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https://github.com/LemmyNet/lemmy.git
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1b5437cbe3
* Addressing slow profile queries. #2777 * Addressing PR comments.
74 lines
2.5 KiB
Rust
74 lines
2.5 KiB
Rust
use crate::structs::CommunityModeratorView;
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use diesel::{result::Error, ExpressionMethods, QueryDsl};
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use diesel_async::RunQueryDsl;
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use lemmy_db_schema::{
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newtypes::{CommunityId, PersonId},
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schema::{community, community_moderator, person},
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source::{community::Community, person::Person},
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traits::JoinView,
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utils::{get_conn, DbPool},
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};
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type CommunityModeratorViewTuple = (Community, Person);
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impl CommunityModeratorView {
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pub async fn for_community(pool: &DbPool, community_id: CommunityId) -> Result<Vec<Self>, Error> {
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let conn = &mut get_conn(pool).await?;
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let res = community_moderator::table
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.inner_join(community::table)
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.inner_join(person::table)
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.select((community::all_columns, person::all_columns))
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.filter(community_moderator::community_id.eq(community_id))
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.load::<CommunityModeratorViewTuple>(conn)
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.await?;
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Ok(res.into_iter().map(Self::from_tuple).collect())
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}
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pub async fn for_person(pool: &DbPool, person_id: PersonId) -> Result<Vec<Self>, Error> {
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let conn = &mut get_conn(pool).await?;
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let res = community_moderator::table
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.inner_join(community::table)
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.inner_join(person::table)
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.select((community::all_columns, person::all_columns))
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.filter(community_moderator::person_id.eq(person_id))
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.filter(community::deleted.eq(false))
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.filter(community::removed.eq(false))
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.load::<CommunityModeratorViewTuple>(conn)
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.await?;
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Ok(res.into_iter().map(Self::from_tuple).collect())
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}
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/// Finds all communities first mods / creators
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/// Ideally this should be a group by, but diesel doesn't support it yet
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pub async fn get_community_first_mods(pool: &DbPool) -> Result<Vec<Self>, Error> {
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let conn = &mut get_conn(pool).await?;
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let res = community_moderator::table
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.inner_join(community::table)
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.inner_join(person::table)
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.select((community::all_columns, person::all_columns))
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// A hacky workaround instead of group_bys
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// https://stackoverflow.com/questions/24042359/how-to-join-only-one-row-in-joined-table-with-postgres
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.distinct_on(community_moderator::community_id)
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.order_by((
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community_moderator::community_id,
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community_moderator::person_id,
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))
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.load::<CommunityModeratorViewTuple>(conn)
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.await?;
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Ok(res.into_iter().map(Self::from_tuple).collect())
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}
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}
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impl JoinView for CommunityModeratorView {
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type JoinTuple = CommunityModeratorViewTuple;
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fn from_tuple(a: Self::JoinTuple) -> Self {
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Self {
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community: a.0,
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moderator: a.1,
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}
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}
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}
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