protected function processForeignKeys()
{
/** @var ForeignKey[] $beforeForeignKeys */
$beforeForeignKeys = array();
if (!$this->before->disableForeignKeys) {
foreach ($this->before->getForeignKeys() as $foreignKey) {
$beforeForeignKeys[$foreignKey->getName()] = $foreignKey;
}
}
$afterForeignKeys = $this->after->getForeignKeys();
if ($this->after->disableForeignKeys) {
$afterForeignKeys = array();
}
foreach ($afterForeignKeys as $foreignKey) {
if (!isset($beforeForeignKeys[$foreignKey->getName()])) {
$this->addFkExpression->commaExpr('ADD');
$this->addFkExpression->appendExpr($this->database()->getUtility()->generateForeignKeyExpression($foreignKey));
} else {
unset($beforeForeignKeys[$foreignKey->getName()]);
}
}
foreach ($beforeForeignKeys as $foreignKey) {
$this->alterLines->commaExpr('DROP FOREIGN KEY ?', new Symbol($foreignKey->getName()));
}
}
