How to change enum type column in laravel migration?

Question

I am using Laravel 5.1 and I have a table called packages with this structure:

id              int(11)
weight          decimal(10,2)           
weight_unit     e         


        

Answer 1

This worked for me when adding a new enum value to the modified enum column.

Add the following to the up() method:

DB::statement("ALTER TABLE packages MODIFY weight_unit ENUM('Grams', 'Kgs', 'Pounds', 'new value') NOT NULL");

Then in the down() method you can revert the change that was made:

DB::statement("ALTER TABLE packages MODIFY weight_unit ENUM('Grams', 'Kgs', 'Pounds') NOT NULL");

Note: before the enum value is removed it needs to be changed to another enum value that will be retained.

Answer 2

add this before change() call :

DB::getDoctrineSchemaManager()->getDatabasePlatform()->registerDoctrineTypeMapping('enum', 'string');

Answer 3

Use the DB::statement method:

DB::statement("ALTER TABLE packages MODIFY COLUMN weight_unit ENUM('Grams', 'Kgs', 'Pounds')");

Answer 4

In case you dont want to lose your data and update it with the new values I came up with this solution:

// Include old and new enum values
DB::statement("ALTER TABLE packages MODIFY COLUMN weight_unit ENUM('Kg.', 'Gm.', 'Grams', 'Kgs', 'Pounds')");
// Replace Kg. with Kgs
Packages::where('weight_unit', 'Kg.')->update(['weight_unit' => 'Kgs']);
// Replace Gm. with Grams
Packages::where('weight_unit', 'Gm.')->update(['weight_unit' => 'Grams']);
// Delete old values
DB::statement("ALTER TABLE packages MODIFY COLUMN weight_unit ENUM('Grams', 'Kgs', 'Pounds')");

This way you can replace your old values with the new ones.

Answer 5

You can add custom constructor to migration and explain to Doctrine that enum should be treated like string.

public function __construct(\Doctrine\DBAL\Migrations\Version $version)
{
    parent::__construct($version);

    $this->platform->registerDoctrineTypeMapping('enum', 'string');
}

Answer 6

$table->enum('level', ['easy', 'hard']);