first upload all files

Modules/Review/Database/Migrations/2018_04_18_154028776225_create_reviews_table.php

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+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class CreateReviewsTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('reviews', function (Blueprint $table) {
+            $table->increments('id');
+            $table->integer('reviewer_id')->unsigned()->index()->nullable();
+            $table->integer('product_id')->unsigned()->index();
+            $table->integer('rating');
+            $table->string('reviewer_name');
+            $table->text('comment');
+            $table->boolean('is_approved');
+            $table->timestamps();
+
+            $table->foreign('product_id')->references('id')->on('products')->onDelete('cascade');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('reviews');
+    }
+}