move deletion of debitorRel from JPA Cascade to SQL after delete trigger

src/main/java/net/hostsharing/hsadminng/hs/office/debitor/HsOfficeDebitorEntity.java

@@ -19,6 +19,10 @@ import jakarta.persistence.*;
 import java.io.IOException;
 import java.util.UUID;
 
+import static jakarta.persistence.CascadeType.DETACH;
+import static jakarta.persistence.CascadeType.MERGE;
+import static jakarta.persistence.CascadeType.PERSIST;
+import static jakarta.persistence.CascadeType.REFRESH;
 import static java.util.Optional.ofNullable;
 import static net.hostsharing.hsadminng.rbac.rbacdef.RbacView.Column.dependsOnColumn;
 import static net.hostsharing.hsadminng.rbac.rbacdef.RbacView.Nullable.NOT_NULL;
@@ -74,7 +78,7 @@ public class HsOfficeDebitorEntity implements HasUuid, Stringifyable {
     @Column(name = "debitornumbersuffix", columnDefinition = "numeric(2)")
     private Byte debitorNumberSuffix; // TODO maybe rather as a formatted String?
 
-    @ManyToOne(cascade = CascadeType.ALL)
+    @ManyToOne(cascade = { PERSIST, MERGE, REFRESH, DETACH }, optional = false)
     @JoinColumn(name = "debitorreluuid", nullable = false)
     private HsOfficeRelationEntity debitorRel;
 

src/main/resources/db/changelog/270-hs-office-debitor.sql

@@ -23,6 +23,39 @@ create table hs_office_debitor
 --//
 
 
+-- ============================================================================
+--changeset hs-office-debitor-DELETE-DEPENDENTS-TRIGGER:1 endDelimiter:--//
+-- ----------------------------------------------------------------------------
+
+/**
+    Trigger function to delete related rows of a debitor to delete.
+ */
+create or replace function deleteHsOfficeDependentsOnDebitorDelete()
+    returns trigger
+    language PLPGSQL
+as $$
+declare
+    counter integer;
+begin
+    DELETE FROM hs_office_relation r WHERE r.uuid = OLD.debitorRelUuid;
+    GET DIAGNOSTICS counter = ROW_COUNT;
+    if counter = 0 then
+        raise exception 'debitor relation % could not be deleted', OLD.debitorRelUuid;
+    end if;
+
+    RETURN OLD;
+end; $$;
+
+/**
+    Triggers deletion of related details of a debitor to delete.
+ */
+create trigger hs_office_debitor_delete_dependents_trigger
+    after delete
+    on hs_office_debitor
+    for each row
+execute procedure deleteHsOfficeDependentsOnDebitorDelete();
+
+
 -- ============================================================================
 --changeset hs-office-debitor-MAIN-TABLE-JOURNAL:1 endDelimiter:--//
 -- ----------------------------------------------------------------------------