Silverstripe FulltextSearchable转换表引擎在MyISAM

Question

添加的站内搜索功能，当我在Silverstripe启用FullTextSearchable，它的页表转换为默认的MyISAM，但我只需要保留的InnoDB表。 我使用的MySQL版本> 5.6（所以，它支持全文）

Answer 1

全文搜索仅在MyISAM中提供。这是MyISAM对InnoDB的主要优势之一。相关：https://dba.stackexchange.com/questions/1/what-are-the-main-differences-between-innodb-and-myisam

Answer 2

正如您已经指出InnoDB支持从版本MySQL 5.6开始的全文搜索，但随框架附带的MySQLSchemaManager阻止您将InnoDB用于定义具有全文索引的表。也许你可以在GitHub上提出一个问题。你可以（通过扩展MySQLSchemaManager和压倒一切的alterTable()）创建没有此限制自己SchemaManager：

# Compare this to https://github.com/silverstripe/silverstripe-framework/blob/3.5/model/connect/MySQLSchemaManager.php#L100 
class MyCustomSchemaManager extends MySQLSchemaManager 
{ 

    public function alterTable($tableName, $newFields = null, $newIndexes = null, $alteredFields = null, 
           $alteredIndexes = null, $alteredOptions = null, $advancedOptions = null 
    ) { 
     if ($this->isView($tableName)) { 
      $this->alterationMessage(
       sprintf("Table %s not changed as it is a view", $tableName), 
       "changed" 
      ); 
      return; 
     } 
     $alterList = array(); 

     if ($newFields) { 
      foreach ($newFields as $k => $v) { 
       $alterList[] .= "ADD \"$k\" $v"; 
      } 
     } 
     if ($newIndexes) { 
      foreach ($newIndexes as $k => $v) { 
       $alterList[] .= "ADD " . $this->getIndexSqlDefinition($k, $v); 
      } 
     } 
     if ($alteredFields) { 
      foreach ($alteredFields as $k => $v) { 
       $alterList[] .= "CHANGE \"$k\" \"$k\" $v"; 
      } 
     } 
     if ($alteredIndexes) { 
      foreach ($alteredIndexes as $k => $v) { 
       $alterList[] .= "DROP INDEX \"$k\""; 
       $alterList[] .= "ADD " . $this->getIndexSqlDefinition($k, $v); 
      } 
     } 

     $dbID = self::ID; 
     if ($alteredOptions && isset($alteredOptions[$dbID])) { 
      $this->query(sprintf("ALTER TABLE \"%s\" %s", $tableName, $alteredOptions[$dbID])); 
      $this->alterationMessage(
       sprintf("Table %s options changed: %s", $tableName, $alteredOptions[$dbID]), 
       "changed" 
      ); 
     } 

     $alterations = implode(",\n", $alterList); 
     $this->query("ALTER TABLE \"$tableName\" $alterations"); 
    } 

} 

然后你可以使用Injector使用您的自定义类：

# Config.yml 
Injector: 
    MySQLSchemaManager: 
    class: MyCustomSchemaManager 

您现在应该能够使用静态create_table_options强制InnoDB引擎，并通过indexes静态创建全文索引。

例子：

# SomePage.php  

/** 
* Force InnoDB database engine. 
* 
* @var array 
*/ 
private static $create_table_options = [ 
    'MySQLDatabase' => 'ENGINE=InnoDB' 
]; 

/** 
* Define what fulltext indexes to create. 
* 
* @var array 
*/ 
private static $indexes = [ 
    'SearchFields' => [ 
     'type' => 'fulltext', 
     'name' => 'SearchFields', 
     'value' => '"MyField", "Tags"', 
    ] 
];