Updated Registration Column name and distance achievement units

database/migrations/2026_09_15_045243_update_column_settings.php

@@ -0,0 +1,65 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Support\Facades\DB;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        $this->renameDepartureBoardColumn('registration', 'aircraft_registration');
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        $this->renameDepartureBoardColumn('aircraft_registration', 'registration');
+    }
+
+    /**
+     * Walk every user's settings JSON and rename a value inside
+     * departure_board_columns, if present.
+     */
+    private function renameDepartureBoardColumn(string $from, string $to): void
+    {
+        DB::table('users')
+            ->select('id', 'settings')
+            ->whereNotNull('settings')
+            ->orderBy('id')
+            ->chunkById(500, function ($users) use ($from, $to) {
+                foreach ($users as $user) {
+                    $settings = json_decode($user->settings, true);
+
+                    // Skip rows with malformed/empty JSON rather than blowing up the migration.
+                    if (! is_array($settings) || ! isset($settings['departure_board_columns'])) {
+                        continue;
+                    }
+
+                    if (! is_array($settings['departure_board_columns'])) {
+                        continue;
+                    }
+
+                    $columns = $settings['departure_board_columns'];
+                    $key = array_search($from, $columns, true);
+
+                    if ($key === false) {
+                        continue; // nothing to change for this user
+                    }
+
+                    $columns[$key] = $to;
+                    $settings['departure_board_columns'] = $columns;
+
+                    DB::table('users')
+                        ->where('id', $user->id)
+                        ->update([
+                            'settings' => json_encode($settings),
+                        ]);
+                }
+            });
+    }
+};