Remove unnessesary id columns from relation tables.

CHANGELOG.md

@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 The format is based on
 [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## Unreleased
+
+* Removed unnessesary id columns from relation tables.
+
+
 ## Release 0.12.0 (2023-02-26)
 
 * Database access is now async (PR #10).

migrations/2023-02-26-185729_drop-extra-ids/down.sql

@@ -0,0 +1,6 @@
+alter table photo_tags drop constraint photo_tags_pkey;
+alter table photo_tags add column id serial primary key;
+alter table photo_people drop constraint photo_people_pkey;
+alter table photo_people add column id serial primary key;
+alter table photo_places drop constraint photo_places_pkey;
+alter table photo_places add column id serial primary key;

migrations/2023-02-26-185729_drop-extra-ids/up.sql

@@ -0,0 +1,8 @@
+alter table photo_tags drop column id;
+alter table photo_tags add primary key (photo_id, tag_id);
+
+alter table photo_people drop column id;
+alter table photo_people add primary key (photo_id, person_id);
+
+alter table photo_places drop column id;
+alter table photo_places add primary key (photo_id, place_id);

src/models.rs

@@ -329,7 +329,6 @@ impl Facet for Person {
 
 #[derive(Debug, Clone, Queryable)]
 pub struct PhotoPerson {
-    pub id: i32,
     pub photo_id: i32,
     pub person_id: i32,
 }
@@ -355,7 +354,6 @@ impl Facet for Place {
 
 #[derive(Debug, Clone, Queryable)]
 pub struct PhotoPlace {
-    pub id: i32,
     pub photo_id: i32,
     pub place_id: i32,
 }

src/schema.rs

@@ -22,24 +22,21 @@ table! {
 }
 
 table! {
-    photo_people (id) {
-        id -> Int4,
+    photo_people (photo_id, person_id) {
         photo_id -> Int4,
         person_id -> Int4,
     }
 }
 
 table! {
-    photo_places (id) {
-        id -> Int4,
+    photo_places (photo_id, place_id) {
         photo_id -> Int4,
         place_id -> Int4,
     }
 }
 
 table! {
-    photo_tags (id) {
-        id -> Int4,
+    photo_tags (photo_id, tag_id) {
         photo_id -> Int4,
         tag_id -> Int4,
     }