To add a field that can have a value of null in a CodeIgniter 4 migration, you can specify the field as nullable. The 'null' => true option in the field definition specifies that the field can have a null value.
Source code viewer
namespace App\Database\Migrations;
use CodeIgniter\Database\Migration;
class Add_nullable_field_migration extends Migration
{
public function up()
{
// Add the new field with nullable option
$fields = [
'new_field' => [
'type' => 'VARCHAR',
'constraint' => 100,
'null' => true, // This specifies that the field can have a null value
],
];
$this->forge->addColumn('your_table_name', $fields);
}
public function down()
{
// Drop the field if you need to rollback the migration
$this->forge->dropColumn('your_table_name', 'new_field');
}
}Programming Language: PHP