Add special group zero to gravity database.

Signed-off-by: DL6ER <dl6er@dl6er.de>

advanced/Scripts/database_migration/gravity/6_to_7.sql

@@ -0,0 +1,29 @@
+.timeout 30000
+
+PRAGMA FOREIGN_KEYS=OFF;
+
+BEGIN TRANSACTION;
+
+INSERT OR REPLACE INTO "group" (id,enabled,name) VALUES (0,1,'Unassociated');
+
+INSERT INTO adlist_by_group (adlist_id, group_id) SELECT id, 0 FROM adlist;
+INSERT INTO domainlist_by_group (domainlist_id, group_id) SELECT id, 0 FROM domainlist;
+
+CREATE TRIGGER tr_domainlist_add AFTER INSERT ON domainlist
+    BEGIN
+      INSERT INTO domainlist_by_group (domainlist_id, group_id) VALUES (NEW.id, 0);
+    END;
+
+CREATE TRIGGER tr_adlist_add AFTER INSERT ON adlist
+    BEGIN
+      INSERT INTO adlist_by_group (adlist_id, group_id) VALUES (NEW.id, 0);
+    END;
+
+CREATE TRIGGER tr_group_zero AFTER DELETE ON "group"
+    BEGIN
+      INSERT OR REPLACE INTO "group" (id,enabled,name) VALUES (0,1,'Unassociated');
+    END;
+
+UPDATE info SET value = 7 WHERE property = 'version';
+
+COMMIT;