new: [migration] organisation_id added to users

- also, grab the first org for a default

config/Migrations/20211123152707_user_org.php

@@ -0,0 +1,43 @@
+<?php
+declare(strict_types=1);
+
+use Phinx\Migration\AbstractMigration;
+
+final class UserOrg extends AbstractMigration
+{
+    /**
+     * Change Method.
+     *
+     * Write your reversible migrations using this method.
+     *
+     * More information on writing migrations is available here:
+     * https://book.cakephp.org/phinx/0/en/migrations.html#the-change-method
+     *
+     * Remember to call "create()" or "update()" and NOT "save()" when working
+     * with the Table class.
+     */
+    public function change(): void
+    {
+        $exists = $this->hasTable('users');
+        if (!$exists) {
+            $alignments = $this->table('users')
+                ->addColumn('organisation_id', 'integer', [
+                    'default' => null,
+                    'null' => true,
+                    'signed' => false,
+                    'length' => 10
+                ])
+                ->addIndex('org_id')
+                ->update();
+        }
+        $q1 = $this->getQueryBuilder();
+        $org_id = $q1->select(['min(id)'])->from('organisations')->execute()->fetchAll()[0][0];
+        if (!empty($org_id)) {
+            $q2 = $this->getQueryBuilder();
+            $q2->update('users')
+                ->set('organisation_id', $org_id)
+                ->where(['organisation_id IS NULL'])
+                ->execute();
+        }
+    }
+}