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<?php
namespace Engelsystem\Migrations;
use Illuminate\Database\Schema\Blueprint;
use stdClass;
trait ChangesReferences
{
/**
* @param string $fromTable
* @param string $fromColumn
* @param string $targetTable
* @param string $targetColumn
* @param string $type
*/
protected function changeReferences($fromTable, $fromColumn, $targetTable, $targetColumn, $type)
{
$references = $this->getReferencingTables($fromTable, $fromColumn);
foreach ($references as $reference) {
/** @var stdClass $reference */
$this->schema->table($reference->table, function (Blueprint $table) use ($reference) {
$table->dropForeign($reference->constraint);
});
$this->schema->table($reference->table,
function (Blueprint $table) use ($reference, $targetTable, $targetColumn, $type) {
$table->{$type}($reference->column)->change();
$table->foreign($reference->column)
->references($targetColumn)->on($targetTable)
->onDelete('cascade');
});
}
}
/**
* @param string $table
* @param string $column
* @return array
*/
protected function getReferencingTables($table, $column): array
{
return $this->schema
->getConnection()
->select(
'
SELECT
`TABLE_NAME` as "table",
`COLUMN_NAME` as "column",
`CONSTRAINT_NAME` as "constraint"
FROM information_schema.KEY_COLUMN_USAGE
WHERE REFERENCED_TABLE_SCHEMA = ?
AND REFERENCED_TABLE_NAME = ?
AND REFERENCED_COLUMN_NAME = ?
',
[
$this->schema->getConnection()->getDatabaseName(),
$table,
$column,
]
);
}
}
|
