bug fixing

database/migrations/2018_06_22_072528_add_foreign_key_to_warehouses_table.php

@@ -0,0 +1,37 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class AddForeignKeyToWarehousesTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('warehouses', function (Blueprint $table) {
+            
+            $table->unsignedInteger('com_id');//FK wrn id
+            $table->foreign('com_id')
+                   ->references('id')->on('warehouses')
+                   ->onDelete('cascade');
+
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('warehouses', function (Blueprint $table) {
+            //
+        });
+    }
+}