how to make it so that if you change the value from true to false or vice versa in one place, all others change. class Ralevant default is True class Rooms default is True class Registration value changes and if in the registration class you change from true to false, then the Room class and Ralevant should also change

from django.contrib.auth.models import User
import datetime

class Ralevant(models.Model):
    bool_roo = models.BooleanField(default=True)

    def __str__(self):
        return f'{self.bool_roo}'
year=datetime.datetime.now().year
month=datetime.datetime.now().month
day = datetime.datetime.now().day

class Rooms(models.Model):
    room_num = models.IntegerField()
    room_bool = models.ForeignKey(Ralevant, on_delete=models.CASCADE,
                                  related_name='name1')  
    category = models.CharField(max_length=150)
    def __str__(self):
        return f'{self.room_num}'

class Registration(models.Model):
    rooms = models.ForeignKey(Rooms, on_delete=models.CASCADE)
    first_name = models.CharField(max_length=150)
    last_name = models.CharField(max_length=150)
    admin = models.ForeignKey(User, on_delete=models.CASCADE)
    pasport_serial_num = models.CharField(max_length=100)
    birth_date = models.DateField()
    img = models.FileField()
    visit_date = models.DateTimeField()
    leave_date = models.DateTimeField(default=datetime.datetime(year=year,month=month,day=day 1,hour=12,minute=00,second=00))
    guest_count = models.IntegerField()
    room_bool = models.ForeignKey(Ralevant, on_delete=models.CASCADE,
                                  related_name='name2')
    def __str__(self):
        return self.rooms,self.last_name,self.first_name

CodePudding user response：

You can implement it in your views.py or in your serializers.py, simple import model and update Model.objects.filter(pk=obj.pk).update() something like that

CodePudding user response：

    def obj(request, pk,):
    reg = Registration.objects.get(pk=pk)
    room = Rooms.objects.get(pk=pk)
    if reg.room_bool == True:
        room.room_bool = True
        room.save()

    if reg.room_bool == False:
        room.room_bool = False
        room.save()