59 lines
1.9 KiB
MySQL
59 lines
1.9 KiB
MySQL
|
-- Your SQL goes here
|
||
|
|
create table sections (
|
||
|
|
id uuid DEFAULT gen_random_uuid() PRIMARY KEY,
|
||
|
|
|
||
|
|
-- Title of the section
|
||
|
|
title varchar(255) UNIQUE NOT NULL,
|
||
|
|
-- Name to use when routing (this just makes for prettier URLs)
|
||
|
|
shortname varchar(32) UNIQUE NOT NULL,
|
||
|
|
-- Optional description of the section
|
||
|
|
description text,
|
||
|
|
-- Wether to show the section in the default list on the homepage
|
||
|
|
is_default boolean NOT NULL DEFAULT false,
|
||
|
|
-- Wether the posts should contain titles or not
|
||
|
|
has_titles boolean NOT NULL DEFAULT true
|
||
|
|
);
|
||
|
|
|
||
|
|
create table posts (
|
||
|
|
id uuid DEFAULT gen_random_uuid() PRIMARY KEY,
|
||
|
|
|
||
|
|
section_id uuid NOT NULL REFERENCES sections(id) ON DELETE CASCADE,
|
||
|
|
-- Title of the post
|
||
|
|
-- Wether this is NULL or not is enforced using the enforce_post_titles trigger
|
||
|
|
title varchar(255),
|
||
|
|
-- Post date, defaults to today
|
||
|
|
publish_date date NOT NULL DEFAULT now(),
|
||
|
|
-- Content of the post
|
||
|
|
content text NOT NULL
|
||
|
|
);
|
||
|
|
|
||
|
|
create function enforce_post_titles() returns trigger as $enforce_post_titles$
|
||
|
|
begin
|
||
|
|
-- Check for a wrongfully null title
|
||
|
|
if new.title is null and exists (
|
||
|
|
select 1 from sections where id = new.section_id and has_titles
|
||
|
|
) then
|
||
|
|
raise exception 'Expected a post title, but got null.';
|
||
|
|
end if;
|
||
|
|
|
||
|
|
if new.title is not null and exists (
|
||
|
|
select 1 from sections where id = new.section_id and not has_titles
|
||
|
|
) then
|
||
|
|
raise exception 'Expected an empty post title, but got a value.';
|
||
|
|
end if;
|
||
|
|
|
||
|
|
return new;
|
||
|
|
end;
|
||
|
|
$enforce_post_titles$ language plpgsql;
|
||
|
|
|
||
|
|
create trigger insert_enforce_post_titles
|
||
|
|
before insert on posts
|
||
|
|
for each row
|
||
|
|
execute function enforce_post_titles();
|
||
|
|
|
||
|
|
create trigger update_enforce_post_titles
|
||
|
|
before update of title on posts
|
||
|
|
for each row
|
||
|
|
when (old.title is distinct from new.title)
|
||
|
|
execute function enforce_post_titles();
|