8000 Update is_match behaviour with empty string by SimoneT-DD · Pull Request #29309 · DataDog/documentation · GitHub
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Update is_match behaviour with empty string #29309

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Merged
merged 5 commits into from
May 19, 2025
Merged

Update is_match behaviour with empty string #29309

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b7ebe49
Update is_match behaviour with empty string
SimoneT-DD May 13, 2025
13dcfce
update is_exact_match
SimoneT-DD May 13, 2025
0a45da2
update fallback documentation
SimoneT-DD May 13, 2025
787746a
Apply suggestions from code review
SimoneT-DD May 14, 2025
ea50308
update is match section
SimoneT-DD May 14, 2025
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14 changes: 11 additions & 3 deletions content/en/monitors/notify/variables.md
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Expand Up @@ -141,8 +141,7 @@ Or use the `{{else}}` parameter in the first example:
@slack-example
{{/is_match}}
```

**Note**: To check if a `<TAG_VARIABLE>` is **NOT** empty, use an empty string for the `<COMPARISON_STRING>`.
**Note**: To check if a `<TAG_VARIABLE>` does not exist or if it's empty, use `is_exact_match`. See `is_exact_match` tab for more details.

{{% /tab %}}
{{% tab "is_exact_match" %}}
Expand Down Expand Up @@ -189,6 +188,14 @@ To notify your dev team if the value that breached the threshold of your monitor
{{/is_exact_match}}
```

The `is_exact_match` conditional variable also supports an empty string for the `<COMPARISON_STRING>` to check if the attribute or tag is empty or does not exist.
```text
{{#is_exact_match "host.datacenter" ""}}
This displays if the attribute or tag does not exist or if it's empty
{{/is_match}}
```


{{% /tab %}}
{{% tab "is_renotify" %}}

Expand Down Expand Up @@ -551,8 +558,9 @@ When building dynamic handles with attributes that might not always be present,
To avoid missed notifications when using dynamic handles with these variables, make sure to add a fallback handle:

```text
{{#is_match "kube_namespace.owner" ""}}
{{#is_exact_match "kube_namespace.owner" ""}}
@slack-example
// This will notify @slack-example if the kube_namespace.owner variable is empty or does not exist.
{{/is_match}}
```

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