我是MVC的新手，正在尝试通过做作业来学习它。
这是我正在尝试做的：我希望用户与具有"将项目添加到"购物车"选项的表单进行交互(是的，我知道在Symfony2中有一个原则，但我不想使用它，我只是想真正理解MVC框架并构建一些简单的东西(。一旦用户将所有商品添加到"购物车"，他们就可以点击一个显示购买的按钮。一旦他们单击该按钮，就会显示一个新页面，显示他们在"购物车"中添加的所有商品。
以下是有效的方法：将显示一个表单，其中包含从另一个表单输入的"项目"。CRUD 功能正在工作，用户可以从此显示的表单中编辑或删除项目。
不起作用的是我添加到"购物车"方面。用户单击添加到购物车后，如何将商品从数据库中取出并放入数组中？
我认为我需要做什么：我知道我需要一个控制器方法来从数据库中取出已选择的项目并将它们存储在数组中，或者类似的东西。但是我不知道该怎么做。在寻找答案时，它们都比我需要的更复杂，symfony书/食谱也没有真正帮助我。我也在使用symfony2的2.7版本。
下面是我的控制器类，以及我的实体文件(我也有相应的存储库文件(。如果还需要任何其他内容，请告诉我。
<?php
namespace AppBundle'Entity;
use Doctrine'ORM'Mapping as ORM;
use Doctrine'Common'Collections'ArrayCollection;
/**
* Item
*
* @ORM'Table(name="items")
* @ORM'Entity(repositoryClass="AppBundle'Entity'ItemRepository")
*/
class Item
{
/**
* @var ArrayCollection
*
* @ORM'OneToMany(targetEntity="Description", mappedBy="item")
*/
private $descriptions;
/**
* @var integer
*
* @ORM'Column(name="id", type="integer")
* @ORM'Id
* @ORM'GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* @var string
*
* @ORM'Column(name="name", type="string", length=255)
*/
private $name;
public function __construct() {
$this->descriptions = new ArrayCollection();
}
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set name
*
* @param string $name
* @return Item
*/
public function setName($name)
{
$this->name = $name;
return $this;
}
/**
* Get name
*
* @return string
*/
public function getName()
{
return $this->name;
}
/**
* Add descriptions
*
* @param 'AppBundle'Entity'Description $descriptions
* @return Item
*/
public function addDescription('AppBundle'Entity'Description $descriptions)
{
$this->descriptions[] = $descriptions;
return $this;
}
/**
* Remove descriptions
*
* @param 'AppBundle'Entity'Description $descriptions
*/
public function removeDescription('AppBundle'Entity'Description $descriptions)
{
$this->descriptions->removeElement($descriptions);
}
/**
* Get descriptions
*
* @return 'Doctrine'Common'Collections'Collection
*/
public function getDescriptions()
{
return $this->descriptions;
}
/**
* Render a Item as a string
*
* @return string
*/
public function __toString() {
return $this->getName();
}
}
/
namespace AppBundle'Entity;
use Doctrine'ORM'Mapping as ORM;
use Symfony'Component'Validator'Constraints as Assert;
use Doctrine'Common'Collection'ArrayCollection;
/**
* Description
*
* @ORM'Table(name="descriptions")
* @ORM'Entity(repositoryClass="AppBundle'Entity'DescriptionRepository")
*/
class Description
{
/**
* @var Item
*
* @ORM'ManyToOne(targetEntity="Item", inversedBy="descriptions")
* @ORM'JoinColumn(name="item_id", referencedColumnName="id", onDelete="cascade")
*/
private $item;
/**
* @var integer
*
* @ORM'Column(name="id", type="integer")
* @ORM'Id
* @ORM'GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* @var integer
*
* @ORM'Column(name="price", type="integer")
* @Assert'Range(
* min = 1,
* minMessage = "Price needs to be 1 or higher."
* )
*/
private $price;
/**
* @var string
*
* @ORM'Column(name="info", type="string", length=255)
*/
private $info;
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set price
*
* @param integer $price
* @return Description
*/
public function setPrice($price)
{
$this->price = $price;
return $this;
}
/**
* Get price
*
* @return integer
*/
public function getPrice()
{
return $this->price;
}
/**
* Set info
*
* @param string $info
* @return Description
*/
public function setInfo($info)
{
$this->info = $info;
return $this;
}
/**
* Get info
*
* @return string
*/
public function getInfo()
{
return $this->info;
}
/**
* Set item
*
* @param 'AppBundle'Entity'Item $item
* @return Description
*/
public function setItem('AppBundle'Entity'Item $item = null)
{
$this->item = $item;
return $this;
}
/**
* Get item
*
* @return 'AppBundle'Entity'Item
*/
public function getItem()
{
return $this->item;
}
}
/看看下面的添加操作功能....////////////////
<?php
namespace AppBundle'Controller;
use Symfony'Component'HttpFoundation'Request;
use Symfony'Bundle'FrameworkBundle'Controller'Controller;
use Sensio'Bundle'FrameworkExtraBundle'Configuration'Method;
use Sensio'Bundle'FrameworkExtraBundle'Configuration'Route;
use Sensio'Bundle'FrameworkExtraBundle'Configuration'Template;
use AppBundle'Entity'Item;
use AppBundle'Form'ItemType;
/**
* Item controller.
*
* @Route("/item")
*/
class ItemController extends Controller
{
/**
* Lists all Item entities.
*
* @Route("/", name="item")
* @Method("GET")
* @Template()
*/
public function indexAction()
{
$em = $this->getDoctrine()->getManager();
$entities = $em->getRepository('AppBundle:Item')->findAll();
return array(
'entities' => $entities,
);
}
/**
* Creates a new Item entity.
*
* @Route("/", name="item_create")
* @Method("POST")
* @Template("AppBundle:Item:new.html.twig")
*/
public function createAction(Request $request)
{
$entity = new Item();
$form = $this->createCreateForm($entity);
$form->handleRequest($request);
if ($form->isValid()) {
$em = $this->getDoctrine()->getManager();
$em->persist($entity);
$em->flush();
return $this->redirect($this->generateUrl('item_show', array('id' => $entity->getId())));
}
return array(
'entity' => $entity,
'form' => $form->createView(),
);
}
/**
* Creates a form to create a Item entity.
*
* @param Item $entity The entity
*
* @return 'Symfony'Component'Form'Form The form
*/
private function createCreateForm(Item $entity)
{
$form = $this->createForm(new ItemType(), $entity, array(
'action' => $this->generateUrl('item_create'),
'method' => 'POST',
));
$form->add('submit', 'submit', array('label' => 'Create'));
return $form;
}
/**
* Displays a form to create a new Item entity.
*
* @Route("/new", name="item_new")
* @Method("GET")
* @Template()
*/
public function newAction()
{
$entity = new Item();
$form = $this->createCreateForm($entity);
return array(
'entity' => $entity,
'form' => $form->createView(),
);
}
/**
* Adds Corresponding Item to Cart
*
* @Route("addAction")
* @Method("GET")
* @Template()
*/
public function addAction($id) {
//this method should just take item out of db and list and add the item to cart
//buy button should be at very bottom of item list form and then use items from add button and
//form should be rendered saying all items (list them out) have been bought.
$em = $this->getDoctrine()->getManager();
$entity = $this->getDoctrine()->getRepository('AppBundle:Item')->find($id);
if (!$item) {
throw $this->createNotFoundException('No Item ');
}
$query = $em->createQuery(
'SELECT items as $id
FROM AppBundle:Item'
);
}
/**
* Creates a form for buying items
*
* @param Item $entity The entity
*
* @return 'Symfony'Component'Form'Form The form
*/
public function createBuyForm(Item $entity) {
$form = $this->createForm(new ItemType(), $entity, array(
'action' => $this->generateUrl('item_buy', array('id' => $entity->getId())),
'method' => 'PUT',
));
$form->add('submit', 'submit', array('label' => 'Buy'));
return $form;
}
/**
* Finds and displays an Item entity.
*
* @Route("/{id}", name="item_show")
* @Method("GET")
* @Template()
*/
public function showAction($id)
{
$em = $this->getDoctrine()->getManager();
$entity = $em->getRepository('AppBundle:Item')->find($id);
if (!$entity) {
throw $this->createNotFoundException('Unable to find Item entity.');
}
$deleteForm = $this->createDeleteForm($id);
return array(
'entity' => $entity,
'delete_form' => $deleteForm->createView(),
);
}
/**
* Displays a form to edit an existing Item entity.
*
* @Route("/{id}/edit", name="item_edit")
* @Method("GET")
* @Template()
*/
public function editAction($id)
{
$em = $this->getDoctrine()->getManager();
$entity = $em->getRepository('AppBundle:Item')->find($id);
if (!$entity) {
throw $this->createNotFoundException('Unable to find Item entity.');
}
$editForm = $this->createEditForm($entity);
$deleteForm = $this->createDeleteForm($id);
return array(
'entity' => $entity,
'edit_form' => $editForm->createView(),
'delete_form' => $deleteForm->createView(),
);
}
/**
* Creates a form to edit a Item entity.
*
* @param Item $entity The entity
*
* @return 'Symfony'Component'Form'Form The form
*/
private function createEditForm(Item $entity)
{
$form = $this->createForm(new ItemType(), $entity, array(
'action' => $this->generateUrl('item_update', array('id' => $entity->getId())),
'method' => 'PUT',
));
$form->add('submit', 'submit', array('label' => 'Update'));
return $form;
}
/**
* Edits an existing Item entity.
*
* @Route("/{id}", name="item_update")
* @Method("PUT")
* @Template("AppBundle:Item:edit.html.twig")
*/
public function updateAction(Request $request, $id)
{
$em = $this->getDoctrine()->getManager();
$entity = $em->getRepository('AppBundle:Item')->find($id);
if (!$entity) {
throw $this->createNotFoundException('Unable to find Item entity.');
}
$deleteForm = $this->createDeleteForm($id);
$editForm = $this->createEditForm($entity);
$editForm->handleRequest($request);
if ($editForm->isValid()) {
$em->flush();
return $this->redirect($this->generateUrl('item_edit', array('id' => $id)));
}
return array(
'entity' => $entity,
'edit_form' => $editForm->createView(),
'delete_form' => $deleteForm->createView(),
);
}
/**
* Deletes a Item entity.
*
* @Route("/{id}", name="item_delete")
* @Method("DELETE")
*/
public function deleteAction(Request $request, $id)
{
$form = $this->createDeleteForm($id);
$form->handleRequest($request);
if ($form->isValid()) {
$em = $this->getDoctrine()->getManager();
$entity = $em->getRepository('AppBundle:Item')->find($id);
if (!$entity) {
throw $this->createNotFoundException('Unable to find Item entity.');
}
$em->remove($entity);
$em->flush();
}
return $this->redirect($this->generateUrl('item'));
}
/**
* Creates a form to delete a Item entity by id.
*
* @param mixed $id The entity id
*
* @return 'Symfony'Component'Form'Form The form
*/
private function createDeleteForm($id)
{
return $this->createFormBuilder()
->setAction($this->generateUrl('item_delete', array('id' => $id)))
->setMethod('DELETE')
->add('submit', 'submit', array('label' => 'Delete'))
->getForm()
;
}
}
/
<?php
namespace AppBundle'Controller;
use Symfony'Component'HttpFoundation'Request;
use Symfony'Bundle'FrameworkBundle'Controller'Controller;
use Sensio'Bundle'FrameworkExtraBundle'Configuration'Method;
use Sensio'Bundle'FrameworkExtraBundle'Configuration'Route;
use Sensio'Bundle'FrameworkExtraBundle'Configuration'Template;
use AppBundle'Entity'Description;
use AppBundle'Form'DescriptionType;
/**
* Description controller.
*
* @Route("/description")
*/
class DescriptionController extends Controller
{
/**
* Lists all Description entities.
*
* @Route("/", name="description")
* @Method("GET")
* @Template()
*/
public function indexAction()
{
$em = $this->getDoctrine()->getManager();
$entities = $em->getRepository('AppBundle:Description')->findAll();
return array(
'entities' => $entities,
);
}
/**
* Creates a new Description entity.
*
* @Route("/", name="description_create")
* @Method("POST")
* @Template("AppBundle:Description:new.html.twig")
*/
public function createAction(Request $request)
{
$entity = new Description();
$form = $this->createCreateForm($entity);
$form->handleRequest($request);
if ($form->isValid()) {
$em = $this->getDoctrine()->getManager();
$em->persist($entity);
$em->flush();
return $this->redirect($this->generateUrl('description_show', array('id' => $entity->getId())));
}
return array(
'entity' => $entity,
'form' => $form->createView(),
);
}
/**
* Creates a form to create a Description entity.
*
* @param Description $entity The entity
*
* @return 'Symfony'Component'Form'Form The form
*/
private function createCreateForm(Description $entity)
{
$form = $this->createForm(new DescriptionType(), $entity, array(
'action' => $this->generateUrl('description_create'),
'method' => 'POST',
));
$form->add('submit', 'submit', array('label' => 'Create'));
return $form;
}
/**
* Displays a form to create a new Description entity.
*
* @Route("/new", name="description_new")
* @Method("GET")
* @Template()
*/
public function newAction()
{
$entity = new Description();
$form = $this->createCreateForm($entity);
return array(
'entity' => $entity,
'form' => $form->createView(),
);
}
/**
* Finds and displays a Description entity.
*
* @Route("/{id}", name="description_show")
* @Method("GET")
* @Template()
*/
public function showAction($id)
{
$em = $this->getDoctrine()->getManager();
$entity = $em->getRepository('AppBundle:Description')->find($id);
if (!$entity) {
throw $this->createNotFoundException('Unable to find Description entity.');
}
$deleteForm = $this->createDeleteForm($id);
return array(
'entity' => $entity,
'delete_form' => $deleteForm->createView(),
);
}
/**
* Displays a form to edit an existing Description entity.
*
* @Route("/{id}/edit", name="description_edit")
* @Method("GET")
* @Template()
*/
public function editAction($id)
{
$em = $this->getDoctrine()->getManager();
$entity = $em->getRepository('AppBundle:Description')->find($id);
if (!$entity) {
throw $this->createNotFoundException('Unable to find Description entity.');
}
$editForm = $this->createEditForm($entity);
$deleteForm = $this->createDeleteForm($id);
return array(
'entity' => $entity,
'edit_form' => $editForm->createView(),
'delete_form' => $deleteForm->createView(),
);
}
/**
* Creates a form to edit a Description entity.
*
* @param Description $entity The entity
*
* @return 'Symfony'Component'Form'Form The form
*/
private function createEditForm(Description $entity)
{
$form = $this->createForm(new DescriptionType(), $entity, array(
'action' => $this->generateUrl('description_update', array('id' => $entity->getId())),
'method' => 'PUT',
));
$form->add('submit', 'submit', array('label' => 'Update'));
return $form;
}
/**
* Edits an existing Description entity.
*
* @Route("/{id}", name="description_update")
* @Method("PUT")
* @Template("AppBundle:Description:edit.html.twig")
*/
public function updateAction(Request $request, $id)
{
$em = $this->getDoctrine()->getManager();
$entity = $em->getRepository('AppBundle:Description')->find($id);
if (!$entity) {
throw $this->createNotFoundException('Unable to find Description entity.');
}
$deleteForm = $this->createDeleteForm($id);
$editForm = $this->createEditForm($entity);
$editForm->handleRequest($request);
if ($editForm->isValid()) {
$em->flush();
return $this->redirect($this->generateUrl('description_edit', array('id' => $id)));
}
return array(
'entity' => $entity,
'edit_form' => $editForm->createView(),
'delete_form' => $deleteForm->createView(),
);
}
/**
* Deletes a Description entity.
*
* @Route("/{id}", name="description_delete")
* @Method("DELETE")
*/
public function deleteAction(Request $request, $id)
{
$form = $this->createDeleteForm($id);
$form->handleRequest($request);
if ($form->isValid()) {
$em = $this->getDoctrine()->getManager();
$entity = $em->getRepository('AppBundle:Description')->find($id);
if (!$entity) {
throw $this->createNotFoundException('Unable to find Description entity.');
}
$em->remove($entity);
$em->flush();
}
return $this->redirect($this->generateUrl('description'));
}
/**
* Creates a form to delete a Description entity by id.
*
* @param mixed $id The entity id
*
* @return 'Symfony'Component'Form'Form The form
*/
private function createDeleteForm($id)
{
return $this->createFormBuilder()
->setAction($this->generateUrl('description_delete', array('id' => $id)))
->setMethod('DELETE')
->add('submit', 'submit', array('label' => 'Delete'))
->getForm()
;
}
}
有几种方法可以将产品添加到数组中。
一种方法是在会话中保存您的产品。这样，您就可以在应用程序的任何部分访问它们.http：//symfony.com/doc/current/components/http_foundation/sessions.html
您可以创建如下会话：
$cart = []; // your currently empty cart array;
$session = $request->getSession();
$session->set('cart', $cart); // assign the cart array to the new session;
正如我所看到的，您添加操作方法，您已经获得了产品。
$entity = $this->getDoctrine()->getRepository('AppBundle:Item')->find($id);
$entity 是根据您传递的变量$id找到的对象(或产品(。
当您拥有产品时，只需按照您想要的方式将其插入阵列即可
例如：
$cart[$entity->getId()] = $entity->getName();
Whitch 创建了一个这样的数组：
Array
(
[1] => ProductName
[2] => ProductName2
)
不要忘记在添加或删除以下内容后更新会话：
$session->set('cart', $cart);
因此，您的最终方法如下所示：
public function addAction($id) {
$em = $this->getDoctrine()->getManager();
$cart = []; // your currently empty cart array;
$session = $request->getSession();
$session->set('cart', $cart); // assign the cart array to the new session;
$entity = $this->getDoctrine()->getRepository('AppBundle:Item')->find($id);
if (!$item) {
throw $this->createNotFoundException('No Item ');
} else {
$cart[$entity->getId()] = $entity->getName();
}
$session->set('cart', $cart);
}