how to save django data in to tow model - django

Question

hi please help me i have to model i want after create and save store the result save to main store
like this
store.name == mainstore.name
store.the_rest_of_quantity==mainstore.quantity
i trying to use signals but i fail
class Store(models.Model):
CHOICES = (
('NUM','number'),
('M','meter'),
)
name = models.CharField(max_length=60)
quantity = models.PositiveSmallIntegerField (validators=[MinValueValidator(0)],default=0,blank=True,null=True)
date_of_add = models.DateTimeField(auto_now_add=True)
add_new_item = models.PositiveSmallIntegerField (validators=[MinValueValidator(0)],default=0,blank=True,null=True)
date_of_remove = models.DateTimeField(auto_now =True)
remove_old_item = models.PositiveSmallIntegerField (validators=[MinValueValidator(0)],default=0,blank=True,null=True)
the_rest_of_quantity = models.PositiveSmallIntegerField (validators=[MinValueValidator(0)],default=0,blank=True,null=True)
accept_stor = models.BooleanField(default = False)
classyfiyed = models.CharField(max_length=3,choices=CHOICES,blank=True,null=True)
def __str__(self):
return 'Device Name :( {0} ) Have Quantity({1}) '.format(self.name,self.quantity)
def save(self, *args, **kwargs):
try:
totla_sum = sum([self.quantity , self.add_new_item])
self.the_rest_of_quantity = int(totla_sum - self.remove_old_item)
except Expression as identifier:
'you add remove bigger than quantity'
return super().save(*args, **kwargs)
class MainStore(models.Model):
name = models.CharField(max_length=120)
quantity = models.PositiveIntegerField (null=True,default=0)
store = models.OneToOneField(Army,on_delete=models.CASCADE,related_name='Store',null=True)

Answer 1

i use signals for solve it
signals.py
#receiver(post_save,sender=Store)
def create_store(sender,instance,created,**kwargs):
if created:
MainStore.objects.get_or_create(Store=instance,name=instance.name,quantity=instance.the_rest_of_quantity)
else:
obj_store = MainStore.objects.filter(Store=instance)
update_store = obj_store.update(name=instance.name,quantity=instance.the_rest_of_quantity)
return update_store
apps.py
from django.apps import AppConfig
class StoreConfig(AppConfig):
default_auto_field = 'django.db.models.BigAutoField'
name = 'Store'
def ready(self):
import Store.signals
init.py
default_app_config = "Store.apps.StoreConfig"