From 23431d0e9da3b43759956cbc33763534a4fd8ef1 Mon Sep 17 00:00:00 2001
From: Johannes Meyer <johannes.meyer@icinga.com>
Date: Wed, 12 Oct 2022 17:00:11 +0200
Subject: [PATCH] FilterProcessor: Inject column expressions directly into
 filters

fixes #75
---
 src/Compat/FilterProcessor.php | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/Compat/FilterProcessor.php b/src/Compat/FilterProcessor.php
index 0b091f1..2acc8f7 100644
--- a/src/Compat/FilterProcessor.php
+++ b/src/Compat/FilterProcessor.php
@@ -9,6 +9,7 @@
 use ipl\Orm\Relation;
 use ipl\Orm\UnionQuery;
 use ipl\Sql\Expression;
+use ipl\Sql\ExpressionInterface;
 use ipl\Sql\Filter\Exists;
 use ipl\Sql\Filter\NotExists;
 use ipl\Stdlib\Contract\Filterable;
@@ -128,6 +129,20 @@ protected function requireAndResolveFilterColumns(Filter\Rule $filter, Query $qu
                 throw new InvalidColumnException($columnName, $subject);
             }
 
+            $columns = $subject->getColumns();
+            if (isset($columns[$columnName]) && $columns[$columnName] instanceof ExpressionInterface) {
+                $expression = clone $columns[$columnName];
+                $expression->setColumns($resolver->qualifyColumns(
+                    $resolver->requireAndResolveColumns(
+                        $columns[$columnName]->getColumns(),
+                        $subject
+                    ),
+                    $subject
+                ));
+
+                $filter->setColumn($query->getDb()->getQueryBuilder()->buildExpression($expression));
+            }
+
             if ($relationPath !== $baseTable) {
                 $query->utilize($relationPath);
                 $this->madeJoins[$relationPath][] = $filter;