Hi Maurice, its very hard understood this but i give a try. if your are working in finance-world you will need update de balance, so it implies fields 'depends' from others transactions, you named deposits/withdraws.
You can use aggregations[1] or update field 'manually'. Regards, [1] https://docs.djangoproject.com/en/1.6/topics/db/aggregation/ On Thu, Oct 3, 2013 at 2:09 AM, MAurice <mjose...@gmail.com> wrote: > Hello everyone was requesting for help on this micro-finance software am > developing, needed to make the account balance reflect updated > amount/value on the database when deposits/withdraws are made on either the > account or loan repayment > > *class Branch(models.Model):* > time_stamp =models.DateTimeField(default=datetime.datetime.now(), > editable=False) > name =models.CharField(max_length=200) > physical_location=models.CharField(max_length=200) > email =models.EmailField() > > *class Account(models.Model):* > account_type =models.CharField(max_length=200, choices=ACCTYPE) > branch =models.ForeignKey('Branch') > first_name =models.CharField(max_length=200) > last_name =models.CharField(max_length=200) > account_number =models.SlugField(unique=True) > account_current_balance =models.FloatField(max_length=255,default=0) > * > class Account_holder(models.Model):* > id =models.IntegerField(primary_key=True,default=1) > account_id =models.ManyToManyField(Account) > > > * > > class Loan(models.Model):* > id = models.AutoField(primary_key=True,default=1) > branch_cod =models.IntegerField(blank=True, null=True) > time_years =models.DecimalField(default=1.0, max_digits=10, > decimal_places=4) > loan_number =models.SlugField(unique=True) > account_name =models.ForeignKey(Account) > loan_amount =models.DecimalField(default=0.0, max_digits=10, > decimal_places=2) > interest_rate =models.DecimalField(default=0.0, max_digits=10, > decimal_places=2) > interest_charged = models.DecimalField(default=0.0, max_digits=10, > decimal_places=2, editable=False) > required_payement = models.DecimalField(default=1.0, max_digits=10, > decimal_places=2) > * > class statement(models.Model):* > account_id =models.ForeignKey(Account) > date = models.DateTimeField(default=datetime.datetime.now(), > editable=False) > deposit = models.PositiveIntegerField(null=True, default=0) > withdraw = models.PositiveIntegerField(null=True, default=0) > description =models.TextField(max_length=200) > current_balance = models.FloatField(max_length=200, editable=False) > > def save(self, *args, **kwargs): > self.current_balance = self.account_id.average_balance + > self.credit - self.debit > self.average_balance = self.account_id.average_balance + > self.credit - self.debit -self.minimum_balance > super(statement,self).save(*args, **kwargs) > * > class Savant_user(models.Model):* > user =models.OneToOneField(User) > branch =models.ManyToManyField('Branch') > > > > def create_Dashboard_user_callback(sender, instance, **kwargs): > Dashboard, new = Savant_user.objects.get_or_create(user=instance) > post_save.connect(create_Dashboard_user_callback, User) > > -- > You received this message because you are subscribed to the Google Groups > "Django users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to django-users+unsubscr...@googlegroups.com. > To post to this group, send email to django-users@googlegroups.com. > Visit this group at http://groups.google.com/group/django-users. > To view this discussion on the web visit > https://groups.google.com/d/msgid/django-users/585a5845-9111-492d-a0c9-10342ee2bfbc%40googlegroups.com > . > For more options, visit https://groups.google.com/groups/opt_out. > -- Cristian Salamea @ovnicraft -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscr...@googlegroups.com. To post to this group, send email to django-users@googlegroups.com. Visit this group at http://groups.google.com/group/django-users. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/CA%2B16coMPWmHCaAkL6o9JbnazdC_8NSr7S-AipAbpAVTyzgKHOw%40mail.gmail.com. For more options, visit https://groups.google.com/groups/opt_out.
