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import calendar
import datetime
from django.db import models
from django.db.models import Sum
from django.urls import reverse
from django.utils import timezone
class LuxSource(models.Model):
name = models.CharField(max_length=200)
date_recorded = models.DateTimeField(auto_now_add=True)
def __str__(self):
return self.name
class LuxSpendingCategory(models.Model):
name = models.CharField(max_length=200)
date_recorded = models.DateTimeField(auto_now_add=True)
def __str__(self):
return self.name
class LuxFixedMonthly(models.Model):
name = models.CharField(max_length=200)
source = models.ForeignKey(LuxSource, on_delete=models.CASCADE)
category = models.ForeignKey(LuxSpendingCategory, on_delete=models.CASCADE)
date_recorded = models.DateTimeField(auto_now_add=True)
def __str__(self):
return self.name
class LuxPurchaseStatsManager(models.Manager):
def get_monthly_spending(self, month=timezone.now().month):
last_day = calendar.monthrange(timezone.now().year, month)[1]
start_date = datetime.date(timezone.now().year, month, 1)
end_date = datetime.date(timezone.now().year, month, last_day)
return self.filter(date_recorded__range=(start_date, end_date)).aggregate(Sum('amount'))
def get_monthly_spending_by_category(self, cat, number_of_months=1):
cat = LuxSpendingCategory.objects.get(name=cat)
today = timezone.now()
month = today.replace(day=1).month
start_month = month - number_of_months + 1
start_date = datetime.date(timezone.now().year, start_month, 1)
last_day = calendar.monthrange(timezone.now().year, month)[1]
end_date = datetime.date(timezone.now().year, month, last_day)
return self.filter(date_recorded__range=(start_date, end_date)).filter(category=cat).aggregate(Sum('amount'))
class LuxPurchase(models.Model):
amount = models.DecimalField(max_digits=6, decimal_places=2)
source = models.ForeignKey(LuxSource, on_delete=models.CASCADE)
category = models.ForeignKey(LuxSpendingCategory, null=True, on_delete=models.CASCADE)
date_recorded = models.DateTimeField(auto_now_add=True)
class Meta:
ordering = ('-date_recorded',)
def __str__(self):
return "%s - %s" %(self.amount, self.source.name)
def get_absolute_url(self):
return reverse("luxbudget:detail", kwargs={"pk": self.pk})
objects = models.Manager() # The default manager.
stats = LuxPurchaseStatsManager()
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