protected function requireFilterColumns(Filter $filter)
{
if ($filter instanceof FilterExpression) {
if ($filter->getExpression() === '*') {
return;
// Wildcard only filters are ignored so stop early here to avoid joining a table for nothing
}
$alias = $filter->getColumn();
$this->requireColumn($alias);
if ($this->isCustomvar($alias)) {
$column = $this->getCustomvarColumnName($alias);
} else {
$column = $this->aliasToColumnName($alias);
}
if (isset($this->columnsWithoutCollation[$alias])) {
$expression = $filter->getExpression();
if (is_array($expression)) {
$filter->setExpression(array_map('strtolower', $expression));
} else {
$filter->setExpression(strtolower($expression));
}
}
$filter->setColumn($column);
} else {
foreach ($filter->filters() as $filter) {
$this->requireFilterColumns($filter);
}
}
}
/**
* Recurse the given filter and ensure that any string conversion is case-insensitive
*
* @param Filter $filter
*/
protected function lowerColumnsWithoutCollation(Filter $filter)
{
if ($filter instanceof FilterExpression) {
if (in_array($filter->getColumn(), $this->columnsWithoutCollation) && strpos($filter->getColumn(), 'LOWER') !== 0) {
$filter->setColumn('LOWER(' . $filter->getColumn() . ')');
$expression = $filter->getExpression();
if (is_array($expression)) {
$filter->setExpression(array_map('strtolower', $expression));
} else {
$filter->setExpression(strtolower($expression));
}
}
} else {
foreach ($filter->filters() as $chainedFilter) {
$this->lowerColumnsWithoutCollation($chainedFilter);
}
}
}
