fix price history missing entries

.sqlx/query-48944b01f74bc796d58c26eedf9025b641910dc475b48556855f10f59112e367.json

@@ -1,6 +1,6 @@
 {
   "db_name": "PostgreSQL",
-  "query": "SELECT date, canteen, price_students, price_employees, price_guests FROM meals WHERE LOWER(\"name\") = $1 AND is_latest = TRUE",
+  "query": "SELECT date, canteen, price_students, price_employees, price_guests FROM meals WHERE LOWER(\"name\") = $1 AND is_latest = TRUE ORDER BY date DESC LIMIT $2;",
   "describe": {
     "columns": [
       {
@@ -31,7 +31,8 @@
     ],
     "parameters": {
       "Left": [
-        "Text"
+        "Text",
+        "Int8"
       ]
     },
     "nullable": [
@@ -42,5 +43,5 @@
       false
     ]
   },
-  "hash": "56b320a7188c5ee88c869e763f6d23ee37461894a3b20c850908923460c3d3a0"
+  "hash": "48944b01f74bc796d58c26eedf9025b641910dc475b48556855f10f59112e367"
 }

.sqlx/query-781e98dce280715896a347808d891ff02e2c609c161e9c935a76fa9d63e61696.json

@@ -1,6 +1,6 @@
 {
   "db_name": "PostgreSQL",
-  "query": "SELECT date, price_students, price_employees, price_guests FROM meals WHERE canteen = $1 AND LOWER(\"name\") = $2 AND is_latest = TRUE",
+  "query": "SELECT date, price_students, price_employees, price_guests FROM meals WHERE canteen = $1 AND LOWER(\"name\") = $2 AND is_latest = TRUE ORDER BY date DESC LIMIT $3;",
   "describe": {
     "columns": [
       {
@@ -27,7 +27,8 @@
     "parameters": {
       "Left": [
         "Text",
-        "Text"
+        "Text",
+        "Int8"
       ]
     },
     "nullable": [
@@ -37,5 +38,5 @@
       false
     ]
   },
-  "hash": "1477fded8be083c2d5e29a92f9e558c9855ad90020dc1199bce0d20cca02799d"
+  "hash": "781e98dce280715896a347808d891ff02e2c609c161e9c935a76fa9d63e61696"
 }

.sqlx/query-da9537a50cbe6a27836af42e7e333581826a3f87131f001f2db3ef39b88b746e.json

@@ -1,6 +1,6 @@
 {
   "db_name": "PostgreSQL",
-  "query": "SELECT date, canteen, price_students, price_employees, price_guests FROM meals WHERE canteen = ANY($1) AND LOWER(\"name\") = $2 AND is_latest = TRUE",
+  "query": "SELECT date, canteen, price_students, price_employees, price_guests FROM meals WHERE canteen = ANY($1) AND LOWER(\"name\") = $2 AND is_latest = TRUE ORDER BY date DESC LIMIT $3;",
   "describe": {
     "columns": [
       {
@@ -32,7 +32,8 @@
     "parameters": {
       "Left": [
         "TextArray",
-        "Text"
+        "Text",
+        "Int8"
       ]
     },
     "nullable": [
@@ -43,5 +44,5 @@
       false
     ]
   },
-  "hash": "cdf76d5e7d5d61d3cc61411d526816996885ccbd07237847c57f62cc3b6357db"
+  "hash": "da9537a50cbe6a27836af42e7e333581826a3f87131f001f2db3ef39b88b746e"
 }

web-api/src/endpoints/price_history.rs

@@ -22,6 +22,7 @@ pub fn configure(cfg: &mut ServiceConfig) {
 #[serde(rename_all = "camelCase")]
 struct PriceHistoryQuery {
     canteens: Option<String>,
+    limit: Option<u32>,
 }
 
 #[derive(Debug, Clone, Deserialize, FromRow)]
@@ -45,6 +46,7 @@ async fn price_history(
         .as_deref()
         .map(util::parse_canteens_comma_separated);
     let dish_name = path.into_inner();
+    let limit = query.limit.unwrap_or(1000) as i64;
 
     if let Some(canteens) = canteens {
         if canteens.iter().all(Result::is_ok) {
@@ -54,9 +56,10 @@ async fn price_history(
                 let canteen = canteens.into_iter().next().expect("length is 1");
 
                 let res = sqlx::query!(
-                    r#"SELECT date, price_students, price_employees, price_guests FROM meals WHERE canteen = $1 AND LOWER("name") = $2 AND is_latest = TRUE"#,
+                    r#"SELECT date, price_students, price_employees, price_guests FROM meals WHERE canteen = $1 AND LOWER("name") = $2 AND is_latest = TRUE ORDER BY date DESC LIMIT $3;"#,
                     canteen.get_identifier(),
                     dish_name.to_lowercase(),
+                    limit,
                 )
                 .fetch_all(db)
                 .await;
@@ -89,9 +92,10 @@ async fn price_history(
                 }
             } else {
                 let res = sqlx::query_as!(PriceHistoryRow,
-                    r#"SELECT date, canteen, price_students, price_employees, price_guests FROM meals WHERE canteen = ANY($1) AND LOWER("name") = $2 AND is_latest = TRUE"#,
+                    r#"SELECT date, canteen, price_students, price_employees, price_guests FROM meals WHERE canteen = ANY($1) AND LOWER("name") = $2 AND is_latest = TRUE ORDER BY date DESC LIMIT $3;"#,
                     &canteens.iter().map(|c| c.get_identifier().to_string()).collect_vec(),
                     dish_name.to_lowercase(),
+                    limit
                 )
                 .fetch_all(db)
                 .await;
@@ -118,8 +122,9 @@ async fn price_history(
         }
     } else {
         let res = sqlx::query_as!(PriceHistoryRow,
-            r#"SELECT date, canteen, price_students, price_employees, price_guests FROM meals WHERE LOWER("name") = $1 AND is_latest = TRUE"#,
+            r#"SELECT date, canteen, price_students, price_employees, price_guests FROM meals WHERE LOWER("name") = $1 AND is_latest = TRUE ORDER BY date DESC LIMIT $2;"#,
             dish_name.to_lowercase(),
+            limit as i64,
         )
         .fetch_all(db)
         .await;
@@ -144,6 +149,7 @@ fn structure_multiple_canteens(
     v: Vec<PriceHistoryRow>,
 ) -> BTreeMap<String, BTreeMap<NaiveDate, DishPrices>> {
     v.into_iter()
+        .sorted_by_cached_key(|r| r.canteen.clone())
         .chunk_by(|r| r.canteen.clone())
         .into_iter()
         .map(|(d, g)| {