Dont throw error on empty LocalUser::update

crates/api/src/local_user/add_admin.rs

@@ -29,7 +29,7 @@ pub async fn add_admin(
     .await?
     .ok_or(LemmyErrorType::ObjectNotLocal)?;
 
-  let added_admin = LocalUser::update(
+  LocalUser::update(
     &mut context.pool(),
     added_local_user.local_user.id,
     &LocalUserUpdateForm {
@@ -43,7 +43,7 @@ pub async fn add_admin(
   // Mod tables
   let form = ModAddForm {
     mod_person_id: local_user_view.person.id,
-    other_person_id: added_admin.person_id,
+    other_person_id: added_local_user.person.id,
     removed: Some(!data.added),
   };
 

crates/api/src/local_user/save_settings.rs

@@ -141,11 +141,7 @@ pub async fn save_user_settings(
     ..Default::default()
   };
 
-  // Ignore errors, because 'no fields updated' will return an error.
-  // https://github.com/LemmyNet/lemmy/issues/4076
-  LocalUser::update(&mut context.pool(), local_user_id, &local_user_form)
-    .await
-    .ok();
+  LocalUser::update(&mut context.pool(), local_user_id, &local_user_form).await?;
 
   // Update the vote display modes
   let vote_display_modes_form = LocalUserVoteDisplayModeUpdateForm {

crates/api/src/local_user/verify_email.rs

@@ -9,12 +9,10 @@ use lemmy_db_schema::{
   source::{
     email_verification::EmailVerification,
     local_user::{LocalUser, LocalUserUpdateForm},
-    person::Person,
   },
-  traits::Crud,
   RegistrationMode,
 };
-use lemmy_db_views::structs::SiteView;
+use lemmy_db_views::structs::{LocalUserView, SiteView};
 use lemmy_utils::error::{LemmyErrorType, LemmyResult};
 
 pub async fn verify_email(
@@ -38,20 +36,24 @@ pub async fn verify_email(
   };
   let local_user_id = verification.local_user_id;
 
-  let local_user = LocalUser::update(&mut context.pool(), local_user_id, &form).await?;
+  LocalUser::update(&mut context.pool(), local_user_id, &form).await?;
 
   EmailVerification::delete_old_tokens_for_local_user(&mut context.pool(), local_user_id).await?;
 
   // send out notification about registration application to admins if enabled
   if site_view.local_site.registration_mode == RegistrationMode::RequireApplication
     && site_view.local_site.application_email_admins
   {
-    let person = Person::read(&mut context.pool(), local_user.person_id)
+    let local_user = LocalUserView::read(&mut context.pool(), local_user_id)
       .await?
       .ok_or(LemmyErrorType::CouldntFindPerson)?;
 
-    send_new_applicant_email_to_admins(&person.name, &mut context.pool(), context.settings())
-      .await?;
+    send_new_applicant_email_to_admins(
+      &local_user.person.name,
+      &mut context.pool(),
+      context.settings(),
+    )
+    .await?;
   }
 
   Ok(Json(SuccessResponse::default()))

crates/apub/src/api/user_settings_backup.rs

@@ -133,8 +133,7 @@ pub async fn import_settings(
     local_user_view.local_user.id,
     &local_user_form,
   )
-  .await
-  .ok();
+  .await?;
 
   // Update the vote display mode settings
   let vote_display_mode_form = LocalUserVoteDisplayModeUpdateForm {

crates/db_schema/src/impls/local_user.rs

@@ -55,12 +55,17 @@ impl LocalUser {
     pool: &mut DbPool<'_>,
     local_user_id: LocalUserId,
     form: &LocalUserUpdateForm,
-  ) -> Result<LocalUser, Error> {
+  ) -> Result<usize, Error> {
     let conn = &mut get_conn(pool).await?;
-    diesel::update(local_user::table.find(local_user_id))
+    let res = diesel::update(local_user::table.find(local_user_id))
       .set(form)
-      .get_result::<Self>(conn)
-      .await
+      .execute(conn)
+      .await;
+    // Diesel will throw an error if the query is all Nones (not updating anything), ignore this.
+    match res {
+      Err(Error::QueryBuilderError(_)) => Ok(0),
+      other => other,
+    }
   }
 
   pub async fn delete(pool: &mut DbPool<'_>, id: LocalUserId) -> Result<usize, Error> {