mirror of
https://github.com/wallabag/wallabag.git
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97 lines
3 KiB
PHP
97 lines
3 KiB
PHP
<?php
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namespace Application\Migrations;
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use Doctrine\DBAL\Platforms\SqlitePlatform;
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use Doctrine\DBAL\Schema\Schema;
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use Wallabag\CoreBundle\Doctrine\WallabagMigration;
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/**
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* Changed tags to lowercase.
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*/
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class Version20170719231144 extends WallabagMigration
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{
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public function up(Schema $schema): void
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{
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if ($this->connection->getDatabasePlatform() instanceof SqlitePlatform) {
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$this->write('Migration can only be executed safely on \'mysql\' or \'postgresql\'.');
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return;
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}
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// Find tags which need to be merged
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$dupTags = $this->connection->query('
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SELECT LOWER(label) AS lower_label
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FROM ' . $this->getTable('tag') . '
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GROUP BY LOWER(label)
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HAVING COUNT(*) > 1'
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);
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foreach ($dupTags->fetchAllAssociative() as $duplicates) {
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$label = $duplicates['lower_label'];
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// Retrieve all duplicate tags for a given tag
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$tags = $this->connection->query('
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SELECT id
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FROM ' . $this->getTable('tag') . '
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WHERE LOWER(label) = :label
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ORDER BY id ASC',
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[
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'label' => $label,
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]
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);
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$first = true;
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$newId = null;
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$ids = [];
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foreach ($tags->fetchAllAssociative() as $tag) {
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// Ignore the first tag as we use it as the new reference tag
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if ($first) {
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$first = false;
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$newId = $tag['id'];
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} else {
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$ids[] = $tag['id'];
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}
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}
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// Just in case...
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if (\count($ids) > 0) {
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// Merge tags
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$this->addSql('
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UPDATE ' . $this->getTable('entry_tag') . '
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SET tag_id = ' . $newId . '
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WHERE tag_id IN (' . implode(',', $ids) . ')
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AND entry_id NOT IN (
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SELECT entry_id
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FROM (SELECT * FROM ' . $this->getTable('entry_tag') . ') AS _entry_tag
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WHERE tag_id = ' . $newId . '
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)'
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);
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// Delete links to unused tags
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$this->addSql('
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DELETE FROM ' . $this->getTable('entry_tag') . '
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WHERE tag_id IN (' . implode(',', $ids) . ')'
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);
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// Delete unused tags
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$this->addSql('
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DELETE FROM ' . $this->getTable('tag') . '
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WHERE id IN (' . implode(',', $ids) . ')'
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);
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}
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}
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// Iterate over all tags to lowercase them
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$this->addSql('
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UPDATE ' . $this->getTable('tag') . '
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SET label = LOWER(label)'
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);
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}
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public function down(Schema $schema): void
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{
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throw new SkipMigrationException('Too complex ...');
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}
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}
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