@author Ross Riley
/**
* The default handler is the last to be run and handler simple value parsing.
*
* @param string $key
* @param string $value
* @param ExpressionBuilder $expr
*
* @return Filter
*/
public function defaultFilterHandler($key, $value, $expr)
{
$val = $this->parseValue($value);
$placeholder = $key . '_1';
$exprMethod = $val['operator'];
$filter = new Filter();
$filter->setKey($key);
$filter->setExpression($expr->andX($expr->{$exprMethod}($this->alias . $key, ":{$placeholder}")));
$filter->setParameters([$placeholder => $val['value']]);
return $filter;
}
/** This method does an in-place modification of a generic contenttype.field query to the format actually used
* in the raw sql category. For instance a simple query might say `entries.tags = 'movies'` but now we are in the
* context of entries the actual SQL fragment needs to be `tags.slug = 'movies'`. We don't know this until we
* drill down to the individual field types so this rewrites the SQL fragment just before the query gets sent.
*
* Note, reflection is used to achieve this, it is not ideal, but the CompositeExpression shipped with DBAL chooses
* to keep the query parts as private and only allow access to the final computed string.
*
* @param Filter $filter
* @param QueryInterface $query
* @param $field
* @param $column
*/
protected function rewriteQueryFilterParameters(Filter $filter, QueryInterface $query, $field, $column)
{
$originalExpression = $filter->getExpressionObject();
$reflected = new ReflectionProperty(CompositeExpression::class, 'parts');
$reflected->setAccessible(true);
$originalParts = $reflected->getValue($originalExpression);
foreach ($originalParts as &$part) {
$part = str_replace($query->getContenttype() . "." . $field, $field . "." . $column, $part);
}
$reflected->setValue($originalExpression, $originalParts);
$filter->setExpression($originalExpression);
}
