crates/db_views_actor/src/person_block_view.rs

   1 use crate::structs::PersonBlockView;
   2 use diesel::{result::Error, ExpressionMethods, JoinOnDsl, QueryDsl};
   3 use diesel_async::RunQueryDsl;
   4 use lemmy_db_schema::{
   5   newtypes::PersonId,
   6   schema::{person, person_block},
   7   source::person::Person,
   8   traits::JoinView,
   9   utils::{get_conn, DbPool},
  10 };
  11
  12 type PersonBlockViewTuple = (Person, Person);
  13
  14 impl PersonBlockView {
  15   pub async fn for_person(pool: &DbPool, person_id: PersonId) -> Result<Vec<Self>, Error> {
  16     let conn = &mut get_conn(pool).await?;
  17     let target_person_alias = diesel::alias!(person as person1);
  18
  19     let res = person_block::table
  20       .inner_join(person::table.on(person_block::person_id.eq(person::id)))
  21       .inner_join(
  22         target_person_alias.on(person_block::target_id.eq(target_person_alias.field(person::id))),
  23       )
  24       .select((
  25         person::all_columns,
  26         target_person_alias.fields(person::all_columns),
  27       ))
  28       .filter(person_block::person_id.eq(person_id))
  29       .filter(target_person_alias.field(person::deleted).eq(false))
  30       .order_by(person_block::published)
  31       .load::<PersonBlockViewTuple>(conn)
  32       .await?;
  33
  34     Ok(res.into_iter().map(Self::from_tuple).collect())
  35   }
  36 }
  37
  38 impl JoinView for PersonBlockView {
  39   type JoinTuple = PersonBlockViewTuple;
  40   fn from_tuple(a: Self::JoinTuple) -> Self {
  41     Self {
  42       person: a.0,
  43       target: a.1,
  44     }
  45   }
  46 }