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Posted to commits@isis.apache.org by da...@apache.org on 2021/10/05 12:43:12 UTC
[isis] branch ISIS-2873-petclinic updated: ISIS-2783: ex 4.9
optional
This is an automated email from the ASF dual-hosted git repository.
danhaywood pushed a commit to branch ISIS-2873-petclinic
in repository https://gitbox.apache.org/repos/asf/isis.git
The following commit(s) were added to refs/heads/ISIS-2873-petclinic by this push:
new 43bb95d ISIS-2783: ex 4.9 optional
43bb95d is described below
commit 43bb95da535b788186ee05e0cab569b82f51db88
Author: Dan Haywood <da...@haywood-associates.co.uk>
AuthorDate: Tue Oct 5 13:43:03 2021 +0100
ISIS-2783: ex 4.9 optional
---
.../modules/petclinic/pages/040-pet-entity.adoc | 37 +++++++++++++++++++++-
1 file changed, 36 insertions(+), 1 deletion(-)
diff --git a/antora/components/tutorials/modules/petclinic/pages/040-pet-entity.adoc b/antora/components/tutorials/modules/petclinic/pages/040-pet-entity.adoc
index e00ced4..13599de 100644
--- a/antora/components/tutorials/modules/petclinic/pages/040-pet-entity.adoc
+++ b/antora/components/tutorials/modules/petclinic/pages/040-pet-entity.adoc
@@ -896,7 +896,42 @@ public String default0Act() {
=== Optional exercise
-TODO: use @Action(choicesFrom="pets")
+If we wanted to work with multiple instances of the `pets` collection, we can use the xref:refguide:applib-methods:prefixes.adoc#choices[choices] method using the xref:refguide:applib:index/annotation/Action.adoc#choicesFrom[@Action#choicesFrom] attribute.
+
+Add this mixin to allow multiple ``Pet``s to be removed at the same time:
+
+[source,java]
+.PetOwner_removePets.java
+----
+@Action(
+ semantics = SemanticsOf.IDEMPOTENT,
+ commandPublishing = Publishing.ENABLED,
+ executionPublishing = Publishing.ENABLED,
+ choicesFrom = "pets" // <.>
+)
+@ActionLayout(associateWith = "pets", sequence = "2")
+@RequiredArgsConstructor
+public class PetOwner_removePets { // <.>
+
+ private final PetOwner petOwner;
+
+ public PetOwner act(final List<Pet> pets) { // <.>
+ pets.forEach(repositoryService::remove);
+ return petOwner;
+ }
+ public String disableAct() {
+ return petRepository.findByPetOwner(petOwner).isEmpty() ? "No pets" : null;
+ }
+ // <.>
+ @Inject PetRepository petRepository;
+ @Inject RepositoryService repositoryService;
+}
+----
+<.> Results in checkboxes in the table, allowing the user to optionally check one or more instances before invoking the action.
+<.> Renamed as the action now works with a list of ``Pet``s
+<.> Signature changed.
+<.> The `choices` method is removed.
+