feature #3: create extra table like comments and votes

.idea/codeStyles/Project.xml

@@ -3,6 +3,12 @@
     <JetCodeStyleSettings>
       <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
     </JetCodeStyleSettings>
+    <PostgresCodeStyleSettings version="2">
+      <option name="ALIAS_CASE" value="1" />
+      <option name="KEYWORD_CASE" value="1" />
+      <option name="TYPE_CASE" value="1" />
+      <option name="IDENTIFIER_CASE" value="1" />
+    </PostgresCodeStyleSettings>
     <codeStyleSettings language="kotlin">
       <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
     </codeStyleSettings>

resources/sql/migrations/0000-init.down.sql

@@ -1,3 +1,21 @@
+-- Extra resources
+drop table if exists follow_article;
+drop table if exists follow_constitution;
+drop table if exists follow_citizen;
+drop table if exists follow;
+
+drop table if exists vote_for_article;
+drop table if exists vote_for_constitution;
+drop table if exists vote_for_comment_on_article;
+drop table if exists vote_for_comment_on_constitution;
+drop table if exists vote;
+
+drop table if exists comment_on_article;
+drop table if exists comment_on_constitution;
+drop table if exists comment;
+
+drop table if exists extra;
+
 -- Article & Contitution
 drop table if exists article_relations;
 drop trigger if exists set_constitution_link_trigger on article_on_title;

resources/sql/migrations/0000-init.up.sql

@@ -1,13 +1,18 @@
 -- Users
+create extension if not exists pgcrypto;
+-- select *
+-- from "user"
+-- where username = lower('nick@example.com')
+--   and password = crypt('12346', password);
 
 create table "user"
 (
     id         uuid        default uuid_generate_v4() not null primary key,
     created_at timestamptz default now()              not null,
-    updated_at timestamptz default now()              not null,
+    updated_at timestamptz default now()              not null check ( updated_at >= created_at ),
     blocked_at timestamptz default null               null,
-    username   varchar(64)                            not null,
+    username   varchar(64)                            not null check ( username != '' and lower(username) = username) unique,
-    password   varchar(258)                           not null
+    password   text                                   not null check ( password != '' )
 );
 
 create type "name" as (
@@ -18,21 +23,23 @@ create type "name" as (
 
 create table citizen
 (
-    id         uuid        default uuid_generate_v4() not null primary key,
+    id                uuid        default uuid_generate_v4() not null primary key,
-    created_at timestamptz default now()              not null,
+    created_at        timestamptz default now()              not null,
-    name       "name"                                 not null,
+    name              "name"                                 not null check ( name != '' ),
-    birthday   date                                   not null,
+    birthday          date                                   not null,
-    user_id    uuid                                   not null references "user" (id)
+    user_id           uuid                                   not null references "user" (id),
+    vote_annonymous   boolean     default true               not null,
+    follow_annonymous boolean     default true               not null
 );
 
 create table workgroup
 (
     id            uuid        default uuid_generate_v4() not null primary key,
     created_at    timestamptz default now()              not null,
-    updated_at    timestamptz default now()              not null,
+    updated_at    timestamptz default now()              not null check ( updated_at >= created_at ),
-    created_by_id uuid                                   not null references "user" (id),
+    created_by_id uuid                                   not null references citizen (id),
     name          varchar(128)                           not null,
-    description   text                                   not null,
+    description   text                                   null,
     annonymous    boolean     default false              not null,
     logo          text                                   null,
     owner_id      uuid                                   not null references citizen (id)
@@ -50,7 +57,7 @@ create table moderator
 (
     id              uuid        default uuid_generate_v4() not null primary key,
     created_at      timestamptz default now()              not null,
-    updated_at      timestamptz default now()              not null,
+    updated_at      timestamptz default now()              not null check ( updated_at >= created_at ),
     assigned_period tstzrange[] default '{}'               not null,
     user_id         uuid                                   not null references "user" (id)
 );
@@ -69,7 +76,7 @@ create or replace function set_version_number() returns trigger
     language plpgsql as
 $$
 begin
-    new.version_number = generate_version_number(TG_TABLE_NAME::regclass, new.version_id);
+    new.version_number = generate_version_number(tg_table_name::regclass, new.version_id);
 end;
 $$;
 
@@ -77,43 +84,43 @@ create table article
 (
     id             uuid          default uuid_generate_v4() not null primary key,
     created_at     timestamptz   default now()              not null,
-    created_by_id  uuid                                     not null references "user" (id),
+    created_by_id  uuid                                     not null references citizen (id),
     version_id     uuid          default uuid_generate_v4() not null,
-    version_number int                                      not null,
+    version_number int                                      not null unique,
     title          text                                     not null,
     annonymous     boolean       default false              not null,
-    content        text                                     not null,
+    content        text                                     not null check ( content != '' ),
     description    text,
     tags           varchar(32)[] default '{}'               not null
 );
 
-CREATE TRIGGER generate_version_number_trigger
+create trigger generate_version_number_trigger
-    BEFORE INSERT
+    before insert
-    ON article
+    on article
-EXECUTE PROCEDURE set_version_number();
+execute procedure set_version_number();
 
 create table constitution
 (
     id             uuid        default uuid_generate_v4() not null primary key,
     created_at     timestamptz default now()              not null,
-    created_by_id  uuid                                   not null references "user" (id),
+    created_by_id  uuid                                   not null references citizen (id),
     version_id     uuid        default uuid_generate_v4() not null,
     version_number int                                    not null,
     title          text                                   not null,
     annonymous     boolean     default false              not null
 );
 
-CREATE TRIGGER generate_version_number_trigger
+create trigger generate_version_number_trigger
-    BEFORE INSERT
+    before insert
-    ON constitution
+    on constitution
-EXECUTE PROCEDURE set_version_number();
+execute procedure set_version_number();
 
 create table title
 (
     id              uuid        default uuid_generate_v4() not null primary key,
     created_at      timestamptz default now()              not null,
-    created_by_id   uuid                                   not null references "user" (id),
+    created_by_id   uuid                                   not null references citizen (id),
-    name            text                                   not null,
+    name            text                                   not null check ( name != '' ),
     rank            int                                    not null,
     constitution_id uuid                                   not null references constitution (id)
 );
@@ -122,7 +129,7 @@ create table article_in_title
 (
     id              uuid        default uuid_generate_v4() not null primary key,
     created_at      timestamptz default now()              not null,
-    created_by_id   uuid                                   not null references "user" (id),
+    created_by_id   uuid                                   not null references citizen (id),
     rank            int                                    not null,
     title_id        uuid                                   not null references title (id),
     article_id      uuid                                   not null references article (id),
@@ -141,16 +148,119 @@ begin
 end;
 $$;
 
-CREATE TRIGGER set_constitution_link_trigger
+create trigger set_constitution_link_trigger
-    BEFORE INSERT
+    before insert
-    ON article_in_title
+    on article_in_title
-EXECUTE PROCEDURE set_constitution_link();
+execute procedure set_constitution_link();
 
 create table article_relations
 (
     source_id     uuid references article,
     target_id     uuid references article check ( source_id != target_id ),
     created_at    timestamptz default now(),
-    created_by_id uuid not null references "user" (id),
+    created_by_id uuid not null references citizen (id),
     primary key (source_id, target_id)
 );
+
+-- Extra resources
+
+create table extra
+(
+    id               uuid        default uuid_generate_v4() not null primary key,
+    created_at       timestamptz default now()              not null,
+    citizen_id       uuid                                   not null references citizen (id),
+    target_id        uuid                                   not null,
+    target_reference regclass                               not null
+);
+
+create table follow
+(
+    foreign key (citizen_id) references citizen (id),
+    primary key (id)
+) inherits (extra);
+
+create table follow_article
+(
+    foreign key (citizen_id) references citizen (id),
+    foreign key (target_id) references article (id),
+    primary key (id)
+) inherits (follow);
+
+create table follow_constitution
+(
+    foreign key (citizen_id) references citizen (id),
+    foreign key (target_id) references constitution (id),
+    primary key (id)
+) inherits (follow);
+
+create table follow_citizen
+(
+    foreign key (citizen_id) references citizen (id),
+    foreign key (target_id) references citizen (id),
+    primary key (id)
+) inherits (follow);
+
+
+
+create table comment
+(
+    updated_at timestamptz default now() not null check ( updated_at >= created_at ),
+    "content"  text                      not null check ( content != '' ),
+    parent_id  uuid                      null references comment (id),
+    foreign key (citizen_id) references citizen (id),
+    primary key (id)
+) inherits (extra);
+
+create table comment_on_article
+(
+    foreign key (citizen_id) references citizen (id),
+    foreign key (target_id) references article (id),
+    foreign key (parent_id) references comment_on_article (id),
+    primary key (id)
+) inherits (comment);
+
+create table comment_on_constitution
+(
+    foreign key (citizen_id) references citizen (id),
+    foreign key (target_id) references constitution (id),
+    foreign key (parent_id) references comment_on_constitution (id),
+    primary key (id)
+) inherits (comment);
+
+
+
+create table vote
+(
+    anonymous boolean default true not null,
+    note      int                  not null check ( note >= -1 and note <= 1 ),
+    foreign key (citizen_id) references citizen (id),
+    primary key (id)
+) inherits (extra);
+
+create table vote_for_article
+(
+    foreign key (target_id) references article (id),
+    foreign key (citizen_id) references citizen (id),
+    primary key (id)
+) inherits (vote);
+
+create table vote_for_constitution
+(
+    foreign key (target_id) references constitution (id),
+    foreign key (citizen_id) references citizen (id),
+    primary key (id)
+) inherits (vote);
+
+create table vote_for_comment_on_article
+(
+    foreign key (target_id) references comment_on_article (id),
+    foreign key (citizen_id) references citizen (id),
+    primary key (id)
+) inherits (vote);
+
+create table vote_for_comment_on_constitution
+(
+    primary key (id),
+    foreign key (target_id) references comment_on_constitution (id),
+    foreign key (target_id) references citizen (id)
+) inherits (vote);