6 - Intro to Datetime Module

Author: codingforentrepreneurs

src/analytics/views.py

@@ -20,14 +20,14 @@ def dispatch(self, *args, **kwargs):
 
     def get_context_data(self, *args, **kwargs):
         context = super(SalesView, self).get_context_data(*args, **kwargs)
-        qs = Order.objects.all()
+        qs = Order.objects.all().by_date()
         context['orders'] = qs
-        context['recent_orders'] = qs.recent().not_refunded()[:5]
+        context['recent_orders'] = qs.recent().not_refunded()
         context['recent_orders_data'] = context['recent_orders'].totals_data()
         context['recent_orders_cart_data'] = context['recent_orders'].cart_data()
-        context['shipped_orders'] = qs.recent().not_refunded().by_status(status='shipped')[:1]
+        context['shipped_orders'] = qs.recent().not_refunded().by_status(status='shipped')
         context['shipped_orders_data'] =  context['shipped_orders'].totals_data()
-        context['paid_orders'] = qs.recent().not_refunded().by_status(status='paid')[:4]
+        context['paid_orders'] = qs.recent().not_refunded().by_status(status='paid')
         context['paid_orders_data'] = context['paid_orders'].totals_data()
 
         return context

src/db.sqlite3

@@ -151,7 +151,7 @@
 
 LANGUAGE_CODE = 'en-us'
 
-TIME_ZONE = 'UTC'
+TIME_ZONE = 'America/Los_Angeles' #'UTC'
 
 USE_I18N = True
 

src/ecommerce/settings/local.py

@@ -1,10 +1,63 @@
+
+import datetime 
 import os
 import random
 import string
 
+from django.utils import timezone
 from django.utils.text import slugify
 
 
+
+def get_last_month_data(today):
+    '''
+    Simple method to get the datetime objects for the 
+    start and end of last month. 
+    '''
+    this_month_start = datetime.datetime(today.year, today.month, 1)
+    last_month_end = this_month_start - datetime.timedelta(days=1)
+    last_month_start = datetime.datetime(last_month_end.year, last_month_end.month, 1)
+    return (last_month_start, last_month_end)
+
+
+def get_month_data_range(months_ago=1, include_this_month=False):
+    '''
+    A method that generates a list of dictionaires 
+    that describe any given amout of monthly data.
+    '''
+    today = datetime.datetime.now().today()
+    dates_ = []
+    if include_this_month:
+        # get next month's data with:
+        next_month = today.replace(day=28) + datetime.timedelta(days=4)
+        # use next month's data to get this month's data breakdown
+        start, end = get_last_month_data(next_month)
+        dates_.insert(0, {
+            "start": start.timestamp(),
+            "end": end.timestamp(),
+            "start_json": start.isoformat(),
+            "end": end.timestamp(),
+            "end_json": end.isoformat(),
+            "timesince": 0,
+            "year": start.year,
+            "month": str(start.strftime("%B")),
+            })
+    for x in range(0, months_ago):
+        start, end = get_last_month_data(today)
+        today = start
+        dates_.insert(0, {
+            "start": start.timestamp(),
+            "start_json": start.isoformat(),
+            "end": end.timestamp(),
+            "end_json": end.isoformat(),
+            "timesince": int((datetime.datetime.now() - end).total_seconds()),
+            "year": start.year,
+            "month": str(start.strftime("%B"))
+        })
+    #dates_.reverse()
+    return dates_ 
+
+
 def get_filename(path): #/abc/filename.mp4
     return os.path.basename(path)
 

src/ecommerce/utils.py

@@ -1,10 +1,11 @@
 import math
+import datetime
 from django.conf import settings
 from django.db import models
 from django.db.models import Count, Sum, Avg
 from django.db.models.signals import pre_save, post_save
 from django.core.urlresolvers import reverse
-
+from django.utils import timezone
 
 from addresses.models import Address
 from billing.models import BillingProfile
@@ -23,6 +24,10 @@ class OrderManagerQuerySet(models.query.QuerySet):
     def recent(self):
         return self.order_by("-updated", "-timestamp")
 
+    def by_date(self):
+        now = timezone.now() - datetime.timedelta(days=9)
+        return self.filter(updated__day__gte=now.day)
+
     def totals_data(self):
         return self.aggregate(Sum("total"), Avg("total"))