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bd164a75 KD |
1 | <?php |
2 | ||
3 | namespace Application\Migrations; | |
4 | ||
5 | use Doctrine\DBAL\Migrations\AbstractMigration; | |
6 | use Doctrine\DBAL\Schema\Schema; | |
7 | use Symfony\Component\DependencyInjection\ContainerAwareInterface; | |
8 | use Symfony\Component\DependencyInjection\ContainerInterface; | |
9 | ||
10 | /** | |
7b4f6688 | 11 | * Changed tags to lowercase. |
bd164a75 KD |
12 | */ |
13 | class Version20170719231144 extends AbstractMigration implements ContainerAwareInterface | |
14 | { | |
15 | /** | |
16 | * @var ContainerInterface | |
17 | */ | |
18 | private $container; | |
19 | ||
20 | public function setContainer(ContainerInterface $container = null) | |
21 | { | |
22 | $this->container = $container; | |
23 | } | |
24 | ||
bd164a75 KD |
25 | /** |
26 | * @param Schema $schema | |
27 | */ | |
28 | public function up(Schema $schema) | |
29 | { | |
7b4f6688 KD |
30 | $this->skipIf($this->connection->getDatabasePlatform()->getName() === 'sqlite', 'Migration can only be executed safely on \'mysql\' or \'postgresql\'.'); |
31 | ||
bd164a75 | 32 | // Find tags which need to be merged |
7b4f6688 | 33 | $dupTags = $this->connection->query(' |
bd164a75 | 34 | SELECT LOWER(label) |
7b4f6688 | 35 | FROM ' . $this->getTable('tag') . ' |
bd164a75 | 36 | GROUP BY LOWER(label) |
7b4f6688 | 37 | HAVING COUNT(*) > 1' |
bd164a75 KD |
38 | ); |
39 | $dupTags->execute(); | |
40 | ||
41 | foreach ($dupTags->fetchAll() as $duplicates) { | |
42 | $label = $duplicates['LOWER(label)']; | |
43 | ||
44 | // Retrieve all duplicate tags for a given tag | |
7b4f6688 | 45 | $tags = $this->connection->query(' |
bd164a75 | 46 | SELECT id |
7b4f6688 KD |
47 | FROM ' . $this->getTable('tag') . " |
48 | WHERE LOWER(label) = '" . $label . "' | |
bd164a75 KD |
49 | ORDER BY id ASC" |
50 | ); | |
51 | $tags->execute(); | |
52 | ||
53 | $first = true; | |
54 | $newId = null; | |
55 | $ids = []; | |
56 | ||
57 | foreach ($tags->fetchAll() as $tag) { | |
58 | // Ignore the first tag as we use it as the new reference tag | |
59 | if ($first) { | |
60 | $first = false; | |
61 | $newId = $tag['id']; | |
62 | } else { | |
63 | $ids[] = $tag['id']; | |
64 | } | |
65 | } | |
66 | ||
67 | // Just in case... | |
68 | if (count($ids) > 0) { | |
69 | // Merge tags | |
7b4f6688 KD |
70 | $this->addSql(' |
71 | UPDATE ' . $this->getTable('entry_tag') . ' | |
72 | SET tag_id = ' . $newId . ' | |
73 | WHERE tag_id IN (' . implode(',', $ids) . ')' | |
bd164a75 KD |
74 | ); |
75 | ||
76 | // Delete unused tags | |
7b4f6688 KD |
77 | $this->addSql(' |
78 | DELETE FROM ' . $this->getTable('tag') . ' | |
79 | WHERE id IN (' . implode(',', $ids) . ')' | |
bd164a75 KD |
80 | ); |
81 | } | |
82 | } | |
83 | ||
84 | // Iterate over all tags to lowercase them | |
7b4f6688 KD |
85 | $this->addSql(' |
86 | UPDATE ' . $this->getTable('tag') . ' | |
87 | SET label = LOWER(label)' | |
bd164a75 KD |
88 | ); |
89 | } | |
90 | ||
91 | /** | |
92 | * @param Schema $schema | |
93 | */ | |
94 | public function down(Schema $schema) | |
95 | { | |
96 | throw new SkipMigrationException('Too complex ...'); | |
97 | } | |
7b4f6688 KD |
98 | |
99 | private function getTable($tableName) | |
100 | { | |
101 | return $this->container->getParameter('database_table_prefix') . $tableName; | |
102 | } | |
bd164a75 | 103 | } |