fixed #712

database/migrations/2019_01_07_000000_drop_tax_id_column.php

@@ -0,0 +1,40 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class DropTaxIdColumn extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('bill_items', function (Blueprint $table) {
+            $table->dropColumn('tax_id');
+        });
+
+        Schema::table('invoice_items', function (Blueprint $table) {
+            $table->dropColumn('tax_id');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('bill_items', function (Blueprint $table) {
+            $table->integer('tax_id')->default(0);
+        });
+
+        Schema::table('invoice_items', function (Blueprint $table) {
+            $table->integer('tax_id')->default(0);
+        });
+    }
+}