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<?php |
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namespace carono\yii2migrate\helpers; |
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use yii\db\Connection; |
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use yii\helpers\ArrayHelper; |
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use yii\helpers\StringHelper; |
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class SchemaHelper |
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{ |
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/** |
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* @param Connection $db |
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* @param $table |
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* @return \yii\db\IndexConstraint[] |
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*/ |
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public static function findNonUniqueIndexes($db, $table) |
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{ |
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$indexes = self::findIndexes($db, $table); |
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$indexes = array_filter($indexes, function ($index) { |
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return !$index->isUnique; |
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}); |
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return ArrayHelper::index($indexes, 'name'); |
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} |
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/** |
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* @param Connection $db |
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* @param $table |
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* @return \yii\db\IndexConstraint[] |
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*/ |
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public static function findUniqueIndexes($db, $table) |
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{ |
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$indexes = self::findIndexes($db, $table); |
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$indexes = array_filter($indexes, function ($index) { |
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return $index->isUnique; |
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}); |
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return ArrayHelper::index($indexes, 'name'); |
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} |
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/** |
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* @param Connection $db |
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* @param $table |
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* @return \yii\db\IndexConstraint[] |
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*/ |
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public static function findIndexes($db, $table) |
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{ |
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$reflectionMethod = new \ReflectionMethod(get_class($db->schema), 'loadTableIndexes'); |
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$reflectionMethod->setAccessible(true); |
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$indexes = $reflectionMethod->invoke($db->schema, self::expandTablePrefix($table, $db->tablePrefix)); |
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return ArrayHelper::index($indexes, 'name'); |
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} |
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/** |
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* @param Connection $db |
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* @param $table |
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* @return \yii\db\ForeignKeyConstraint[] |
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*/ |
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public static function findTableForeignKeys($db, $table) |
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{ |
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$reflectionMethod = new \ReflectionMethod(get_class($db->schema), 'loadTableForeignKeys'); |
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$reflectionMethod->setAccessible(true); |
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return ArrayHelper::index($reflectionMethod->invoke($db->schema, self::expandTablePrefix($table, $db->tablePrefix)), 'name'); |
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} |
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/** |
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* @param $str |
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* @return mixed |
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*/ |
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public static function removeSchema($str) |
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{ |
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if (strpos($str, '.') !== false) { |
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$arr = explode('.', $str); |
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return $arr[1]; |
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} |
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return $str; |
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} |
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/** |
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* {{%table}} to pfx_table |
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* |
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* @param $name |
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* @param $prefix |
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* @return null|string|string[] |
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*/ |
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public static function expandTablePrefix($name, $prefix) |
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{ |
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return preg_replace('/{{%([\w\-_]+)}}/', addcslashes($prefix, "\\") . '$1', $name); |
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} |
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/** |
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* pfx_table to {{%table}} |
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* |
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* @param $name |
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* @param $prefix |
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* @return null|string|string[] |
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*/ |
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public static function collapseTablePrefix($name, $prefix) |
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{ |
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$prefix = addcslashes($prefix, "\\/"); |
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return preg_replace("/^$prefix(.+)$/m", '{{%$1}}', $name); |
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} |
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/** |
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* Принудительно обрезаем названия ключей, если они получаются больше чем $length, т.к. базы могут вылететь с ошибкой |
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* |
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* @see https://dev.mysql.com/doc/refman/5.7/en/identifiers.html |
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* |
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* @param $name |
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* @param int $length |
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* @param null $suffix |
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* @return string |
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*/ |
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public static function truncateIndexName($name, $length = 64, $suffix = null) |
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{ |
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if (strlen($name) > $length) { |
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if (StringHelper::endsWith($name, $suffix)) { |
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$name = substr($name, 0, strlen($suffix) * -1); |
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} |
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return dechex(crc32($name)) . $suffix; |
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} |
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return $name; |
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} |
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} |
carono /
yii2-migrate
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