52 lines
1.3 KiB
Rust
52 lines
1.3 KiB
Rust
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use async_graphql::dataloader::*;
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use async_graphql::*;
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use itertools::Itertools;
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use std::collections::HashMap;
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use std::sync::Arc;
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use crate::models::rolle::Rolle;
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use crate::scalar::Id;
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pub struct BenutzerRollenLoader {
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pub pool: sqlx::PgPool,
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}
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impl Loader<Id> for BenutzerRollenLoader {
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type Value = Vec<Rolle>;
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type Error = Arc<sqlx::Error>;
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async fn load(&self, keys: &[Id]) -> Result<HashMap<Id, Self::Value>, Self::Error> {
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let rows = sqlx::query!(
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r#"
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SELECT
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br.benutzer_id,
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r.id,
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r.rollenname,
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r.erstellt_am,
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r.geaendert_am
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FROM rollen AS r
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LEFT JOIN benutzer_rollen AS br ON r.id = br.rolle_id
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WHERE br.benutzer_id = ANY($1);
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"#,
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keys
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)
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.fetch_all(&self.pool)
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.await?
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.into_iter()
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.map(|row| {
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(
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row.benutzer_id,
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Rolle {
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id: row.id,
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rollenname: row.rollenname,
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erstellt_am: row.erstellt_am,
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geaendert_am: row.geaendert_am,
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},
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)
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})
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.into_group_map();
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Ok(rows)
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}
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}
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