add file model

database/migrations/2019_11_28_035156_create_files_table.php

@@ -0,0 +1,37 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateFilesTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('files', function (Blueprint $table) {
+            $table->bigIncrements('id');
+            $table->timestamps();
+
+            $table->unsignedBigInteger('iid');
+            $table->string('hash');
+
+
+            $table->foreign('iid')->references('iid')->on('items');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('file');
+    }
+}