Archives/lemmy
2
0
Fork 0
mirror of https://github.com/LemmyNet/lemmy synced 2024-11-17 09:25:50 +00:00
Code Issues Packages Projects Releases Wiki Activity

Create comment in transaction. Fixes #3741 (#4265)

Browse Source 
* Create comment in transaction. Fixes #3741

* Removing if let on comment create.
This commit is contained in:
Dessalines 2023-12-15 05:36:58 -05:00 committed by GitHub
parent 246e38a45b
commit 719b76a6e7
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 51 additions and 48 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

99
crates/db_schema/src/impls/comment.rs
View File

@ -59,52 +59,55 @@ impl Comment {
) -> Result<Comment, Error> {
let conn = &mut get_conn(pool).await?;
// Insert, to get the id
let inserted_comment = insert_into(comment)
.values(comment_form)
.on_conflict(ap_id)
.do_update()
.set(comment_form)
.get_result::<Self>(conn)
.await;
conn
.build_transaction()
.run(|conn| {
Box::pin(async move {
// Insert, to get the id
let inserted_comment = insert_into(comment)
.values(comment_form)
.on_conflict(ap_id)
.do_update()
.set(comment_form)
.get_result::<Self>(conn)
.await?;
if let Ok(comment_insert) = inserted_comment {
let comment_id = comment_insert.id;
let comment_id = inserted_comment.id;
// You need to update the ltree column
let ltree = Ltree(if let Some(parent_path) = parent_path {
// The previous parent will already have 0 in it
// Append this comment id
format!("{}.{}", parent_path.0, comment_id)
} else {
// '0' is always the first path, append to that
format!("{}.{}", 0, comment_id)
});
// You need to update the ltree column
let ltree = Ltree(if let Some(parent_path) = parent_path {
// The previous parent will already have 0 in it
// Append this comment id
format!("{}.{}", parent_path.0, comment_id)
} else {
// '0' is always the first path, append to that
format!("{}.{}", 0, comment_id)
});
let updated_comment = diesel::update(comment.find(comment_id))
.set(path.eq(ltree))
.get_result::<Self>(conn)
.await;
let updated_comment = diesel::update(comment.find(comment_id))
.set(path.eq(ltree))
.get_result::<Self>(conn)
.await;
// Update the child count for the parent comment_aggregates
// You could do this with a trigger, but since you have to do this manually anyway,
// you can just have it here
if let Some(parent_path) = parent_path {
// You have to update counts for all parents, not just the immediate one
// TODO if the performance of this is terrible, it might be better to do this as part of a
// scheduled query... although the counts would often be wrong.
//
// The child_count query for reference:
// select c.id, c.path, count(c2.id) as child_count from comment c
// left join comment c2 on c2.path <@ c.path and c2.path != c.path
// group by c.id
// Update the child count for the parent comment_aggregates
// You could do this with a trigger, but since you have to do this manually anyway,
// you can just have it here
if let Some(parent_path) = parent_path {
// You have to update counts for all parents, not just the immediate one
// TODO if the performance of this is terrible, it might be better to do this as part of a
// scheduled query... although the counts would often be wrong.
//
// The child_count query for reference:
// select c.id, c.path, count(c2.id) as child_count from comment c
// left join comment c2 on c2.path <@ c.path and c2.path != c.path
// group by c.id
let parent_id = parent_path.0.split('.').nth(1);
let parent_id = parent_path.0.split('.').nth(1);
if let Some(parent_id) = parent_id {
let top_parent = format!("0.{}", parent_id);
let update_child_count_stmt = format!(
"
if let Some(parent_id) = parent_id {
let top_parent = format!("0.{}", parent_id);
let update_child_count_stmt = format!(
"
update comment_aggregates ca set child_count = c.child_count
from (
select c.id, c.path, count(c2.id) as child_count from comment c
@ -113,15 +116,15 @@ from (
group by c.id
) as c
where ca.comment_id = c.id"
);
);
sql_query(update_child_count_stmt).execute(conn).await?;
}
}
updated_comment
} else {
inserted_comment
}
sql_query(update_child_count_stmt).execute(conn).await?;
}
}
updated_comment
}) as _
})
.await
}
pub async fn read_from_apub_id(
pool: &mut DbPool<'_>,