From 7ad5c50aeecc55e40eff76a716a30a7a9ccc3237 Mon Sep 17 00:00:00 2001
From: Johannes Meyer <johannes.meyer@icinga.com>
Date: Mon, 27 Apr 2026 19:04:17 +0200
Subject: [PATCH] Host|Service: Use `LEFT JOIN` for optional relations

fixes #1354
---
 library/Icingadb/Model/Host.php    | 9 ++++++---
 library/Icingadb/Model/Service.php | 9 ++++++---
 2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/library/Icingadb/Model/Host.php b/library/Icingadb/Model/Host.php
index 22684aed..f680bbfe 100644
--- a/library/Icingadb/Model/Host.php
+++ b/library/Icingadb/Model/Host.php
@@ -257,17 +257,20 @@ class Host extends Model
         $relations->hasOne('unreachable_parent', UnreachableParent::class)->setJoinType('LEFT');
 
         $relations->belongsTo('environment', Environment::class);
-        $relations->belongsTo('eventcommand', Eventcommand::class);
+        $relations->belongsTo('eventcommand', Eventcommand::class)
+            ->setJoinType('LEFT');
         $relations->belongsTo('checkcommand', Checkcommand::class);
         $relations->belongsTo('timeperiod', Timeperiod::class)
             ->setCandidateKey('check_timeperiod_id')
             ->setJoinType('LEFT');
         $relations->belongsTo('action_url', ActionUrl::class)
             ->setCandidateKey('action_url_id')
-            ->setForeignKey('id');
+            ->setForeignKey('id')
+            ->setJoinType('LEFT');
         $relations->belongsTo('notes_url', NotesUrl::class)
             ->setCandidateKey('notes_url_id')
-            ->setForeignKey('id');
+            ->setForeignKey('id')
+            ->setJoinType('LEFT');
         $relations->belongsTo('icon_image', IconImage::class)
             ->setCandidateKey('icon_image_id')
             ->setJoinType('LEFT');
diff --git a/library/Icingadb/Model/Service.php b/library/Icingadb/Model/Service.php
index 42cbb8a3..87818161 100644
--- a/library/Icingadb/Model/Service.php
+++ b/library/Icingadb/Model/Service.php
@@ -254,13 +254,16 @@ class Service extends Model
         $relations->belongsTo('timeperiod', Timeperiod::class)
             ->setCandidateKey('check_timeperiod_id')
             ->setJoinType('LEFT');
-        $relations->belongsTo('eventcommand', Eventcommand::class);
+        $relations->belongsTo('eventcommand', Eventcommand::class)
+            ->setJoinType('LEFT');
         $relations->belongsTo('action_url', ActionUrl::class)
             ->setCandidateKey('action_url_id')
-            ->setForeignKey('id');
+            ->setForeignKey('id')
+            ->setJoinType('LEFT');
         $relations->belongsTo('notes_url', NotesUrl::class)
             ->setCandidateKey('notes_url_id')
-            ->setForeignKey('id');
+            ->setForeignKey('id')
+            ->setJoinType('LEFT');
         $relations->belongsTo('icon_image', IconImage::class)
             ->setCandidateKey('icon_image_id')
             ->setJoinType('LEFT');