Feature: Adding Custom Fields to Products

database/migrations/2026_09_22_000001_add_custom_fields_to_products_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+/**
+ * Per-product, customer-authored input fields — a personalized-statue
+ * product needing a reference photo upload and an optional engraving
+ * textarea, for example. Deliberately NOT modeled as a Lunar ProductOption
+ * (see Modules\Core\Catalog\Contracts\ProductOptionTypeInterface's own
+ * docblock): an option's values are a fixed, admin-authored list that
+ * define variants (Red/Green/Blue) — a photo upload has no such list, it's
+ * unique per order, and creates no variant at all. This is a genuinely
+ * different concept that happens to configure on the same product page.
+ *
+ * Array of {key, type: 'text'|'textarea'|'file', label, required} — `key`
+ * is what a submitted answer is keyed by in CartLine/OrderLine.meta (both
+ * already have a `meta` json column — see Modules\Core\Cart\Services\
+ * CartService::addLine()'s own $meta parameter), not a new table, since
+ * this is small, rarely-queried per-product config, the same reasoning
+ * ShippingMethod.data/PaymentMethod.data already follow for their own
+ * per-row settings.
+ */
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table(config('lunar.database.table_prefix').'products', function (Blueprint $table) {
+            $table->json('custom_fields')->nullable()->after('attribute_data');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table(config('lunar.database.table_prefix').'products', function (Blueprint $table) {
+            $table->dropColumn('custom_fields');
+        });
+    }
+};