196 lines
4.9 KiB
Python
196 lines
4.9 KiB
Python
import forms
|
|
|
|
from django.db import models
|
|
from django.db.models import Q
|
|
from django.db.models import Sum
|
|
from django.db.models import Case, When, Value
|
|
from django.shortcuts import render
|
|
from functools import wraps
|
|
|
|
from models import commerce
|
|
from models import inventory
|
|
|
|
|
|
'''
|
|
|
|
All reports must be viewable by staff only (permissions?)
|
|
|
|
Reports can have:
|
|
|
|
A form
|
|
* Reports are all *gettable* - you can save a URL and get back to the same
|
|
report
|
|
* Fetching a report *cannot* break the underlying data.
|
|
A table
|
|
* Headings
|
|
* Data lines
|
|
* Formats are pluggable
|
|
|
|
'''
|
|
|
|
|
|
class Report(object):
|
|
|
|
def __init__(self, title, form, headings, data):
|
|
self._title = title
|
|
self._form = form
|
|
self._headings = headings
|
|
self._data = data
|
|
|
|
@property
|
|
def title(self):
|
|
''' Returns the form. '''
|
|
return self._title
|
|
|
|
@property
|
|
def form(self):
|
|
''' Returns the form. '''
|
|
return self._form
|
|
|
|
@property
|
|
def headings(self):
|
|
''' Returns the headings for the table. '''
|
|
return self._headings
|
|
|
|
@property
|
|
def data(self):
|
|
''' Returns the data rows for the table. '''
|
|
return self._data
|
|
|
|
|
|
def report(view):
|
|
''' Decorator that converts a report view function into something that
|
|
displays a Report.
|
|
|
|
'''
|
|
|
|
@wraps(view)
|
|
def inner_view(request, *a, **k):
|
|
report = view(request, *a, **k)
|
|
|
|
ctx = {
|
|
"title": report.title,
|
|
"form": report.form,
|
|
"report": report,
|
|
}
|
|
|
|
return render(request, "registrasion/report.html", ctx)
|
|
|
|
return inner_view
|
|
|
|
|
|
@report
|
|
def items_sold(request):
|
|
''' Summarises the items sold and discounts granted for a given set of
|
|
products, or products from categories. '''
|
|
|
|
title = "Paid items"
|
|
|
|
form = forms.ProductAndCategoryForm(request.GET)
|
|
|
|
data = None
|
|
headings = None
|
|
|
|
if form.is_valid() and form.has_changed():
|
|
products = form.cleaned_data["product"]
|
|
categories = form.cleaned_data["category"]
|
|
|
|
line_items = commerce.LineItem.objects.filter(
|
|
Q(product__in=products) | Q(product__category__in=categories),
|
|
invoice__status=commerce.Invoice.STATUS_PAID,
|
|
).select_related("invoice")
|
|
|
|
line_items = line_items.order_by(
|
|
# sqlite requires an order_by for .values() to work
|
|
"-price", "description",
|
|
).values(
|
|
"price", "description",
|
|
).annotate(
|
|
total_quantity=Sum("quantity"),
|
|
)
|
|
|
|
print line_items
|
|
|
|
headings = ["Description", "Quantity", "Price", "Total"]
|
|
|
|
data = []
|
|
total_income = 0
|
|
for line in line_items:
|
|
cost = line["total_quantity"] * line["price"]
|
|
data.append([
|
|
line["description"], line["total_quantity"],
|
|
line["price"], cost,
|
|
])
|
|
total_income += cost
|
|
|
|
data.append([
|
|
"(TOTAL)", "--", "--", total_income,
|
|
])
|
|
|
|
return Report(title, form, headings, data)
|
|
|
|
|
|
@report
|
|
def inventory(request):
|
|
''' Summarises the inventory status of the given items, grouping by
|
|
invoice status. '''
|
|
|
|
title = "Inventory"
|
|
|
|
form = forms.ProductAndCategoryForm(request.GET)
|
|
|
|
data = None
|
|
headings = None
|
|
|
|
if form.is_valid() and form.has_changed():
|
|
products = form.cleaned_data["product"]
|
|
categories = form.cleaned_data["category"]
|
|
|
|
items = commerce.ProductItem.objects.filter(
|
|
Q(product__in=products) | Q(product__category__in=categories),
|
|
).select_related("cart", "product")
|
|
|
|
# TODO annotate with whether the item is reserved or not.
|
|
|
|
items = items.annotate(is_reserved=Case(
|
|
When(cart__in=commerce.Cart.reserved_carts(), then=Value(1)),
|
|
default=Value(0),
|
|
output_field=models.BooleanField(),
|
|
))
|
|
|
|
items = items.order_by(
|
|
"cart__status",
|
|
"product__category__order",
|
|
"product__order",
|
|
).values(
|
|
"product",
|
|
"product__category__name",
|
|
"product__name",
|
|
"cart__status",
|
|
"is_reserved",
|
|
).annotate(
|
|
total_quantity=Sum("quantity"),
|
|
)
|
|
|
|
headings = ["Product", "Status", "Quantity"]
|
|
data = []
|
|
|
|
def status(reserved, status):
|
|
r = "Reserved" if reserved else "Unreserved"
|
|
s = "".join(
|
|
"%s" % i[1]
|
|
for i in commerce.Cart.STATUS_TYPES if i[0]==status
|
|
)
|
|
return "%s - %s" % (r, s)
|
|
|
|
for item in items:
|
|
print commerce.Cart.STATUS_TYPES
|
|
data.append([
|
|
"%s - %s" % (
|
|
item["product__category__name"], item["product__name"]
|
|
),
|
|
status(item["is_reserved"], item["cart__status"]),
|
|
item["total_quantity"],
|
|
])
|
|
|
|
return Report(title, form, headings, data)
|