How to change database column 'null' to 'nullable' using laravel migration in mysql?

Question

This is my vehicles table. I want to change my database structure by using a migration


use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateVehiclesTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('vehicles', function (Blueprint $table) {
            $table->increments('id');
            $table->string('image')->nullable();
            $table->string('reg_no')->unique();
            $table->string('fuel_type');
            $table->string('capacity');
            $table->double('rate');
            $table->boolean('req_carrier');
            $table->date('service_date');
            $table->integer('service_freq_km');
            $table->integer('service_freq_months');
            $table->date('insurance_date');
            $table->integer('insurance_freq_months');
            $table->date('eco_date');
            $table->integer('eco_freq_months');
            $table->date('licence_date');
            $table->integer('licence_freq_months');
            $table->integer('current_company');
            $table->string('status')->default("available");
            $table->timestampsTz();

        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('vehicles');
    }
}

I want to give nullable values to these columns. 1.service_date 2.service_freq_km 3.service_freq_months

How can I alter these columns as nullable in mysql?

you are already using `nullable()` for image column. use it for those column which you want to be null as default. — zahid hasan emon, Oct 24 '19 at 07:03
@zahidhasanemon yes When I first create this migration I added nullable(). Now I want it to add to those columns too. — Gayal Seneviratne, Oct 24 '19 at 07:13
Does this answer your question? [Laravel Migration Change to Make a Column Nullable](https://stackoverflow.com/questions/24419999/laravel-migration-change-to-make-a-column-nullable) — miken32, Nov 19 '20 at 04:42

score 5 · Accepted Answer · answered Oct 24 '19 at 07:21

You can read the docs about Modifying Columns.

If you want these feature, you need to install this package first:

composer require doctrine/dbal

Then, you need to create another migration, for example:

2019_10_24_xxxxxx_change_columns_to_nullable_in_vehicles.php

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class ChangeColumnsToNullableInVehicles extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::table('vehicles', function (Blueprint $table) {
            $table->date('service_date')->nullable()->change();
            $table->integer('service_freq_km')->nullable()->change();
            $table->integer('service_freq_months')->nullable()->change();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::table('vehicles', function (Blueprint $table) {
            $table->date('service_date')->nullable(false)->change();
            $table->integer('service_freq_km')->nullable(false)->change();
            $table->integer('service_freq_months')->nullable(false)->change();
        });
    }
}

score 3 · Answer 2 · edited Dec 01 '20 at 15:12

install the package in order to update the tables composer require doctrine/dbal

Since you have migrated the migration files, you now need to create a new migration file using artisan command:

php artisan make:migration change_nullable_field_columns_to_vehicles_tables --table=vehicles

In newly created migration file, add the following codes

public function up() {
        Schema::table('vehicles', function (Blueprint $table) {
            $table->date('service_date')->nullable()->change();
            $table->integer('service_freq_km')->nullable()->change();
            $table->integer('service_freq_months')->nullable()->change();
        });
    }

//For php artisan down

public function down(){
            Schema::table('vehicles', function (Blueprint $table) {
                $table->date('service_date')->nullable(false)->change();
                $table->integer('service_freq_km')->nullable(false)->change();
                $table->integer('service_freq_months')->nullable(false)->change();
            });
}

Now you can execute migrate command

php artisan migrate

`composer require doctrine/dbal` installation of this package is required to complete your answer — Mohamed Raza, Dec 01 '20 at 12:44

Rashid Ashraf · Answer 3 · 2019-10-24T07:19:32.217

0

create new migration class for alter table and use this up function

public function up()
{
    Schema::table('vehicles', function (Blueprint $table) {
        $table->date('service_date')->nullable();
        $table->integer('service_freq_km')->nullable();
        $table->integer('service_freq_months')->nullable();

   });
}

Schema::table use for alter table and Schema::create is use for create new table

edited Oct 24 '19 at 07:19

answered Oct 24 '19 at 07:02

Rashid Ashraf

56
4

@Rasshid I have already migrated the migration. Now I want to change it as `$table->date('service_date')->nullable();` how can I alter the table? – Gayal Seneviratne Oct 24 '19 at 07:05
to update a table `composer require doctrine/dbal` this package is required – Mohamed Raza Dec 01 '20 at 12:44

score 0 · Answer 4 · answered Oct 24 '19 at 07:03

0

You need to create new migration file that is name "2019_10_24_00000_update_vehicle_tables"

if(Schema::hasTable('vehicles')) {
    Schema::table('vehicles', function($table)
    {
        $table->date('service_date')->nullable();
        $table->integer('service_freq_km')->nullable();
        $table->integer('service_freq_months')->nullable();
    });
}

answered Oct 24 '19 at 07:03

alprnkeskekoglu

288
1
7

@alprnkesskekoglu should I write this inside the "up" function? – Gayal Seneviratne Oct 24 '19 at 07:12
i forget it sorry... you need write inside the "up" function – alprnkeskekoglu Oct 24 '19 at 07:16

score 0 · Answer 5 · answered May 30 '21 at 14:51

$table->string('first_name')->default('DEFAULT');

If the default value is supposed to be null, make it nullable instead.

$table->string('name')->nullable();

$table->string('name')->nullable()->default('NULL');

$table->string('name')->nullable()->default(NULL);

$table->string('name')->nullable()->default();

How to change database column 'null' to 'nullable' using laravel migration in mysql?

5 Answers5