks_{form_field_name}'] = array('{Error Message}'));

Example: –

$this->context->controller->errors['hooks_title'] = array('Invalid Input'));

Now check the condition whether there is an error or not.

If there is an error then set the http_response_code with 400 and die the error.

if ($this->context->controller->errors) {
    http_response_code(400);
    die(json_encode($this->context->controller->errors));
}

This is how we can display the error message in the Admin Product controller custom form of our module.