Fix: Fix handling of missing delta result fields

The delta icons for severity, QoD and hostname now handle missing values
for the delta result correctly.

src/web/pages/results/row.js

@@ -70,8 +70,8 @@ const Row = ({
  entity.overrides.filter(override => override.isActive()).length > 0;
  const hasTickets = entity.tickets.length > 0;
  const deltaSeverity = entity.delta?.result?.severity;
- const deltaHostname = entity.delta?.result?.host.hostname;
- const deltaQoD = entity.delta?.result?.qod.value;
+ const deltaHostname = entity.delta?.result?.host?.hostname;
+ const deltaQoD = entity.delta?.result?.qod?.value;
  return (
  <TableRow>
  {delta && (
@@ -105,20 +105,19 @@ const Row = ({
  <TableData>
  <IconDivider>
  <SeverityBar severity={entity.severity} />
- {isDefined(entity.delta?.result) &&
- entity.severity !== deltaSeverity && (
- <DeltaDifferenceIcon
- title={_('Severity is changed from {{deltaSeverity}}.', {
- deltaSeverity,
- })}
- />
- )}
+ {isDefined(deltaSeverity) && entity.severity !== deltaSeverity && (
+ <DeltaDifferenceIcon
+ title={_('Severity is changed from {{deltaSeverity}}.', {
+ deltaSeverity,
+ })}
+ />
+ )}
  </IconDivider>
  </TableData>
  <TableData align="end">
  <IconDivider>
  <Qod value={entity.qod.value} />
- {isDefined(entity.delta?.result) && entity.qod.value !== deltaQoD && (
+ {isDefined(deltaQoD) && entity.qod.value !== deltaQoD && (
  <DeltaDifferenceIcon
  title={_('QoD is changed from {{deltaQoD}}.', {deltaQoD})}
  />
@@ -141,7 +140,7 @@ const Row = ({
  {host.hostname.length > 0 && (
  <span title={host.hostname}>{shorten(host.hostname, 40)}</span>
  )}
- {isDefined(entity.delta?.result) &&
+ {isDefined(deltaHostname) &&
  deltaHostname.length > 0 &&
  host.hostname !== deltaHostname && (
  <DeltaDifferenceIcon