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<?php |
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declare(strict_types=1); |
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namespace DoctrineMigrations; |
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use Doctrine\DBAL\Schema\Schema; |
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use Doctrine\Migrations\AbstractMigration; |
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/** |
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* Auto-generated Migration: Please modify to your needs! |
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*/ |
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final class Version20210424131056 extends AbstractMigration |
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{ |
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public function getDescription() : string |
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{ |
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return ''; |
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} |
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public function up(Schema $schema) : void |
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{ |
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// this up() migration is auto-generated, please modify it to your needs |
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$this->addSql('CREATE TABLE image_tag (image_id INT NOT NULL, tag_id INT NOT NULL, INDEX IDX_5B6367D03DA5256D (image_id), INDEX IDX_5B6367D0BAD26311 (tag_id), PRIMARY KEY(image_id, tag_id)) DEFAULT CHARACTER SET utf8mb4 COLLATE `utf8mb4_unicode_ci` ENGINE = InnoDB'); |
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$this->addSql('ALTER TABLE image_tag ADD CONSTRAINT FK_5B6367D03DA5256D FOREIGN KEY (image_id) REFERENCES image (id) ON DELETE CASCADE'); |
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$this->addSql('ALTER TABLE image_tag ADD CONSTRAINT FK_5B6367D0BAD26311 FOREIGN KEY (tag_id) REFERENCES tag (id) ON DELETE CASCADE'); |
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} |
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public function down(Schema $schema) : void |
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{ |
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// this down() migration is auto-generated, please modify it to your needs |
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$this->addSql('DROP TABLE image_tag'); |
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} |
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public function postUp(Schema $schema): void |
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{ |
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$images = $this->connection->fetchAllAssociative('SELECT id, keywords FROM image'); |
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// First, gather unique keywords |
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$allKeywords = []; |
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foreach ($images as $image) { |
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$keywords = unserialize($image['keywords']); |
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$allKeywords = array_merge($allKeywords, $keywords); |
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} |
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$unique_keywords = array_unique($allKeywords); |
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$insertTagStmt = $this->connection->prepare('INSERT INTO tag (name) VALUES (:name)'); |
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// Insert our unique tags into the database, recording the ID values |
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// we insert to use when populating image_tag. |
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$tagsToIds = []; |
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foreach ($unique_keywords as $newTag) { |
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$insertTagStmt->bindValue('name', $newTag); |
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$insertTagStmt->executeStatement(); |
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$tagsToIds[$newTag] = $this->connection->lastInsertId(); |
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}; |
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// Now go through the images again, creating relationships to our newly- |
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// created tags from their existing keywords. |
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$insertImageTagStmt = $this->connection->prepare('INSERT INTO image_tag (image_id, tag_id) VALUES (:image_id, :tag_id)'); |
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foreach ($images as $image) { |
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// Uniquify, just in case we had two of the same tag on one image |
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$keywords = array_unique(unserialize($image['keywords'])); |
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foreach ($keywords as $keyword) { |
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$imageId = $image['id']; |
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$tagId = $tagsToIds[$keyword]; |
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$insertImageTagStmt->bindValue('image_id', $imageId); |
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$insertImageTagStmt->bindValue('tag_id', $tagId); |
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$insertImageTagStmt->executeStatement(); |
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} |
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} |
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} |
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} |
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gothick /
omm
