/**
* Get the MySQL-specific representation of a value for a column
* @param Column $column
* @param mixed $value
* @return mixed
*/
public function getColumnDenormalizedValue(Column $column, $value)
{
if ($value === null) {
return null;
} else {
switch ($column->getType()) {
case 'date':
return date('Ymd', $value);
break;
case 'datetime':
return date('Y-m-d\\TH:i:s', $value);
break;
default:
return $value;
break;
}
}
}
/**
* Get a Table object for the given name
* TODO table/column properties should not be public
* @param Database $database
* @param string $name
* @throws \Exception
* @return Table
*/
public function buildTable(Database $database, $name)
{
$createTableInfo = $this->fetchAll("SHOW CREATE TABLE `{$database->getPrefix()}{$name}`");
if (!isset($createTableInfo[0]['Create Table'])) {
throw new \Exception('Could not find table ' . $name);
}
$createTableSql = $createTableInfo[0]['Create Table'];
$columns = [];
$primaryKeys = [];
$constraints = [];
$lowerToRealCaseTableNames = [];
$actualTableNames = [];
foreach ($this->getTables($database) as $tableName) {
$actualTableNames[$tableName] = true;
$lowerToRealCaseTableNames[strtolower($tableName)] = $tableName;
}
// parse columns
if (preg_match_all(self::CREATE_TABLE_SQL_COLUMNS_REGEX, $createTableSql, $columns, PREG_SET_ORDER)) {
$tableClass = $database->getClassMapper()->getClassForTable($name);
/** @var Table $table */
$table = new $tableClass($name, $database);
foreach ($columns as $ordinal => $columnInfo) {
$column = new Column($table);
$default = null;
if (isset($columnInfo['default']) && $columnInfo['default'] !== 'NULL') {
if ($columnInfo['default'] === '') {
$default = '';
} else {
if ($columnInfo['default'] !== 'CURRENT_TIMESTAMP' && $columnInfo['default'] !== 'CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP') {
// we need to parse the SQL default value
$defaultResult = $this->fetchAll('SELECT ' . $columnInfo['default']);
$default = current(current($defaultResult));
}
}
}
$column->setName($columnInfo['name'])->setOrdinal($ordinal)->setType(strtolower($columnInfo['type']))->setDefault($default)->setAllowNull(!isset($columnInfo['allowNull']) || $columnInfo['allowNull'] === 'NULL')->setAutoIncrement(!empty($columnInfo['autoIncrement']));
if ($column->getType() == 'set' || $column->getType() == 'enum') {
// we need to parse the SQL options
$optionsResult = $this->fetchAll('SELECT ' . $columnInfo['length']);
$options = [];
$i = 0;
foreach (current($optionsResult) as $option) {
$options[$column->getType() == 'set' ? pow(2, $i) : $i] = $option;
$i++;
}
$column->setOptions($options);
} else {
$column->setLength(isset($columnInfo['length']) && $columnInfo['length'] !== '' ? $columnInfo['length'] : null);
}
$table->columns[$column->getName()] = $column;
}
// parse primary keys
preg_match(self::CREATE_TABLE_SQL_PRIMARY_KEY_REGEX, $createTableSql, $primaryKeys);
$primaryKeys = explode('`,`', trim($primaryKeys[1], '`'));
foreach ($primaryKeys as $primaryKey) {
$table->primaryKeys[] = $primaryKey;
$table->columns[$primaryKey]->setPrimaryKey(true);
}
// parse relationships
preg_match_all(self::CREATE_TABLE_SQL_CONSTRAINT_REGEX, $createTableSql, $constraints, PREG_SET_ORDER);
$offset = strlen($database->getPrefix());
foreach ($constraints as $constraint) {
$localColumns = explode('`, `', trim($constraint['localColumns'], '`'));
$relatedColumns = explode('`, `', trim($constraint['relatedColumns'], '`'));
foreach ($localColumns as $localColumn) {
if (!isset($table->foreignKeys[$localColumn])) {
// columns can have multiple foreign keys; we can only use one of them
$table->foreignKeys[$localColumn] = $constraint['name'];
}
}
$foreignTableName = substr($constraint['relatedTable'], $offset);
// workaround for http://bugs.mysql.com/bug.php?id=6555
// map lower case table names to actual case table names
if (!isset($actualTableNames[$foreignTableName]) && isset($lowerToRealCaseTableNames[$foreignTableName])) {
$foreignTableName = $lowerToRealCaseTableNames[$foreignTableName];
}
if (!isset($table->relatedTables[$foreignTableName])) {
// tables can be related to another table multiple times; we can only use one of them
$table->relatedTables[$foreignTableName] = $constraint['name'];
}
$table->constraints[$constraint['name']] = ['localColumns' => $localColumns, 'relatedTable' => $foreignTableName, 'relatedColumns' => $relatedColumns];
}
return $table;
} else {
throw new \Exception('Could not parse table definition');
}
}
