add attachments structure

database/migrations/2023_02_24_023054_create_attachments_table.php

@@ -0,0 +1,35 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('attachments', function (Blueprint $table) {
+            $table->id();
+            $table->uuid('media_id');
+            $table->uuidMorphs('attachable');
+            $table->timestamps();
+
+            $table->foreign('media_id')->references('id')->on('media')->onDelete('cascade');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('media_attachments');
+    }
+};