60 lines
1.3 KiB
PHP
60 lines
1.3 KiB
PHP
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<?php
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namespace PicoDb;
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class Schema
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{
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protected $db = null;
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public function __construct(Database $db)
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{
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$this->db = $db;
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}
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public function check($last_version = 1)
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{
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$current_version = $this->db->getConnection()->getSchemaVersion();
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if ($current_version < $last_version) {
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return $this->migrateTo($current_version, $last_version);
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}
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return true;
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}
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public function migrateTo($current_version, $next_version)
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{
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try {
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$this->db->startTransaction();
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for ($i = $current_version + 1; $i <= $next_version; $i++) {
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$function_name = '\Schema\version_'.$i;
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if (function_exists($function_name)) {
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call_user_func($function_name, $this->db->getConnection());
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$this->db->getConnection()->setSchemaVersion($i);
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}
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else {
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throw new \LogicException('To execute a database migration, you need to create this function: "'.$function_name.'".');
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}
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}
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$this->db->closeTransaction();
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}
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catch (\PDOException $e) {
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$this->db->cancelTransaction();
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return false;
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}
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return true;
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}
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}
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