Drupal 7 sort search results by relevancy - search

Question

In my module I have this implementation where I have a hook_search_execute() function which can be used for rewriting/extending default Drupal search. This function calls for executeFirstPass() method and adds to the query the following $first->addExpression('SUM(i.score * t.count)', 'calculated_score');
When I'm trying to add my sorting as following $query->orderBy('calculated_score', 'ASC');, I have an error.
However if I add $query->orderBy('n.title', 'ASC'); or $query->orderBy('n.created', 'ASC'); everything is fine and is sorting as it should be.
Does anyone have any ideas why this is happens?

Answer 1

After all my research I came only to this crappy solution.
In modules/search/search.extender.inc file we have the following code in line 437 (depends on Drupal version).
....
// Convert scores to an expression.
$this->addExpression('SUM(' . implode(' + ', $this->scores) . ')', 'calculated_score', $this->scoresArguments);
if (count($this->getOrderBy()) == 0) {
// Add default order after adding the expression.
$this->orderBy('calculated_score', 'DESC');
}
....
I turned this code into:
....
// Convert scores to an expression.
$this->addExpression('SUM(' . implode(' + ', $this->scores) . ')', 'calculated_score', $this->scoresArguments);
if (count($this->getOrderBy()) == 0) {
if ($_GET['orderby'] == 'relevance' && $_GET['orderdir'] == 'ASC') {
$dir = 'ASC';
}
else {
$dir = 'DESC';
}
// Add default order after adding the expression.
$this->orderBy('calculated_score', $dir);
}
....
Please feel free to propose clean solution.