fixed warehouses FK relation error

database/migrations/2018_06_22_072528_add_foreign_key_to_warehouses_table.php

@@ -21,6 +21,7 @@ class AddForeignKeyToWarehousesTable extends Migration
                    ->onDelete('cascade');
 
         });
+
     }
 
     /**

database/migrations/2018_06_26_082438_drop_com__id_for_warehouses_table.php

@@ -0,0 +1,35 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class DropComIdForWarehousesTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('warehouses', function (Blueprint $table) {
+           
+            $table->dropForeign(['com_id']);
+            $table->dropColumn('com_id');
+             
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('warehouses', function (Blueprint $table) {
+            //
+        });
+    }
+}

database/migrations/2018_06_26_083014_change_reference_id_for_warehouses_table.php

@@ -0,0 +1,38 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class ChangeReferenceIdForWarehousesTable 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('companies')
+                   ->onDelete('cascade');
+
+
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('warehouses', function (Blueprint $table) {
+            //
+        });
+    }
+}