暂存

vendor/illuminate/database/Migrations/Migration.php

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+<?php
+
+namespace Illuminate\Database\Migrations;
+
+abstract class Migration
+{
+    /**
+     * The name of the database connection to use.
+     *
+     * @var string|null
+     */
+    protected $connection;
+
+    /**
+     * Enables, if supported, wrapping the migration within a transaction.
+     *
+     * @var bool
+     */
+    public $withinTransaction = true;
+
+    /**
+     * Get the migration connection name.
+     *
+     * @return string|null
+     */
+    public function getConnection()
+    {
+        return $this->connection;
+    }
+
+    /**
+     * Determine if this migration should run.
+     *
+     * @return bool
+     */
+    public function shouldRun(): bool
+    {
+        return true;
+    }
+}