crates/db_views_actor/src/community_follower_view.rs

   1 use crate::structs::CommunityFollowerView;
   2 use diesel::{result::Error, ExpressionMethods, QueryDsl};
   3 use diesel_async::RunQueryDsl;
   4 use lemmy_db_schema::{
   5   newtypes::{CommunityId, PersonId},
   6   schema::{community, community_follower, person},
   7   source::{community::Community, person::Person},
   8   traits::JoinView,
   9   utils::{get_conn, DbPool},
  10 };
  11
  12 type CommunityFollowerViewTuple = (Community, Person);
  13
  14 impl CommunityFollowerView {
  15   pub async fn for_community(pool: &DbPool, community_id: CommunityId) -> Result<Vec<Self>, Error> {
  16     let conn = &mut get_conn(pool).await?;
  17     let res = community_follower::table
  18       .inner_join(community::table)
  19       .inner_join(person::table)
  20       .select((community::all_columns, person::all_columns))
  21       .filter(community_follower::community_id.eq(community_id))
  22       .order_by(community::title)
  23       .load::<CommunityFollowerViewTuple>(conn)
  24       .await?;
  25
  26     Ok(res.into_iter().map(Self::from_tuple).collect())
  27   }
  28
  29   pub async fn for_person(pool: &DbPool, person_id: PersonId) -> Result<Vec<Self>, Error> {
  30     let conn = &mut get_conn(pool).await?;
  31     let res = community_follower::table
  32       .inner_join(community::table)
  33       .inner_join(person::table)
  34       .select((community::all_columns, person::all_columns))
  35       .filter(community_follower::person_id.eq(person_id))
  36       .filter(community::deleted.eq(false))
  37       .filter(community::removed.eq(false))
  38       .order_by(community::title)
  39       .load::<CommunityFollowerViewTuple>(conn)
  40       .await?;
  41
  42     Ok(res.into_iter().map(Self::from_tuple).collect())
  43   }
  44 }
  45
  46 impl JoinView for CommunityFollowerView {
  47   type JoinTuple = CommunityFollowerViewTuple;
  48   fn from_tuple(a: Self::JoinTuple) -> Self {
  49     Self {
  50       community: a.0,
  51       follower: a.1,
  52     }
  53   }
  54 }