Conditional function not working as intended postgresql - sql

Question

So I got this table on postgresql that people regularly update and the below function.
table
id integer
status integer
date date
on_hold boolean
What this function is supposed to do is to fill out the date column automatically whenever the status becomes 50 and also if it was null
Problem is that i do not want the date column to be filled when the on_hold boolean column is true.
I've tried setting up the function just by typing on_hold = true but then it somehow says it doesn't exist. When i use old. or new. it doesn't pass any error but it still updates the date.
How to get to the intended result which is to not update the date when on_hold is true
CREATE OR REPLACE FUNCTION table_update()
RETURNS trigger
LANGUAGE plpgsql
AS $function$
BEGIN
if new.status = 50
and new.date is null
and (new.on_hold = false or old.on_hold = false)
then new.date = now() + interval '90' day ;
end if;
RETURN NEW;
END;
$function$
;
~~~

Answer 1

Just change the condition to
and old.on_hold != true -- != true include false *AND NULL*
and maybe (if you do not want to change anything if status is 50 and becomes 50 again) add:
(new.status = 50 and old.status != 50)
Full function:
demo:db<>fiddle
CREATE OR REPLACE FUNCTION table_update()
RETURNS trigger
LANGUAGE plpgsql
AS $$
BEGIN
if (new.status = 50 and old.status != 50)
and new.the_date is null
and old.on_hold != true
then
new.the_date = now() + interval '90' day;
end if;
RETURN NEW;
END;
$$;