use virtuals to get days

db/index.js

@@ -23,14 +23,7 @@ export async function getBookedDays() {
     $or: [{ endDate: { $gt: new Date() } }, { startDate: { $gt: new Date() } }],
   }).exec()
 
-  return bookings
-    .reduce((acc, booking) => {
-      acc.push(
-        getDays({ startDate: booking.startDate, endDate: booking.endDate })
-      )
-      return acc
-    }, [])
-    .flat()
+  return bookings.map((booking) => booking.days).flat()
 }
 
 export async function createBooking({ name, email, startDate, endDate }) {
@@ -44,5 +37,5 @@ export async function createBooking({ name, email, startDate, endDate }) {
   const booking = new Booking({ startDate, endDate, booker: booker._id })
   await booking.save()
   await booking.populate('booker').execPopulate()
-  return booking.toJSON({ getters: true, virtuals: true })
+  return booking.toJSON()
 }

db/schema.js

@@ -26,7 +26,11 @@ export const BookingSchema = new Schema(
       default: 'requested',
     },
   },
-  { timestamps: true }
+  {
+    timestamps: true,
+    toJSON: { virtuals: true, getters: true },
+    toObject: { virtuals: true, getters: true },
+  }
 )
 
 BookingSchema.virtual('days').get(function () {