Codeigniter 3: replace "field is required" with "field can not be empty" - codeigniter

Question

I am working on a basic blog application in Codeigniter 3.1.8.
I have a create post form and an update post form. They both have validation rules. For the update form's invalid field "warnings", I want to replace the expression "field is required" with "field can not be empty".
Here is the code (Posts controller):
public function edit($id) {
$data = $this->Static_model->get_static_data();
$data['post'] = $this->Posts_model->get_post($id);
$data['tagline'] = 'Edit the post "' . $data['post']->title . '"';
$this->load->view('partials/header', $data);
$this->load->view('edit');
$this->load->view('partials/footer');
}
public function update() {
// Form data validation rules
$this->form_validation->set_rules('title', 'Title', 'required');
$this->form_validation->set_rules('desc', 'Short description', 'required');
$this->form_validation->set_rules('body', 'Body', 'required');
$this->form_validation->set_error_delimiters('<p class="error">', '</p>');
$id = $this->input->post('id');
if ($this->form_validation->run()) {
$this->Posts_model->update_post($id, $data);
redirect('posts/post/' . $id);
} else {
$this->edit($id);
}
}
If the title field is empty I want the warning to be: "The Title field can not be empty."
What shall I add/change to the update method?

Answer 1

You can do like this :
in your update method set message for required like this :
$this->form_validation->set_rules('title', 'Title', 'required',
array('required' => 'The Title field can not be empty')
);
$this->form_validation->set_rules('desc', 'Short description', 'required',
array('required' => 'Short description can not be empty')
);
/* use same for other fields*/
for more : https://www.codeigniter.com/user_guide/libraries/form_validation.html#setting-validation-rules

Answer 2

I have managed to get the desired invalid fields warnings this way:
public function update() {
// Form data validation rules
$this->form_validation->set_rules('title', 'Title', 'required', array('required' => 'The %s field can not be empty'));
$this->form_validation->set_rules('desc', 'Short description', 'required', array('required' => 'The %s field can not be empty'));
$this->form_validation->set_rules('body', 'Body', 'required', array('required' => 'The %s field can not be empty'));
$this->form_validation->set_error_delimiters('<p class="error">', '</p>');
$id = $this->input->post('id');
if ($this->form_validation->run()) {
$this->Posts_model->update_post($id, $data);
redirect('posts/post/' . $id);
} else {
$this->edit($id);
}
}