public function loadColumn(Column $column)
{
if ($column->isSynced()) {
return $this;
}
$name = $this->quoteName($column->getDatabase(), $column->getTable());
$stmt = $this->query("SHOW COLUMNS IN {$name} WHERE `Field`=?", [$column->getName()]);
$info = $stmt->fetchObject();
$matches = [];
if (!preg_match('/^(?<type>[a-zA-Z]+)(?:\\((?<extra>[^\\)]+)\\))?$/i', $info->Type, $matches)) {
throw new Exception("Received unexpected type {$info->Type} from database, failed to parse it.");
}
$type = $this->mapColumnType(strtolower($matches['type']), true);
$extra = isset($matches['extra']) ? $matches['extra'] : null;
if ($extra) {
if (is_numeric($extra)) {
$maxLength = intval($extra);
if ($type === 'bool' && $maxLength > 1) {
$type = 'byte';
}
$column->setMaxLength($maxLength);
} else {
$column->setAllowedValues(array_map(function ($val) {
return trim($val, '"\'');
}, explode(',', $extra)));
}
}
$column->setType($type);
switch (strtolower($info->Null)) {
case 'no':
$column->makeRequired();
break;
default:
case 'yes':
$column->makeOptional();
break;
}
switch (strtolower($info->Key)) {
case 'pri':
$column->makePrimary();
break;
case 'uni':
$column->makeUnique();
break;
case 'mul':
$table = $column->getTable();
$fkName = "{$table}_{$column}_FK";
$stmt = $this->query('SELECT `REFERENCED_TABLE_SCHEMA` AS `db`, ' . '`REFERENCED_TABLE_NAME` AS `tbl`, ' . '`REFERENCED_COLUMN_NAME` AS `col` ' . 'FROM `information_schema`.`KEY_COLUMN_USAGE` ' . 'WHERE `CONSTRAINT_SCHEMA`=? AND `CONSTRAINT_NAME`=?', [$column->getDatabase()->getName(), $fkName]);
$refInfo = $stmt->fetchObject();
if ($refInfo) {
$refCol = $column->getSource()->getDatabase($refInfo->db)->getTable($refInfo->tbl)->getColumn($refInfo->col);
$column->reference($refCol);
} else {
$column->makeIndex();
}
break;
}
if (!empty($info->Default)) {
$column->setDefaultValue($info->Default);
}
if ($info->Extra == 'auto_increment') {
$column->autoIncrease();
}
return $this;
}
