Laravel Migration Change Default Value Example

Hi Dev,

This article is focused on laravel migration change default value. I explained simply about laravel migration set default value. we will help you to give an example of how to change default value in laravel migration. If you have a question about laravel migration alter column default value then I will give a simple example with a solution. So, let us dive into the details.

Laravel migration provides way to add column name and datatype with default value. But if you need to change column default then you have to install doctrine/dbal package to change datatype. In this example i will show you two ways to change default value in laravel migration.

In this example, i will change is_publish column with NULL default value and here we will change NULL to 0 value.

So, let's see the simple example of laravel migration change default value NULL to '0'.

Install doctrine/dbal: optional

First of all we need to install "doctrine/dbal" composer package. This package allow to use change() method to update datatype using laravel migration.

composer require doctrine/dbal

Default Created Table

Here, you will see the default created table screenshot.

Way 1: Create Migration

Create new migration using following command:

php artisan make:migration change_datatype_column

Now, You can update it as like the bellow:

database/migrations/migration_name.php

<?php
   
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;
    
return new class extends Migration
{
    /**
     * Run the migrations.
     */
    public function up(): void
    {
        Schema::table('posts', function (Blueprint $table) {
            $table->integer('is_publish')->default(0)->change();
        });
    }
  
    /**
     * Reverse the migrations.
     */
    public function down(): void
    {
        Schema::table('posts', function (Blueprint $table) {
              
        });
    }
};

Now, you are ready to run migration command:

php artisan migrate

You will see the layout as like the below:

Way 2: Create Migration

Create new migration using following command:

php artisan make:migration change_datatype_column

Now, You can update it as like the bellow:

database/migrations/migration_name.php

<?php
   
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;
    
return new class extends Migration
{
    /**
     * Run the migrations.
     */
    public function up(): void
    {
        \DB::statement('ALTER TABLE `posts` CHANGE `is_publish` `is_publish` INT NULL DEFAULT '0';');
    }
  
    /**
     * Reverse the migrations.
     */
    public function down(): void
    {
        Schema::table('posts', function (Blueprint $table) {
              
        });
    }
};

Now, you are ready to run migration command:

php artisan migrate

I hope it can help you...