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CREATE FUNCTION _api.like_update()
RETURNS TRIGGER
LANGUAGE plpgsql VOLATILE
AS $BODY$
DECLARE
_user_id INTEGER;
_changed BOOLEAN;
BEGIN
_user_id = _api.get_user_id();
_changed = FALSE;
IF OLD.user_id <> _user_id THEN
PERFORM _api.raise_deny();
END IF;
NEW.value = COALESCE(NEW.value, OLD.value);
IF NEW.value IS DISTINCT FROM OLD.value THEN
_changed = TRUE;
END IF;
IF _changed THEN
UPDATE admin.like SET
value = NEW.value,
modified = clock_timestamp()
WHERE id = OLD.id;
END IF;
RETURN NEW;
END
$BODY$;
GRANT EXECUTE ON FUNCTION _api.like_update()
TO rest_user;
GRANT UPDATE ON TABLE api.like
TO rest_user;
GRANT UPDATE ON TABLE admin.like
TO rest_user;
CREATE TRIGGER api_like_update_trgr
INSTEAD OF UPDATE
ON api.like
FOR EACH ROW
EXECUTE PROCEDURE _api.like_update();
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