wip db migration

crates/db_schema/src/impls/person.rs

@@ -276,8 +276,7 @@ mod tests {
       private_key: None,
       public_key: "pubkey".to_owned(),
       last_refreshed_at: inserted_person.published,
-      inbox_url: inserted_person.inbox_url.clone(),
-      shared_inbox_url: None,
+      inbox_id: 0,
       matrix_user_id: None,
       ban_expires: None,
       instance_id: inserted_instance.id,

crates/db_schema/src/schema.rs

@@ -321,6 +321,14 @@ diesel::table! {
     }
 }
 
+diesel::table! {
+    inbox (id) {
+        id -> Int4,
+        #[max_length = 255]
+        url -> Varchar,
+    }
+}
+
 diesel::table! {
     instance (id) {
         id -> Int4,
@@ -678,14 +686,11 @@ diesel::table! {
         last_refreshed_at -> Timestamptz,
         banner -> Nullable<Text>,
         deleted -> Bool,
-        #[max_length = 255]
-        inbox_url -> Varchar,
-        #[max_length = 255]
-        shared_inbox_url -> Nullable<Varchar>,
         matrix_user_id -> Nullable<Text>,
         bot_account -> Bool,
         ban_expires -> Nullable<Timestamptz>,
         instance_id -> Int4,
+        inbox_id -> Int4,
     }
 }
 
@@ -770,7 +775,7 @@ diesel::table! {
         featured_local -> Bool,
         url_content_type -> Nullable<Text>,
         alt_text -> Nullable<Text>,
-        scheduled_publish_time -> Nullable<Timestamptz>
+        scheduled_publish_time -> Nullable<Timestamptz>,
     }
 }
 
@@ -1043,6 +1048,7 @@ diesel::joinable!(mod_transfer_community -> community (community_id));
 diesel::joinable!(oauth_account -> local_user (local_user_id));
 diesel::joinable!(oauth_account -> oauth_provider (oauth_provider_id));
 diesel::joinable!(password_reset_request -> local_user (local_user_id));
+diesel::joinable!(person -> inbox (inbox_id));
 diesel::joinable!(person -> instance (instance_id));
 diesel::joinable!(person_aggregates -> person (person_id));
 diesel::joinable!(person_ban -> person (person_id));
@@ -1100,6 +1106,7 @@ diesel::allow_tables_to_appear_in_same_query!(
     federation_blocklist,
     federation_queue_state,
     image_details,
+    inbox,
     instance,
     instance_block,
     language,

crates/db_schema/src/source/person.rs

@@ -3,7 +3,6 @@ use crate::schema::{person, person_follower};
 use crate::{
   newtypes::{DbUrl, InstanceId, PersonId},
   sensitive::SensitiveString,
-  source::placeholder_apub_url,
 };
 use chrono::{DateTime, Utc};
 use serde::{Deserialize, Serialize};
@@ -45,11 +44,6 @@ pub struct Person {
   pub banner: Option<DbUrl>,
   /// Whether the person is deleted.
   pub deleted: bool,
-  #[cfg_attr(feature = "full", ts(skip))]
-  #[serde(skip, default = "placeholder_apub_url")]
-  pub inbox_url: DbUrl,
-  #[serde(skip)]
-  pub shared_inbox_url: Option<DbUrl>,
   /// A matrix id, usually given an @person:matrix.org
   pub matrix_user_id: Option<String>,
   /// Whether the person is a bot account.
@@ -57,6 +51,9 @@ pub struct Person {
   /// When their ban, if it exists, expires, if at all.
   pub ban_expires: Option<DateTime<Utc>>,
   pub instance_id: InstanceId,
+  #[cfg_attr(feature = "full", ts(skip))]
+  #[serde(skip, default)]
+  pub inbox_id: i32,
 }
 
 #[derive(Clone, derive_new::new)]
@@ -91,9 +88,7 @@ pub struct PersonInsertForm {
   #[new(default)]
   pub deleted: Option<bool>,
   #[new(default)]
-  pub inbox_url: Option<DbUrl>,
-  #[new(default)]
-  pub shared_inbox_url: Option<DbUrl>,
+  pub inbox_id: Option<i32>,
   #[new(default)]
   pub matrix_user_id: Option<String>,
   #[new(default)]
@@ -118,8 +113,7 @@ pub struct PersonUpdateForm {
   pub last_refreshed_at: Option<DateTime<Utc>>,
   pub banner: Option<Option<DbUrl>>,
   pub deleted: Option<bool>,
-  pub inbox_url: Option<DbUrl>,
-  pub shared_inbox_url: Option<Option<DbUrl>>,
+  pub inbox_id: Option<i32>,
   pub matrix_user_id: Option<Option<String>>,
   pub bot_account: Option<bool>,
   pub ban_expires: Option<Option<DateTime<Utc>>>,

crates/db_views_actor/src/community_follower_view.rs

@@ -4,13 +4,14 @@ use diesel::{
   dsl::{count_star, not},
   result::Error,
   ExpressionMethods,
+  JoinOnDsl,
   QueryDsl,
 };
 use diesel_async::RunQueryDsl;
 use lemmy_db_schema::{
   newtypes::{CommunityId, DbUrl, InstanceId, PersonId},
-  schema::{community, community_follower, person},
-  utils::{functions::coalesce, get_conn, DbPool},
+  schema::{community, community_follower, inbox, person},
+  utils::{get_conn, DbPool},
 };
 
 impl CommunityFollowerView {
@@ -32,15 +33,13 @@ impl CommunityFollowerView {
     community_follower::table
       .inner_join(community::table)
       .inner_join(person::table)
+      .inner_join(inbox::table.on(person::inbox_id.eq(inbox::id)))
       .filter(person::instance_id.eq(instance_id))
       .filter(community::local) // this should be a no-op since community_followers table only has
       // local-person+remote-community or remote-person+local-community
       .filter(not(person::local))
       .filter(community_follower::published.gt(published_since.naive_utc()))
-      .select((
-        community::id,
-        coalesce(person::shared_inbox_url, person::inbox_url),
-      ))
+      .select((community::id, inbox::url))
       .distinct() // only need each community_id, inbox combination once
       .load::<(CommunityId, DbUrl)>(conn)
       .await
@@ -51,10 +50,11 @@ impl CommunityFollowerView {
   ) -> Result<Vec<DbUrl>, Error> {
     let conn = &mut get_conn(pool).await?;
     let res = community_follower::table
+      .inner_join(person::table)
+      .inner_join(inbox::table.on(person::inbox_id.eq(inbox::id)))
       .filter(community_follower::community_id.eq(community_id))
       .filter(not(person::local))
-      .inner_join(person::table)
-      .select(coalesce(person::shared_inbox_url, person::inbox_url))
+      .select(inbox::url)
       .distinct()
       .load::<DbUrl>(conn)
       .await?;

migrations/2024-09-24-110638_only-shared-inbox/down.sql

@@ -0,0 +1,11 @@
+ALTER TABLE person
+    DROP CONSTRAINT person_inbox_id_fkey;
+
+ALTER TABLE person
+    DROP COLUMN inbox_url;
+
+DROP TABLE inbox;
+
+ALTER TABLE person add COLUMN inbox_url character varying(255)  not null default generate_unique_changeme();
+ALTER TABLE person add COLUMN shared_inbox_url character varying(255)  not null default generate_unique_changeme();
+

migrations/2024-09-24-110638_only-shared-inbox/up.sql

@@ -0,0 +1,52 @@
+-- Remove text fields inbox_url, shared_inbox_url from person, community and site.
+-- Instead use a foreign key for these urls so they can be deduplicated.
+-- New inbox table
+-- TODO: add trigger which removes unused inbox items
+CREATE TABLE inbox (
+    id serial PRIMARY KEY,
+    url varchar(255) NOT NULL
+);
+
+-- Move existing inbox values to inbox table, and replace with foreign key
+ALTER TABLE person
+    ADD COLUMN inbox_id int;
+
+WITH inboxes AS (
+    SELECT
+        id AS person_id,
+        coalesce(shared_inbox_url, inbox_url) AS url
+    FROM
+        person
+),
+inserted AS (
+INSERT INTO inbox (url)
+    SELECT
+        url
+    FROM
+        inboxes
+    ON CONFLICT
+        DO NOTHING
+    RETURNING id,
+        url)
+UPDATE
+    person
+SET
+    inbox_id = inserted.id
+FROM
+    inboxes,
+    inserted
+WHERE
+    person.id = inboxes.person_id
+    AND inserted.url = inboxes.url;
+
+ALTER TABLE person
+    ADD CONSTRAINT person_inbox_id_fkey FOREIGN KEY (inbox_id) REFERENCES inbox(id) ON UPDATE CASCADE ON DELETE CASCADE;
+
+ALTER TABLE person
+    ALTER COLUMN inbox_id SET NOT NULL;
+
+-- Drop old columns and rename new one
+ALTER TABLE person DROP COLUMN inbox_url;
+ALTER TABLE person DROP COLUMN shared_inbox_url;
+
+-- TODO: same thing for community and site