lemmy/lemmy_db/src/views/community_view.rs

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use crate::{
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aggregates::community_aggregates::CommunityAggregates,
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category::Category,
community::{Community, CommunityFollower},
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schema::{category, community, community_aggregates, community_follower, user_},
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user::{UserSafe, User_},
};
use diesel::{result::Error, *};
use serde::Serialize;
#[derive(Debug, Serialize, Clone)]
pub struct CommunityView {
pub community: Community,
pub creator: UserSafe,
pub category: Category,
pub subscribed: bool,
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pub counts: CommunityAggregates,
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}
impl CommunityView {
pub fn read(
conn: &PgConnection,
community_id: i32,
my_user_id: Option<i32>,
) -> Result<Self, Error> {
let subscribed = match my_user_id {
Some(user_id) => {
let res = community_follower::table
.filter(community_follower::community_id.eq(community_id))
.filter(community_follower::user_id.eq(user_id))
.get_result::<CommunityFollower>(conn);
res.is_ok()
}
None => false,
};
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let (community, creator, category, counts) = community::table
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.find(community_id)
.inner_join(user_::table)
.inner_join(category::table)
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.inner_join(community_aggregates::table)
.first::<(Community, User_, Category, CommunityAggregates)>(conn)?;
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Ok(CommunityView {
community,
creator: creator.to_safe(),
category,
subscribed,
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counts,
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})
}
}