django-unit-field

a new field inherited from FloatField with a custom widget that allows unit conversion.

Installation

You will need to add unit_field to your INSTALLED_APPS:

INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    # ...
    'unit_field',
)

Abstract

django-unit-field provides a set of Fields for your model. Each field will create three columns in the corresponding database that holds all required informations. These classes are located in unit_field.fields:

* LengthField (base unit: m=1)
* SquareMeasureField (base unit: m²=1)
* SolidMeasureField (base unit: m³=1)
* MassField (base unit: g=1)
* TimeField (base unit: s=1)
* TemperatureField (base unit: K=1)
* AmountOfSubstanceField (base unit: mol=1)
* LuminousIntensityField (base unit: cd=1)

Enhance your models

Example:

from unit_field.fields import SolidMeasureField, TemperatureField

class Engine(models.Model):
    cubic_capacity = SolidMeasureField(
        verbose_name=u'cubic capacity')
    operating_temperature = TemperatureField(
        verbose_name=u'operatiing temperature')

Enable client-side unit conversion

If you want to use client-side unit conversion, you have to include the static javascript file located in the static directory of the app:

<script src="http://ajax.googleapis.com/ajax/libs/jquery/{{jquery-version}}/jquery.min.js"></script>
<script src="{{ STATIC_URL }}js/jquery.unit-field.js"></script>

If you want to exclude some fields from automatic conversion, you can use the additional parameter auto_convert:

class Engine(models.Model):
    ...
    operating_temperature = TemperatureField(auto_convert=False,
        verbose_name=u'operatiing temperature')

Declare custom units

TODO: Describe how to inherit from class UnitField.

kohout / django-unit-field