fix(clapi) link host with default poller if unknown poller (#6099)

lib/Centreon/Object/Instance/Instance.php

@@ -45,4 +45,16 @@ class Centreon_Object_Instance extends Centreon_Object
     protected $table = "nagios_server";
     protected $primaryKey = "id";
     protected $uniqueLabelField = "name";
+
+    public function getDefaultInstance()
+    {
+        $res = $this->db->query("SELECT `name` FROM `nagios_server` WHERE `is_default` = 1");
+        if( $res->rowCount() == 0) {
+            $res = $this->db->query("SELECT `name` FROM `nagios_server` WHERE `localhost` = '1'");
+        }
+
+        $row = $res->fetch();
+        return $row['name'];
+    }
+
 }

www/class/centreon-clapi/centreonHost.class.php

@@ -257,7 +257,14 @@ class CentreonHost extends CentreonObject
             if ($instanceName) {
                 $tmp = $instanceObject->getIdByParameter($instanceObject->getUniqueLabelField(), $instanceName);
                 if (!count($tmp)) {
-                    throw new CentreonClapiException(self::OBJECT_NOT_FOUND . ":" . $instanceName);
+                    $defaultInstanceName = $instanceObject->getDefaultInstance();
+                    $tmp = $instanceObject->getIdByParameter(
+                        $instanceObject->getUniqueLabelField(),
+                        $defaultInstanceName
+                    );
+                    if (!count($tmp)) {
+                        throw new CentreonClapiException(self::OBJECT_NOT_FOUND . " :" . $instanceName);
+                    }
                 }
                 $instanceId = $tmp[0];
             } else {