codingjoe/django-measurement

Easily store, retrieve, and convert measurements of weight, volume, distance, area and more.

Easily use, manipulate, and store unit-aware measurement objects using Python and Django.

Note: Version 2.0 has no backward compatibility due to major design changes.

django.contrib.gis.measure has these wonderful 'Distance' objects that can be used not only for storing a unit-aware distance measurement, but also for converting between different units and adding/subtracting these objects from one another.

This module provides for a django model field and admin interface for storing any measurements provided by python-measurement.

Example use with a model:

from django_measurement.models import MeasurementField
from django_measurement.measure import Volume
from django.db import models

class BeerConsumptionLogEntry(models.Model):
    name = models.CharField(max_length=255)
    volume = MeasurementField(Volume)

    def __unicode__(self):
        return u"%s of %s" % (self.name, self.volume)

entry = BeerConsumptionLogEntry()
entry.name = 'Bear Republic Racer 5'
entry.volume = Volume(us_pint=1)
entry.save()

These stored measurement objects can be used in all of the usual ways supported by python-measurement too:

>>> from django_measurement.measures import Weight
>>> weight_1 = Weight(lb=125)
>>> weight_2 = Weight(kg=40)
>>> added_together = weight_1 + weight_2
>>> added_together
Weight(lb=213.184976807)
>>> added_together.kg  # Maybe I actually need this value in kg?
96.699

• Documentation for django-measurement is available an ReadTheDocs.
• Please post issues on Github.
• Test status available on Travis-CI.