Let's try that?

Author: bagelbits

src/controllers/api/2014/classController.ts

@@ -200,12 +200,12 @@ export const showSpellsForClass = async (req: Request, res: Response, next: Next
     }
 
     const urlString = '/api/2014/classes/' + index
-    const findQuery: { 'classes.url': string; level?: { $in: string[] } } = {
+    const findQuery: { 'classes.url': string; level?: { $in: number[] } } = {
       'classes.url': urlString
     }
 
     if (level !== undefined) {
-      findQuery.level = { $in: level }
+      findQuery.level = { $in: level.map(Number) }
     }
 
     const data = await Spell.find(findQuery)

src/controllers/api/2014/spellController.ts

@@ -6,7 +6,7 @@ import { escapeRegExp, redisClient, ResourceList } from '@/util'
 
 interface IndexQuery {
   name?: { $regex: RegExp }
-  level?: { $in: string[] }
+  level?: { $in: number[] }
   'school.name'?: { $in: RegExp[] }
 }
 
@@ -26,7 +26,7 @@ export const index = async (req: Request, res: Response, next: NextFunction) =>
     }
 
     if (level !== undefined) {
-      searchQueries.level = { $in: level }
+      searchQueries.level = { $in: level.map(Number) }
     }
 
     if (school !== undefined) {