ref: remove signals in favor of save() override

app/base/signals/__init__.py

@@ -1,7 +0,0 @@
-from app.base.signals.booking import booking_post_save
-from app.base.signals.person import person_post_save
-from app.base.signals.transaction import (
-    transaction_pre_save,
-    transaction_post_save,
-    transaction_pre_delete
-)

app/base/signals/booking.py

@@ -1,29 +0,0 @@
-from django.db.models.signals import post_save
-from django.dispatch import receiver
-
-from app.base.models import Transaction, Booking
-
-
-@receiver(post_save, sender=Booking)
-def booking_post_save(sender, instance: Booking, created: bool, **kwargs):
-    amount = instance.calculated_price
-    with_transaction = instance.end_time and amount
-    description = f'{instance.type.label} ({instance.duration or 0} Min)'
-
-    # Create or update existing Transaction
-    transaction = Transaction.objects.filter(booking=instance).first()
-    if transaction:
-        if with_transaction:
-            transaction.amount = -amount
-            transaction.description = description
-            transaction.save()
-        else:
-            transaction.delete()
-
-    elif with_transaction:
-        Transaction.objects.create(
-            account=instance.user.account,
-            amount=-amount,
-            description=description,
-            booking=instance,
-        )

app/base/signals/person.py

@@ -1,9 +0,0 @@
-from django.dispatch import receiver
-from django.db.models.signals import post_save
-from app.base.models import Person, Account
-
-
-@receiver(post_save, sender=Person)
-def person_post_save(sender, instance: Person, created: bool, **kwargs):
-    if created:
-        Account.objects.create(user=instance)

app/base/signals/transaction.py

@@ -1,28 +0,0 @@
-from django.dispatch import receiver
-from django.db.models.signals import pre_save, post_save, pre_delete
-from app.base.models import Transaction
-
-
-@receiver(pre_save, sender=Transaction)
-def transaction_pre_save(sender, instance: Transaction, **kwargs):
-    if instance.pk:
-        pre_edit = Transaction.objects.get(pk=instance.pk)
-
-        if pre_edit.amount != instance.amount:
-            delta = pre_edit.amount - instance.amount
-            account = instance.account
-            account.balance = account.balance - delta
-            account.save()
-
-
-@receiver(post_save, sender=Transaction)
-def transaction_post_save(sender, instance: Transaction, created, **kwargs):
-    if created:
-        instance.account.balance += instance.amount
-        instance.account.save()
-
-
-@receiver(pre_delete, sender=Transaction)
-def transaction_pre_delete(sender, instance: Transaction, **kwargs):
-    instance.account.balance -= instance.amount
-    instance.account.save()