lemmy/crates/db_views/src/site_view.rs

use crate::structs::SiteView;
use diesel::{result::Error, ExpressionMethods, JoinOnDsl, QueryDsl};
use diesel_async::RunQueryDsl;
use lemmy_db_schema::{
  schema::{local_site, local_site_rate_limit, site, site_aggregates},
  utils::{get_conn, DbPool},
};

impl SiteView {
  pub async fn read_local(pool: &mut DbPool<'_>) -> Result<Self, Error> {
    let conn = &mut get_conn(pool).await?;
    site::table
      .inner_join(local_site::table)
      .inner_join(
        local_site_rate_limit::table.on(local_site::id.eq(local_site_rate_limit::local_site_id)),
      )
      .inner_join(site_aggregates::table)
      .select((
        site::all_columns,
        local_site::all_columns,
        local_site_rate_limit::all_columns,
        site_aggregates::all_columns,
      ))
      .first::<SiteView>(conn)
      .await
  }
}