batch example

Signed-off-by: Sertac Ozercan <sozercan@gmail.com>
open-policy-agent · Nov 23, 2021 · b8250ae · b8250ae
1 parent 5667046
commit b8250ae
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/website/docs/externaldata.md b/website/docs/externaldata.md
@@ -92,7 +92,11 @@ External data adds a [custom OPA built-in function](https://www.openpolicyagent.
 - `Provider`: the name of the provider to query
 - `Keys`: the list of keys to send to the provider
 
+e.g.,
 ```rego
+  # build a list of keys containing images for batching
+  my-list := [img | img = input.review.object.spec.template.spec.containers[_].image]
+
   # send external data request
   response := external_data({"provider": "my-provider", "keys": my-list})
 ```