check if already cox on planned events

src/model/usertrip.rs

@@ -14,6 +14,7 @@ impl UserTrip {
             return Err(UserTripError::EventAlreadyFull);
         }
 
+        //check if cox if own event
         let is_cox = sqlx::query!(
             "SELECT count(*) as amount
             FROM trip 
@@ -29,6 +30,24 @@ impl UserTrip {
             return Err(UserTripError::AlreadyRegisteredAsCox);
         }
 
+        //check if cox if planned_event
+        let is_cox = sqlx::query!(
+            "SELECT count(*) as amount
+            FROM trip 
+            WHERE planned_event_id = (
+                SELECT id FROM planned_event WHERE trip_details_id = ?
+            ) 
+            AND cox_id = ?",
+            trip_details_id,
+            user_id
+        )
+        .fetch_one(db)
+        .await
+        .unwrap();
+        if is_cox.amount > 0 {
+            return Err(UserTripError::AlreadyRegisteredAsCox);
+        }
+
         match sqlx::query!(
             "INSERT INTO user_trip (user_id, trip_details_id) VALUES(?, ?)",
             user_id,