動態在現有的表上飛CakePHP中添加列3

Question

我想在我現有的表中添加的CakePHP 3列

我ContactsTable.php文件代碼：

<?php 
namespace App\Model\Table; 
use Cake\ORM\Table; 
use Migrations\AbstractMigration; 

class ContactsTable extends Table 
{ 
    public function initialize(array $config) 
    { 
     $this->addBehavior('Timestamp'); 
     $table = $this->table('contacts'); 
     $table->addColumn('price', 'decimal')->update(); 

    } 
} 

我試圖描述在CakePHP 3文檔中，但我得到了這個錯誤：

Call to a member function addColumn() on a non-object

如何通過控制器實時添加列？

Answer 1

代碼：

<?php 

namespace App\Controller; 

use Cake\Core\Configure; 
use Cake\Network\Exception\NotFoundException; 
use Cake\View\Exception\MissingTemplateException; 
use Cake\ORM\TableRegistry; 
use Cake\Database\Schema\Table; 
use Cake\Datasource\ConnectionManager; 
use \Migrations\AbstractMigration as AbstractMigration; 
use \Phinx\Db\Adapter\MysqlAdapter as MysqlAdapter; 

class PagesController extends AppController 
{ 
    public function display() 
    { 
     $connectionArray = ConnectionManager::get('default')->config(); 
     $connectionArray['pass'] = $connectionArray['password']; 
     $connectionArray['user'] = $connectionArray['username']; 
     $connectionArray['name'] = $connectionArray['database']; 

     $migrationObject = new AbstractMigration(mt_rand()); 
     $migrationObject->setAdapter(new MysqlAdapter($connectionArray)); 
     $tree = $migrationObject->table('tests'); 


     $tree->addColumn('something', 'text') 
         ->update(); 
    } 
} 

黑客的幾個小時後，終於找到了一種方法來做到這一點上即時。

經測試，在默認的CakePHP 3（最新 - 截至今天 - 6月2日'16）

如果您使用的是不同的數據庫適配器，將其更改爲從MysqlAdapter該adapater。

Note to the users:

• This is an ugly hack and should be used ONLY if you do not work in an organization where each migration commit requires peer reference.

• mt_rand() must NEVER be used as a version number hack.

• There is no canonical way of doing it via the controllers. Update in a datasource MUST always be done modified via migrations - using a proper structure.

• Refer to Running Migrations in a non-shell environment and try to create a migrations logs under /config/migrations , that would be more rule-specific-on-the-fly and you will also have logs for peers to review.

Answer 2

如果你想新列添加到產品表e.g的「價格」，價格是一個「小數」你應該去你的項目，並在控制檯中這樣寫：

bin/cake bake migration AddPriceToProducts price:decimal 

可以如看到一個新的文件配置/遷移/ 20160501190410_AddPriceToProducts.php

<?php 
use Migrations\AbstractMigration; 

class AddPriceToProducts extends AbstractMigration 
{ 
    /** 
    * Change Method. 
    * 
    * More information on this method is available here: 
    * http://docs.phinx.org/en/latest/migrations.html#the-change-method 
    * @return void 
    */ 
    public function change() 
    { 
     $table = $this->table('products'); 
     $table->addColumn('price', 'decimal', [ 
      'default' => null, 
      ... 
      'null' => true, 
     ]); 
     $table->update(); 
    } 
} 

後來剛推出來遷移到這個列添加到數據的基礎上，在控制檯寫：

bin/cake migrations migrate 

Answer 3

遷移插件還支持Running Migrations in a non-shell environment。

Since the release of version 1.2 of the migrations plugin, you can run migrations from a non-shell environment, directly from an app, by using the new Migrations class. This can be handy in case you are developing a plugin installer for a CMS for instance. The Migrations class allows you to run the following commands from the migrations shell: migrate , rollback , markMigrated , status and seed .

Each of these commands has a method defined in the Migrations class.

您可以準備一些自定義處理程序，它將接受來自用戶端的列數據並運行遷移。在這種情況下，它可能是name和type輸入的某種形式。提交數據後，遷移將應用於數據庫。

這裏是如何使用它：

use Migrations\Migrations; 

$migrations = new Migrations(); 

// Will return an array of all migrations and their status 
$status = $migrations->status(); 

// Will return true if success. If an error occurred, an exception will be thrown 
$migrate = $migrations->migrate(); 

// Will return true if success. If an error occurred, an exception will be thrown 
$rollback = $migrations->rollback(); 

// Will return true if success. If an error occurred, an exception will be thrown 
$markMigrated = $migrations->markMigrated(20150804222900); 

// Will return true if success. If an error occurred, an exception will be thrown 
$seeded = $migrations->seed();