Added a query to get the absents of month as per #27

src/graphql/queries/attendance_queries.rs

@@ -1,7 +1,8 @@
 use std::sync::Arc;
 
-use crate::models::attendance::{Attendance, AttendanceWithMember};
+use crate::models::attendance::{AbsentsWithMember, Attendance, AttendanceWithMember};
 use async_graphql::{Context, Object, Result};
+use chrono::Datelike;
 use chrono::NaiveDate;
 use sqlx::PgPool;
 
@@ -41,4 +42,40 @@ impl AttendanceQueries {
 
         Ok(records)
     }
+
+    async fn absents_by_month(
+        &self,
+        ctx: &Context<'_>,
+        date: NaiveDate,
+    ) -> Result<Vec<AbsentsWithMember>> {
+        let pool = ctx.data::<Arc<PgPool>>().expect("Pool must be in context.");
+
+        let end_date = date
+            .with_day(1)
+            .unwrap()
+            .with_month(date.month() + 1)
+            .unwrap();
+
+        let records = sqlx::query_as::<_, AbsentsWithMember>(
+            "SELECT mem.name, mem.year, att.member_id,
+                COUNT(*) AS absent_days
+            FROM attendance att
+            JOIN member mem ON att.member_id = mem.member_id
+            WHERE
+                att.is_present = FALSE
+                AND att.date >= $1
+                AND att.date < $2
+            GROUP BY
+                att.member_id, mem.name, mem.year
+            ORDER BY
+                absent_days DESC, mem.name
+            ",
+        )
+        .bind(date)
+        .bind(end_date)
+        .fetch_all(pool.as_ref())
+        .await?;
+
+        Ok(records)
+    }
 }

src/models/attendance.rs

@@ -58,3 +58,11 @@ pub struct AttendanceWithMember {
     pub year: i32,
     pub group_id: i32,
 }
+
+#[derive(SimpleObject, FromRow)]
+pub struct AbsentsWithMember {
+    pub member_id: i32,
+    pub absent_days: i64,
+    pub name: String,
+    pub year: i32,
+}