Admin Controllers en modulos — guia completa

<?php

if (!defined('_PS_VERSION_')) { exit; }

/**
 * AdminController del modulo.
 * Ruta del archivo: modules/mymodule/controllers/admin/AdminMyModuleItemsController.php
 */
class AdminMyModuleItemsController extends ModuleAdminController
{
    public function __construct()
    {
        // Nombre de la tabla (sin prefijo) y clase del ObjectModel
        $this->table      = 'mymodule_item';
        $this->className  = 'MyModuleItem';
        $this->identifier = 'id_mymodule_item';
        $this->bootstrap  = true;

        // Columnas del listado
        $this->fields_list = [
            'id_mymodule_item' => ['title' => 'ID',     'align' => 'center', 'width' => 50],
            'name'             => ['title' => 'Nombre', 'width' => 'auto'],
            'active'           => ['title' => 'Activo', 'active' => 'status', 'type' => 'bool', 'align' => 'center'],
        ];

        parent::__construct();

        $this->bulk_actions = [
            'delete' => [
                'text'    => $this->l('Eliminar seleccionados'),
                'confirm' => $this->l('¿Seguro que deseas eliminar?'),
                'icon'    => 'icon-trash',
            ],
        ];
    }
}

<?php

if (!defined('_PS_VERSION_')) { exit; }

/**
 * Archivo: modules/mymodule/classes/MyModuleItem.php
 * (o src/Entity/MyModuleItem.php con autoload)
 */
class MyModuleItem extends ObjectModel
{
    public $name;
    public $description;
    public $active = true;
    public $date_add;
    public $date_upd;

    public static $definition = [
        'table'   => 'mymodule_item',
        'primary' => 'id_mymodule_item',
        'fields'  => [
            'name'        => ['type' => self::TYPE_STRING, 'validate' => 'isCleanHtml', 'size' => 255, 'required' => true],
            'description' => ['type' => self::TYPE_HTML,   'validate' => 'isCleanHtml'],
            'active'      => ['type' => self::TYPE_BOOL,   'validate' => 'isBool'],
            'date_add'    => ['type' => self::TYPE_DATE,   'validate' => 'isDate'],
            'date_upd'    => ['type' => self::TYPE_DATE,   'validate' => 'isDate'],
        ],
    ];
}

<?php

// Dentro de AdminMyModuleItemsController
public function renderForm(): string
{
    $this->fields_form = [
        'legend' => [
            'title' => $this->l('Item del modulo'),
            'icon'  => 'icon-cogs',
        ],
        'input' => [
            [
                'type'     => 'text',
                'label'    => $this->l('Nombre'),
                'name'     => 'name',
                'required' => true,
                'size'     => 50,
            ],
            [
                'type'  => 'textarea',
                'label' => $this->l('Descripcion'),
                'name'  => 'description',
                'rows'  => 5,
                'cols'  => 50,
                'autoload_rte' => true,  // TinyMCE
            ],
            [
                'type'   => 'switch',
                'label'  => $this->l('Activo'),
                'name'   => 'active',
                'values' => [
                    ['id'=>'active_on',  'value'=>1, 'label'=>$this->l('Si')],
                    ['id'=>'active_off', 'value'=>0, 'label'=>$this->l('No')],
                ],
            ],
        ],
        'submit' => [
            'title' => $this->l('Guardar'),
        ],
    ];

    return parent::renderForm();
}

<?php

// En mymodule.php — instalar el Tab al instalar el modulo
public function install(): bool
{
    return parent::install() && $this->installAdminTab();
}

public function uninstall(): bool
{
    return $this->uninstallAdminTab() && parent::uninstall();
}

private function installAdminTab(): bool
{
    $tab = new Tab();
    $tab->active     = 1;
    $tab->class_name = 'AdminMyModuleItems';
    $tab->module     = $this->name;
    $tab->id_parent  = (int) Tab::getIdFromClassName('IMPROVE');
    $tab->icon       = 'extension';

    foreach (Language::getLanguages() as $lang) {
        $tab->name[$lang['id_lang']] = 'Mis Items';
    }

    return (bool) $tab->save();
}

private function uninstallAdminTab(): bool
{
    $tabId = (int) Tab::getIdFromClassName('AdminMyModuleItems');
    if ($tabId) {
        $tab = new Tab($tabId);
        return (bool) $tab->delete();
    }
    return true;
}