lemmy/lemmy_db/src/views/community/community_follower_view.rs

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use crate::{
schema::{community, community_follower, user_},
source::{
community::{Community, CommunitySafe},
user::{UserSafe, User_},
},
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views::ViewToVec,
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ToSafe,
};
use diesel::{result::Error, *};
use serde::Serialize;
#[derive(Debug, Serialize, Clone)]
pub struct CommunityFollowerView {
pub community: CommunitySafe,
pub follower: UserSafe,
}
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type CommunityFollowerViewTuple = (CommunitySafe, UserSafe);
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impl CommunityFollowerView {
pub fn for_community(conn: &PgConnection, community_id: i32) -> Result<Vec<Self>, Error> {
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let res = community_follower::table
.inner_join(community::table)
.inner_join(user_::table)
.select((Community::safe_columns_tuple(), User_::safe_columns_tuple()))
.filter(community_follower::community_id.eq(community_id))
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.order_by(community_follower::published)
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.load::<CommunityFollowerViewTuple>(conn)?;
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Ok(Self::to_vec(res))
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}
pub fn for_user(conn: &PgConnection, user_id: i32) -> Result<Vec<Self>, Error> {
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let res = community_follower::table
.inner_join(community::table)
.inner_join(user_::table)
.select((Community::safe_columns_tuple(), User_::safe_columns_tuple()))
.filter(community_follower::user_id.eq(user_id))
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.order_by(community_follower::published)
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.load::<CommunityFollowerViewTuple>(conn)?;
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Ok(Self::to_vec(res))
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}
}
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impl ViewToVec for CommunityFollowerView {
type DbTuple = CommunityFollowerViewTuple;
fn to_vec(users: Vec<Self::DbTuple>) -> Vec<Self> {
users
.iter()
.map(|a| Self {
community: a.0.to_owned(),
follower: a.1.to_owned(),
})
.collect::<Vec<Self>>()
}
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}