Ajax and ci4 validation

Can you explain more precisely. For example, I do not understand what you are talking about.

Normally, I place my validation in the Model (sometimes place in controller) something like this;

PHP Code:

    $category = $this->model->find($category_id);
        if ($this->request->getMethod() === 'post') {
            $category->fill($this->request->getPost());
            if ($this->model->save($category)) {
                return redirect()->to('/admin/post/categories')
                                 ->with('info', 'Success - category was updated');
            } else {
                return redirect()->back()
                                 ->with('errors', $this->model->errors())
                                 ->with('warning', 'Invalid Data')
                                 ->withInput();
            }
        } else {
            $this->data['category'] = $this->model->find($category_id);
            return view('/Admin/Category/category_update', $this->data    );
        } 


My rules are somethin like;

PHP Code:

protected $validationRules    = [
        
        'category_name' => 'required|is_unique[category.category_name]|min_length[5]|max_length[50]',
        'category_user_id' => 'required',
         'category_description' => 'required|min_length[5]|max_length[250]',
        ];
    protected $validationMessages = [
        'category_name' => [
            'required' => 'The category name is required',
            'is_unique' => 'The category already exists',
            'min_length' => 'The minimum length is 5 characters',
            'max_length' => 'The maximum length is 50 characters'
            ],
        'category_description' => [
            'required' => 'The category description is required',
            'min_length' => 'The minimum length is 5 characters',
            'max_length' => 'The maximum length is 50 characters'
            ],   
        ]; 


How would like use the above in case of using ajax. Is is possible?