LP1910546 Prevent Copy Location Delete With Active Copies

Raise a database exception when any attempt is made to marke a copy
location as deleted when the location contains non-deleted copies.

To Test:

1. Navigate to /eg2/staff/admin/local/asset/copy_location

2. Attempt to delete a copy location that is known to contain
   non-deleted copies.

3. Confirm an error message is displayed and the location is not marked
   as deleted.

Signed-off-by: Bill Erickson <berickxx@gmail.com>
Signed-off-by: Tiffany Little <tlittle@georgialibraries.org>
Signed-off-by: Michele Morgan <mmorgan@noblenet.org>

diff --git a/Open-ILS/src/sql/Pg/800.fkeys.sql b/Open-ILS/src/sql/Pg/800.fkeys.sql
index 78045d2..0fe4598 100644 (file)
--- a/Open-ILS/src/sql/Pg/800.fkeys.sql
+++ b/Open-ILS/src/sql/Pg/800.fkeys.sql
@@ -28,8 +28,25 @@ CREATE RULE protect_bib_rec_delete AS
 
 CREATE RULE protect_bre_id_neg1 AS ON UPDATE TO biblio.record_entry WHERE OLD.id = -1 DO INSTEAD NOTHING;
 
+
+-- Kill any transaction that tries to mark a copy location as 
+-- deleted if the location contains any non-deleted copies.
+CREATE OR REPLACE FUNCTION asset.check_delete_copy_location(acpl_id INTEGER) 
+    RETURNS VOID AS $FUNK$
+BEGIN
+    PERFORM TRUE FROM asset.copy WHERE location = acpl_id AND NOT deleted LIMIT 1;
+
+    IF FOUND THEN
+        RAISE EXCEPTION
+            'Copy location % contains active copies and cannot be deleted', acpl_id;
+    END IF;
+END;
+$FUNK$ LANGUAGE plpgsql;
+
+
 CREATE RULE protect_copy_location_delete AS
     ON DELETE TO asset.copy_location DO INSTEAD (
+        SELECT asset.check_delete_copy_location(OLD.id); -- exception on error
         UPDATE asset.copy_location SET deleted = TRUE WHERE OLD.id = asset.copy_location.id;
         UPDATE acq.lineitem_detail SET location = NULL WHERE location = OLD.id;
         DELETE FROM asset.copy_location_order WHERE location = OLD.id;

diff --git a/Open-ILS/src/sql/Pg/upgrade/XXXX.schema.reject-active-acpl-delete.sql b/Open-ILS/src/sql/Pg/upgrade/XXXX.schema.reject-active-acpl-delete.sql
new file mode 100644 (file)
index 0000000..b767ba8
--- /dev/null
+++ b/Open-ILS/src/sql/Pg/upgrade/XXXX.schema.reject-active-acpl-delete.sql
@@ -0,0 +1,30 @@
+BEGIN;
+
+-- SELECT evergreen.upgrade_deps_block_check('TODO', :eg_version);
+
+CREATE OR REPLACE FUNCTION asset.check_delete_copy_location(acpl_id INTEGER)
+    RETURNS VOID AS $FUNK$
+BEGIN
+    PERFORM TRUE FROM asset.copy WHERE location = acpl_id AND NOT deleted LIMIT 1;
+
+    IF FOUND THEN
+        RAISE EXCEPTION
+            'Copy location % contains active copies and cannot be deleted', acpl_id;
+    END IF;
+END;
+$FUNK$ LANGUAGE plpgsql;
+
+DROP RULE protect_copy_location_delete ON asset.copy_location;
+
+CREATE RULE protect_copy_location_delete AS
+    ON DELETE TO asset.copy_location DO INSTEAD (
+        SELECT asset.check_delete_copy_location(OLD.id);
+        UPDATE asset.copy_location SET deleted = TRUE WHERE OLD.id = asset.copy_location.id;
+        UPDATE acq.lineitem_detail SET location = NULL WHERE location = OLD.id;
+        DELETE FROM asset.copy_location_order WHERE location = OLD.id;
+        DELETE FROM asset.copy_location_group_map WHERE location = OLD.id;
+        DELETE FROM config.circ_limit_set_copy_loc_map WHERE copy_loc = OLD.id;
+    );
+
+COMMIT;
+