How to count how many times foreignkey object can be used

Asked Aug 30 '20 at 08:59

Active Aug 30 '20 at 08:59

Viewed 34 times

My models.py

class Timing(models.Model):
    time = models.CharField(max_length=250)
    count = models.IntegerField(default=0) # max=20

class Ticket(models.Model):
    username = models.CharField(max_length=50)
    no = models.ForeignKey(Timing, on_delete=models.CASCADE)

Is there a way I can increment the value of count variable in class Timing by 1 whenever I use no variable to connect object of Timing class (whenever I use the ForeignKey variable)?

asked Aug 30 '20 at 08:59

Heisenberg

When you said *use* do you mean to *call* the variable or you mean something like save the model etc. ? – Dimitar Aug 30 '20 at 09:13
Yes....exactly. – Heisenberg Aug 30 '20 at 09:17
Alright I am pretty sure that you can do that with a custom signal. Checkout this: https://stackoverflow.com/questions/12549977/how-can-i-have-a-django-signal-call-a-model-method – Dimitar Aug 30 '20 at 09:20
Thanks @Dimitar. I'll look into it. – Heisenberg Aug 30 '20 at 09:22

How to count how many times foreignkey object can be used

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