populate days on save

db/booking.ts

@@ -1,5 +1,6 @@
 import * as mongoose from 'mongoose'
 import { v4 as uuidv4 } from 'uuid'
+import { startOfDay } from 'date-fns'
 import { dateFormatBackend, getDays } from '../helpers/date'
 import { BillDocument } from './bill'
 import { BookerDocument } from './booker'
@@ -54,6 +55,10 @@ const BookingSchema = new mongoose.Schema<BookingDocument>(
       get: dateFormatBackend,
       min: new Date(),
     },
+    days: {
+      type: [String],
+      required: true,
+    },
     status: {
       type: String,
       enum: Object.values(BOOKING_STATUS),
@@ -71,27 +76,29 @@ const BookingSchema = new mongoose.Schema<BookingDocument>(
   }
 )
 
-BookingSchema.virtual('days').get(function () {
-  return getDays({
-    startDate: new Date(this.startDate),
-    endDate: new Date(this.endDate),
+BookingSchema.pre('save', function (next) {
+  const booking = this as BookingDocument
+  booking.days = getDays({
+    startDate: new Date(booking.startDate),
+    endDate: new Date(booking.endDate),
   })
+  next()
 })
 
 BookingSchema.static('findBookedDays', async function (): Promise<string[]> {
-  const bookings = await this.find(
-    {
-      status: { $in: [BOOKING_STATUS.REQUESTED, BOOKING_STATUS.CONFIRMED] },
-      $or: [
-        { endDate: { $gt: new Date() } },
-        { startDate: { $gt: new Date() } },
-      ],
-    },
-    'startDate endDate'
-  ).exec()
+  const model = this as BookingModel
+  const bookedDays = await model
+    .find(
+      {
+        status: { $in: [BOOKING_STATUS.REQUESTED, BOOKING_STATUS.CONFIRMED] },
+        endDate: { $gt: startOfDay(new Date()) },
+      },
+      'days'
+    )
+    .exec()
 
-  return bookings
-    .map((booking: BookingDocument) => booking.days)
+  return bookedDays
+    .map((b) => b.days)
     .flat()
     .sort()
 })