Doctrine Migrations with Symfony 3 addIndex not found. Why? - php

Question

I've inherited a Symfony 3 project that had no migrations.
Following the documentation, I added Doctrine Migrations Bundle to Symfony.
$ composer require doctrine/doctrine-migrations-bundle "^1.0"
Added the configuration to config.yml
doctrine_migrations:
dir_name: "%kernel.root_dir%/DoctrineMigrations"
namespace: Application\Migrations
table_name: migration_versions
name: Application Migrations
Then added the loader to appKernel.php
new Doctrine\Bundle\MigrationsBundle\DoctrineMigrationsBundle(),
The console now shows doctrine:migrations:* as available features, so I then generated my migration file
php bin/console doctrine:migrations:generate
Generated new migration class to "/path/to/project/app/DoctrineMigrations/Version20100621140655.php"
Then continued following along with the Doctrine migrations documentation:
public function up(Schema $schema)
{
// alter my table
$options = ['fields' => ['type_id']];
$schema->addIndex('advertiser', 'idx_type_id', $options);
...
}
Now, when I run the migration:
Migrating up to 20170714165306 from 20170714155549
++ migrating 20170714165306
[Symfony\Component\Debug\Exception\UndefinedMethodException]
Attempted to call an undefined method named "addIndex" of class "ProxyManagerGeneratedProxy\__PM__\Doctrine\DBAL\Schema\Schema\Generatedaca9b50393335f8354881e485c485329".
Now when I got that error, I searched on that and found ocramius/ProxyManager. I installed that with
composer require ocramius/proxy-manager "^2.0"
Still got the same error.
Granted, in most of the Doctrine Migrations documentation, I see mainly addSql( 'ALTER TABLE ...') type statements, but I want to use the wrapper methods addIndex, removeIndex, etc.
Can someone explain how to get these features working?

Answer 1

I figured out my problem. The problem is solved by doing the following in the migration file:
public function up(Schema $schema)
{
// alter my table
$table = $schema->getTable('advertiser');
$table->addIndex(['type_id'], 'idx_type_id');
...
}
The basic idea is that you need to grab a reference to the table, and then you can addIndex to the specific column on the table. Contrary to the Doctrine docs, you can't addIndex on a $schema reference passing the table name within a Symfony2/3 migration.