chore: add default values to time and date fields of models

MagisAir/booking/models.py

 from django.db import models
 from django.http import Http404
 from django.core.validators import RegexValidator,EmailValidator
+from django.utils.timezone import now
 
 # Create your models here.
 
@@ -9,7 +10,7 @@ class Passenger(models.Model):
     First_Name = models.CharField(max_length=50)
     Middle_Initial = models.CharField(max_length=50, blank=True)
     Last_Name = models.CharField(max_length = 50)
-    Birthdate = models.DateField(null=True, blank=True)
+    Birthdate = models.DateField(null=True, blank=True, default=now)
     Age = models.CharField(max_length=3)
     male = 'Male'
     female = 'Female'
@@ -62,10 +63,10 @@ class Additional_Item(models.Model):
 
 class Schedule(models.Model):
     Sched_Code = models.AutoField(primary_key=True, editable=False, unique=True)
-    Flight_Date = models.DateField(null=True, blank=True)
-    Departure_Time = models.TimeField(null=True, blank=True)
-    Arrival_Time = models.TimeField(null=True, blank=True)
-    Duration = models.CharField(max_length=50)
+    Flight_Date = models.DateField(default=now, null=True, blank=True)
+    Departure_Time = models.TimeField(null=True, blank=True, default="00:00:00")
+    Arrival_Time = models.TimeField(null=True, blank=True, default='00:00:00')
+    Duration = models.CharField(max_length=50, default = '0 hr 0 min')
     Flight_Cost = models.IntegerField(default=0)
     Flight_Code = models.ForeignKey(Flight, on_delete=models.CASCADE)
 
@@ -75,7 +76,7 @@ class Schedule(models.Model):
 
 class Booking(models.Model):
     Booking_ID = models.AutoField(primary_key=True, editable=False, unique=True)
-    Booking_Date = models.DateField(null=True, blank=True)
+    Booking_Date = models.DateField(default=now, null=True)
     Total_Cost = models.IntegerField(blank=True, default=0, null=False, editable=False)
     Passenger = models.ForeignKey(Passenger, on_delete=models.CASCADE)
     Additional_Item = models.ManyToManyField(Additional_Item, through='Booking_AddItem')