Gridfilter on relation fields

models/DataObject/ClassDefinition/Data/Extension/RelationFilterConditionParser.php

@@ -0,0 +1,47 @@
+<?php
+/**
+ * @category    pimcore
+ * @date        25/06/2021
+ * @author      Filip Szenborn <fszenborn@divante.co>
+ */
+declare(strict_types=1);
+
+namespace Pimcore\Model\DataObject\ClassDefinition\Data\Extension;
+
+/**
+ * Trait RelationFilterConditionParser
+ * @package Pimcore\Model\DataObject\ClassDefinition\Data\Extension
+ */
+trait RelationFilterConditionParser
+{
+    /**
+     * Parses filter value of a relation field and creates the filter condition
+     * @param $value
+     * @param $operator
+     * @param $name
+     * @return string
+     */
+    public function getRelationFilterCondition($value, $operator, $name)
+    {
+        if ($operator == '=') {
+            $value = "'%," . $value . ",%'";
+            return '`' . $name . '` LIKE ' . $value . ' ';
+        } elseif ($operator == 'LIKE') {
+            $result = $name . " IS NULL";
+            $values = explode(',', (string)$value ?? '');
+            if (is_array($values) && !empty($values)) {
+                $fieldConditions = [];
+                foreach ($values as $value) {
+                    if (empty($value)) {
+                        continue;
+                    }
+                    $fieldConditions[] = '`' . $name . "` LIKE '%" . $value . "%' ";
+                }
+                if (!empty($fieldConditions)) {
+                    $result = '(' . implode(' AND ', $fieldConditions) . ')';
+                }
+            }
+            return $result;
+        }
+    }
+}