从zend framework 2中的另一个模块获取数据

Question

我安装了SkeletonApplication，并从ZF2文档创建了默认的相册模块。http://framework.zend.com/manual/2.2/en/user-guide/modules.html

在那之后，我创建了分类模块，比如相册模块。下面是它的字段: category_id和category_name

然后为专辑表添加了额外的字段: cat_id，正如您所理解的，我正在尝试对专辑进行分类。

然后，我将这段代码添加到AlbumForm.php文件中，用于从选择框中选择字段集cat_id

$this->add(array(
    'type' => 'Zend\Form\Element\Select',
    'name' => 'cat_id',
    'options' => array(
            'value_options' => $selectOptions,
        'label' => 'Category',
     ),
)); 

现在，如何将category_name和category_id从另一个类别模块获取到专辑模块？

Answer 1

如果我们能看到你的分类模块文件的代码，那就太好了。

首先，你应该考虑是否真的需要一个新的模块，因为它可能应该在同一个模块中，只是创建新的模型类和新的视图(如果有)。无论如何，在这一点上都无关紧要。

如果你在你的相册模块中使用SkeletonApplication，在Module.php中你会有这样的代码：

 public function getServiceConfig()
    {
        return array(
                'factories' => array(
                        'Album\Model\AlbumTable' =>  function($sm) {
                            $tableGateway = $sm->get('AlbumTableGateway');
                            $table = new AlbumTable($tableGateway);
                            return $table;
                        },
                        'AlbumTableGateway' => function ($sm) {
                            $dbAdapter = $sm->get('Zend\Db\Adapter\Adapter');
                            $resultSetPrototype = new ResultSet();
                            $resultSetPrototype->setArrayObjectPrototype(new Album());
                            return new TableGateway('album', $dbAdapter, null, $resultSetPrototype);
                        },
                ),
        );
    }

然后，您可能为您的类别表创建了类似的内容，例如

 public function getServiceConfig()
    {
        return array(
                'factories' => array(
                        'Category\Model\CategoryTable' =>  function($sm) {
                            $tableGateway = $sm->get('CategoryTableGateway');
                            $table = new CategoryTable($tableGateway);
                            return $table;
                        },
                        'CategoryTableGateway' => function ($sm) {
                            $dbAdapter = $sm->get('Zend\Db\Adapter\Adapter');
                            $resultSetPrototype = new ResultSet();
                            $resultSetPrototype->setArrayObjectPrototype(new Album());
                            return new TableGateway('category', $dbAdapter, null, $resultSetPrototype);
                        },
                ),
        );
    }

如果有很大的不同，请告诉我。

由于所有配置都已合并，因此无论您是否在其他模块中，您的服务管理器都可以在您的控制器中找到Category\Model\CategoryTable。

因此，您必须修改您的AlbumForm类，例如在构造函数中，您可以传递依赖项，例如servicemanager或‘Category\Model’，因此当您需要检索$selectOptions列表时，您可以访问它以进行任何查询。

此外，您可以从samsonasik查看更好的解决方案，但它可能更难理解。

和，你可以从jamescarr中查看这个blog post和code，以获得与你所需的大致相同的结果。它真的很容易理解，而且是一个很好的解决方案。

Answer 2

事实上，你不必为你的分类模型创建一个新的模块，=>把它放到你的相册模块中:)

多个模块并不是一个好主意...每个表一个表太多了:D

在我的先例之后，我看到你仍然有麻烦，我写并注释了所有的代码，这样你就可以更好地理解:)

ServiceManager工厂是一个非常重要的概念，需要很好地理解！

因此，首先必须在module.php文件中进行工厂配置：

namespace Album;

use Zend\Db\ResultSet\ResultSet;
use Zend\Db\TableGateway\TableGateway;

use Album\Model\Album;
use Album\Model\AlbumTable;
use Album\Model\Category;
use Album\Model\CategoryTable;

class Module
{

    public function getServiceConfig()
    {
        return array (
            'factories' => array(
                //here already the AlbumTable config

                // here begin the categoryTable factory
                'Album\Model\CategoryTable' =>  function($sm)
                {
                    //get the tableGateway just below in his own factory
                    $tableGateway = $sm->get('CategoryTableGateway');
                    //inject the tableGateway in the Table
                    $table = new CategoryTable($tableGateway);
                    return $table;
                },
                //here is the tableGateway Factory for the category
                'CategoryTableGateway' => function($sm)
                {
                    //get adapter to donnect dataBase
                    $dbAdapter = $sm->get('Zend\Db\Adapter\Adapter');
                    // create a resultSet
                    $resultSetPrototype = new ResultSet();
                    //define the prototype of the resultSet 
                    // => what object will be cloned to get the results
                    $resultSetPrototype->setArrayObjectPrototype(new Category());
                    //here you define your database table (category) 
                    //when you return the tableGateway to the CategoryTable factory
                    return new TableGateway('category', $dbAdapter, null, $resultSetPrototype);
                },
            ),
        ),
    }
}

在模块/相册/源/相册/模型中创建Category.php文件：

namespace Album\Model;

class Category
{
    public $id;
    public $name;

    public function exchangeArray(){
        $this->id     = (isset($data['id'])) ? $data['id'] : null;
        $this->name = (isset($data['name'])) ? $data['name'] : null;
    }

}

在同一文件夹中创建CategoryTable.php文件(选择输入只需要fetchAll()方法，您只需要所有类别的列表)

namespace Album\Model;

use Zend\Db\TableGateway\TableGateway;

use Album\Model\Category;

class CategoryTable
{
    protected $tableGateway;

    public function __construct(TableGateway $tableGateway)
     {
         $this->tableGateway = $tableGateway;
     }

     public function fetchAll()
     {
         $resultSet = $this->tableGateway->select();
         return $resultSet;
     }


     public function getCategory($id){
        // ...
     }

    public function saveCategory(Category $category)
    {
       // ...
    }

     public function deleteCategory($id)
     {       
        // ...
     }
}

不要忘了在您的AlbumTable::saveAlbum()方法中添加新的cat_id字段;)

在相册/表单文件夹中创建表单和他的过滤器

namespace Album\Form;

class AlbumForm{
    public function __construct($cat_options){

        $this->add(array(
            'name' => 'id',
            'required' => false,
            'type' => 'hidden',
        ));

        $this->add(array(
            'name' => 'cat_id',
            'required' => true,
            'type' => 'Select',
            'options' => array(
                'value_options' => $cat_options,
                'label' => 'Category',
            )
            'attributes' => array(
                'value' => 3, // to select a default value
            )
        ));
        //and the rest of the form
         $this->add(array(
            'name' => 'submit',
            'type' => 'Submit',
            'attributes' => array(
                'id' => 'submitbutton',
                'value' => 'Go',
            ),
        ));
    }
}

请注意，我将过滤器放在一个特定的类中，即窗体所在的同一名称空间中。当你在一个模块中有很多表单和模型时，=>会更容易找到…=>我更喜欢这样，所以我重新注释它:D =>对于同一模型，您可以有几个表单，例如注册、登录和resetPassword表单，所有这些表单都用于相同的User类

namespace Album\Form;

use Zend\InputFilter\InputFilter;
use Zend\InputFilter\InputFilterAwareInterface;

class AlbumFilter implements InputFilterAwareInterface
{
    protected $inputFilter;

    public function setInputFilter(InputFilterInterface $inputFilter)
    {
        throw new \Exception("Not used");
    }

    public function getInputFilter()
    {
        if(!$this->inputFilter)
        {
            $inputFilter = new InputFilter();

            $inputFilter->add(array(
                'name'     => 'id',
                'required' => false,
                'filters'  => array(
                    array('name' => 'Int'),
                ),
            ));
            $inputFilter->add(array(
                'name'     => 'cat_id',
                'required' => true,
                'filters'  => array(
                    array('name' => 'Int'),
                ),
            ));

            $inputFilter->add(array(
                'name'     => 'artist',
                'required' => true,
                'filters'  => array(
                    array('name' => 'StripTags'),
                    array('name' => 'StringTrim'),
                ),
                'validators' => array(
                    array(
                        'name'    => 'StringLength',
                        'options' => array(
                            'encoding' => 'UTF-8',
                            'min'      => 1,
                            'max'      => 45,
                        ),
                    ),
                ),
            ));

            $inputFilter->add(array(
                'name'     => 'title',
                'required' => true,
                'filters'  => array(
                    array('name' => 'StripTags'),
                    array('name' => 'StringTrim'),
                ),
                'validators' => array(
                    array(
                        'name'    => 'StringLength',
                        'options' => array(
                            'encoding' => 'UTF-8',
                            'min'      => 1,
                            'max'      => 45,
                        ),
                    ),
                ),
            ));
            $this->inputFilter = $inputFilter;
        }
        return $this->inputFilter;
    }

}

现在一切都配置好了，让Controller :)

namespace Album\Controller;

use Zend\Mvc\Controller\AbstractActionController;
use Album\Model\Album;
use Album\Form\AlbumForm;

class MyControler extends AbstractActionController
{
    private $CategoryTable;

    public function getAlbumsTable(){
        if(!$this->Album){
            // get AlbumTable from the ServiceLocator factory (defined in Module.php)
            $this->Album = $this->getServiceLocator()
                ->get('Album\Model\AlbumTable'); 
        }
    }

    public function getCategoryTable(){
        if(!$this->CategoryTable){
            $this->CategoryTable = $this->getServiceLocator()
                ->get('Album\Model\CategoryTable');
        }
    }

    public function addAction(){
        //get the categories from the database
        $categories = $this->getCategoryTable()->fetchall();

        //make an array from the resultSet
            // you can do it as well in your controller
            //or in your form class like I did in my yersterday's answer
        $cat_options = array();
            foreach ($categories as $category) {
                $cat_options[$category->id]=$category->name;
            }

        //create your form with category list as parameter
        $form = new AlbumForm($cat_options);
        //here I recomend to create a specific class for you filters
        // and not put it in your Album class as describe in the zf tutorial

        // => so you can have several forms using the same Model
        // and it is more easy to find on the form folder ;)
        $filter = new AlbumFilter();
        //inject InputFilter in your form
        $form->setInputFilter($filter->getInputFilter());
        //inject data in form
        $form->setData($request->getPost());
        //check the form validity (data vs filters)
        if($form->isValid()){
            //create a new album
            $album = new Album();  
            //hydrate your Album
            $album->exchangeArray($form->getData());
            //ask the albumsTable to save album in the database
            $this->albumsTable->saveAlbum($album);

            //here you can redirect to the Album list
            $this->redirect()->toRoute('Album');
        }
        //call the viewModel if first time you see the page
        // or if validation errors of the form.
        return array('form' =>$form);
    }
}

然后你只需要让你的观点...我不会冒犯你把这段代码放在这里;)

如果您仍然需要在应用程序中创建多个模块，则可以使用getobjectTable()方法调用控制器中的任何表，使用工厂:正如卡洛斯所说，getServiceConfig()数组全部合并为一个，因此您可以从应用程序中的任何位置获取任何表:)