From 4a8e90bd43205d33fdf02dc326e6b0dbed583525 Mon Sep 17 00:00:00 2001
From: Enrico Testori <hypertesto@gmail.com>
Date: Sun, 5 May 2019 20:11:02 +0200
Subject: [PATCH] db: decrease comment count when a comment is deleted

Update commentsDeleteTriggerFunction in order to decrease the
counter before deleting nested comments.

Closes https://gitlab.com/commento/commento/issues/157
---
 db/20190505191006-comment-count-decrease.sql | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 db/20190505191006-comment-count-decrease.sql

diff --git a/db/20190505191006-comment-count-decrease.sql b/db/20190505191006-comment-count-decrease.sql
new file mode 100644
index 0000000..46e963d
--- /dev/null
+++ b/db/20190505191006-comment-count-decrease.sql
@@ -0,0 +1,13 @@
+-- This trigger is called every time a comment is deleted, so the comment count for the page where the comment belong is updated
+CREATE OR REPLACE FUNCTION commentsDeleteTriggerFunction() RETURNS TRIGGER AS $trigger$
+BEGIN
+  UPDATE pages
+  SET commentCount = commentCount - 1
+  WHERE domain = old.domain AND path = old.path;
+
+  DELETE FROM comments
+  WHERE parentHex = old.commentHex;
+
+  RETURN NEW;
+END;
+$trigger$ LANGUAGE plpgsql;