Scary scary migration

We don’t actually drop the company_id field here, but later code will stop using it on the users table. This migration creates and populates the pivot table

database/migrations/2026_05_19_000001_create_company_user_table.php

@@ -0,0 +1,38 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('company_user', function (Blueprint $table) {
+            $table->id();
+            $table->unsignedInteger('company_id')->index();
+            $table->unsignedInteger('user_id')->index();
+            $table->timestamps();
+            $table->unique(['company_id', 'user_id']);
+        });
+
+        // Seed pivot from existing users.company_id values
+        DB::table('users')
+            ->whereNotNull('company_id')
+            ->orderBy('id')
+            ->each(function ($user) {
+                DB::table('company_user')->insertOrIgnore([
+                    'company_id' => $user->company_id,
+                    'user_id' => $user->id,
+                    'created_at' => now(),
+                    'updated_at' => now(),
+                ]);
+            });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('company_user');
+    }
+};