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Implemented getForeignKeys() in DibiMySqlReflector

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Jiří Pudil
2013-07-20 15:52:34 +02:00
committed by David Grudl
parent 32518eca54
commit 5599dde525
1 changed files with 31 additions and 1 deletions
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32
dibi/drivers/DibiMySqlReflector.php
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@@ -115,10 +115,40 @@ class DibiMySqlReflector extends DibiObject implements IDibiReflector
* Returns metadata for all foreign keys in a table.
* @param string
* @return array
* @throws DibiNotSupportedException
*/
public function getForeignKeys($table)
{
throw new DibiNotImplementedException;
$data = $this->driver->query("SELECT `ENGINE` FROM information_schema.TABLES WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = {$this->driver->escape($table, dibi::TEXT)}")->fetch(TRUE);
if ($data['ENGINE'] !== 'InnoDB') {
throw new DibiNotSupportedException("Foreign keys are not supported in {$data['ENGINE']} tables.");
}
$res = $this->driver->query("
SELECT rc.CONSTRAINT_NAME, rc.UPDATE_RULE, rc.DELETE_RULE, kcu.REFERENCED_TABLE_NAME,
GROUP_CONCAT(kcu.REFERENCED_COLUMN_NAME ORDER BY kcu.ORDINAL_POSITION) AS REFERENCED_COLUMNS,
GROUP_CONCAT(kcu.COLUMN_NAME ORDER BY kcu.ORDINAL_POSITION) AS COLUMNS
FROM information_schema.REFERENTIAL_CONSTRAINTS rc
INNER JOIN information_schema.KEY_COLUMN_USAGE kcu ON
kcu.CONSTRAINT_NAME = rc.CONSTRAINT_NAME
AND kcu.CONSTRAINT_SCHEMA = rc.CONSTRAINT_SCHEMA
WHERE rc.CONSTRAINT_SCHEMA = DATABASE()
AND rc.TABLE_NAME = {$this->driver->escape($table, dibi::TEXT)}
GROUP BY rc.CONSTRAINT_NAME
");
$foreignKeys = array();
while ($row = $res->fetch(TRUE)) {
$keyName = $row['CONSTRAINT_NAME'];
$foreignKeys[$keyName]['name'] = $keyName;
$foreignKeys[$keyName]['local'] = explode(",", $row['COLUMNS']);
$foreignKeys[$keyName]['table'] = $row['REFERENCED_TABLE_NAME'];
$foreignKeys[$keyName]['foreign'] = explode(",", $row['REFERENCED_COLUMNS']);
$foreignKeys[$keyName]['onDelete'] = $row['DELETE_RULE'];
$foreignKeys[$keyName]['onUpdate'] = $row['UPDATE_RULE'];
}
return array_values($foreignKeys);
}
}