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
– zahid hasan emon, Commented Oct 24, 2019 at 7:03
@zahidhasanemon yes When I first create this migration I added nullable(). Now I want it to add to those columns too. — Gayal Seneviratne
– Gayal Seneviratne, Commented Oct 24, 2019 at 7:13
Does this answer your question? Laravel Migration Change to Make a Column Nullable — miken32
– miken32, Commented Nov 19, 2020 at 4:42

nmfzone · Accepted Answer · 2019-10-24 07:21:27Z

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();
        });
    }
}

raza9798 · Accepted Answer · 2020-12-01 15:12:53Z

3

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

edited Dec 1, 2020 at 15:12

raza9798

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answered Oct 24, 2019 at 7:15

Lijesh Shakya

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1 Comment

raza9798 Over a year ago

composer require doctrine/dbal installation of this package is required to complete your answer

alprnkeskekoglu · Accepted Answer · 2019-10-24 07:03:47Z

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, 2019 at 7:03

alprnkeskekoglu

3282 silver badges8 bronze badges

2 Comments

Gayal Seneviratne Over a year ago

@alprnkesskekoglu should I write this inside the "up" function?

alprnkeskekoglu Over a year ago

i forget it sorry... you need write inside the "up" function

Rashid Ashraf · Accepted Answer · 2019-10-24 07:19:32Z

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, 2019 at 7:19

answered Oct 24, 2019 at 7:02

Rashid Ashraf

564 bronze badges

2 Comments

Gayal Seneviratne Over a year ago

@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?

raza9798 Over a year ago

to update a table composer require doctrine/dbal this package is required

user16077187 · Accepted Answer · 2021-05-30 14:51:24Z

0

$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();

answered May 30, 2021 at 14:51

user16077187

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