Fixed always looking for empty string in stiege in submitPreorder()

application/Api/v1/PreorderApicontroller.php

@@ -422,7 +422,6 @@ class PreorderApicontroller extends mfBaseApicontroller {
     $address_search_fields = [
       'street' => 'strasse',
       'housenumber' => "hausnummer",
-      'stiege' => "hausnummer_stiege",
       'zip' => "plz"
     ];
     if($this->district_is_city) {
@@ -436,6 +435,12 @@ class PreorderApicontroller extends mfBaseApicontroller {
         $address_search[$field_name] = $this->db()->escape(trim($this->post['address']->$key));
       }
     }
+
+    if(property_exists($this->post['address'], "stiege") && trim($this->post['address']->stiege)) {
+        $address_search["hausnummer_stiege"] = $this->db()->escape(trim($this->post['address']->stiege));
+    } else {
+        $address_search["hausnummer_stiege"] = null;
+    }
     
     $zusatz = false;
     if($this->hausnummer_add_zusatz) {
@@ -511,6 +516,10 @@ class PreorderApicontroller extends mfBaseApicontroller {
       $where = "1=1 ";
       foreach($address_search as $field => $value) {
         if($field == "ortschaft" || $field == "gemeinde") continue;
+        if($field == "hausnummer_stiege" && !$value) {
+            $where .= " AND (`hausnummer_stiege` = '' OR hausnummer_stiege IS NULL)";
+            continue;
+        }
         $where .= " AND `$field` = '$value'";
       }