如何制作学说支持时间戳列？

Question

我想申请以下迁移：

Schema::table('users', function (Blueprint $table) { 
    $table->timestamp('created_at')->useCurrent()->change(); 
}); 

但artisan说：

[Doctrine\DBAL\DBALException] 
    Unknown column type "timestamp" requested. Any Doctrine type that you use has to be registered with \Doctrine\DBAL 
    \Types\Type::addType(). You can get a list of all the known types with \Doctrine\DBAL\Types\Type::getTypesMap(). I 
    f this error occurs during database introspection then you might have forgot to register all database types for a 
    Doctrine Type. Use AbstractPlatform#registerDoctrineTypeMapping() or have your custom types implement Type#getMapp 
    edDatabaseTypes(). If the type name is empty you might have a problem with the cache or forgot some mapping inform 
    ation. 

当我尝试安装mmerian/doctrine-timestamp（composer install mmerian/doctrine-timestamp），composer说：

[InvalidArgumentException] 
    Could not find package mmerian/doctrine-timestamp at any version for your minimum-stability (stable). Check the pa 
    ckage spelling or your minimum-stability 

我该怎么办？

UPD随着composer require mmerian/doctrine-timestamp=dev-master，我能够安装包，然后才Schema::table声明说Type::addType('timestamp', 'DoctrineTimestamp\DBAL\Types\Timestamp');，但现在我已经得到了其他错误：

[Illuminate\Database\QueryException] 
    SQLSTATE[42000]: Syntax error or access violation: 1067 Invalid default value for 'created_at' (SQL: ALTER TABLE u 
    sers CHANGE created_at created_at INT DEFAULT 'CURRENT_TIMESTAMP' NOT NULL) 

UPD如果我再次检查与mmerian/doctrine-timestamp一起使用，因为当时我只在文档中添加了第一行（或文档已更新）：

Type::addType('timestamp', 'DoctrineTimestamp\DBAL\Types\Timestamp');           
DB::getDoctrineConnection()->getDatabasePlatform()->registerDoctrineTypeMapping('Timestamp', 'timestamp'); 

但它并没有帮助。迁移成功，但列定义不会更改。

Answer 1

人们可以看到，mmerian/doctrine-timestamp不解决问题。首先，this line后$table->getColumns()['created_at']是

class Doctrine\DBAL\Schema\Column#520 (16) { 
    protected $_type => class Doctrine\DBAL\Types\DateTimeType#504 (0) { } 
    protected $_length => NULL 
    protected $_precision => int(10) 
    protected $_scale => int(0) 
    protected $_unsigned => bool(false) 
    protected $_fixed => bool(false) 
    protected $_notnull => bool(true) 
    protected $_default => string(17) "CURRENT_TIMESTAMP" 
    protected $_autoincrement => bool(false) 
    protected $_platformOptions => array(0) { } 
    protected $_columnDefinition => NULL 
    protected $_comment => NULL 
    protected $_customSchemaOptions => array(0) { } 
    protected $_name => string(10) "created_at" 
    protected $_namespace => NULL 
    protected $_quoted => bool(false) 
} 

和$this->getTableWithColumnChanges($blueprint, $table)->getColumns()['created_at']是

class Doctrine\DBAL\Schema\Column#533 (16) { 
    protected $_type => class DoctrineTimestamp\DBAL\Types\Timestamp#513 (0) { } 
    protected $_length => NULL 
    protected $_precision => int(10) 
    protected $_scale => int(0) 
    protected $_unsigned => bool(false) 
    protected $_fixed => bool(false) 
    protected $_notnull => bool(true) 
    protected $_default => string(17) "CURRENT_TIMESTAMP" 
    protected $_autoincrement => bool(false) 
    protected $_platformOptions => array(0) { } 
    protected $_columnDefinition => NULL 
    protected $_comment => NULL 
    protected $_customSchemaOptions => array(0) { } 
    protected $_name => string(10) "created_at" 
    protected $_namespace => NULL 
    protected $_quoted => bool(false) 
} 

所以，首先我看不到有关ON UPDATE一部分在这里。其次，onle的区别是$_type的值。我可以证实this line后，$tableDiff->changedColumns['created_at']->changedProperties是

array(1) { 
    [0] => string(4) "type" 
} 

然后，当generatingALTER TABLEstatement，这一切都归结到这一点

public function getDefaultValueDeclarationSQL($field) 
{ 
    $default = empty($field['notnull']) ? ' DEFAULT NULL' : ''; 
    if (isset($field['default'])) { 
     $default = " DEFAULT '".$field['default']."'"; 
     if (isset($field['type'])) { 
      if (in_array((string) $field['type'], array("Integer", "BigInt", "SmallInt"))) { 
       $default = " DEFAULT ".$field['default']; 
      } elseif (in_array((string) $field['type'], array('DateTime', 'DateTimeTz')) && $field['default'] == $this->getCurrentTimestampSQL()) { 
       $default = " DEFAULT ".$this->getCurrentTimestampSQL(); 
      } elseif ((string) $field['type'] == 'Time' && $field['default'] == $this->getCurrentTimeSQL()) { 
       $default = " DEFAULT ".$this->getCurrentTimeSQL(); 
      } elseif ((string) $field['type'] == 'Date' && $field['default'] == $this->getCurrentDateSQL()) { 
       $default = " DEFAULT ".$this->getCurrentDateSQL(); 
      } elseif ((string) $field['type'] == 'Boolean') { 
       $default = " DEFAULT '" . $this->convertBooleans($field['default']) . "'"; 
      } 
     } 
    } 
    return $default; 
} 

某处周围this line那里应该是为Timestamp型转向检查'CURRENT_TIMESTAMP'分成CURRENT_TIMESTAMP。这可能在mmerian/doctrine-timestamp？这个问题现在是开放的。这个检查很可能会解决我的特殊问题。但现在我要摆脱这样的：

DB::statement('ALTER TABLE users MODIFY COLUMN created_at 
    TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP'); 

Answer 2

设置minimum-stability设置在composer.json dev，因为mmerian/doctrine-timestamp只有dev-master版，例如：

{ 
    "minimum-stability": "dev", 
    "require": { 
     ... 
    } 
} 

Then, when bootstraping your doctrine connection：

Type::addType('timestamp', 'DoctrineTimestamp\DBAL\Types\Timestamp'); 
$conn->getDatabasePlatform()->registerDoctrineTypeMapping('Timestamp', 'timestamp'); 

Answer 3

我建造this它，因为教义并不想支持它，因为它是一个MySQL特有的列类型。

Answer 4

嗨〜你可以使用 “日期时间” 类型：

Schema::table('orders', function ($table) { 

     $table->datetime('pay_time')->nullable()->change(); 

    });