1. Michael P. Jung
  2. django-composite-field



CompositeField for Django Models

This is an implementation of a CompositeField for Django. Composite fields can be used to group fields together and reuse their definitions.


class CoordField(CompositeField):
    x = models.FloatField()
    y = models.FloatField()

class Place(models.Model):
    name = models.CharField(max_length=10)
    coord = CoordField()

p = Place(name='Foo', coord_x=42, coord_y=0)
q = Place(name='Foo', coord=p.coord)
q.coord.y = 42

The content of composite fields are stored inside the model, so they do not have to fiddle with any internals of the Django models. For example 'p.coord' returns a proxy object that maps the fields 'x' and 'y' to the model fields 'coord_x' and 'coord_y'. The proxy objekt also makes it possible to assign more than one property at once.

There are some more examples in the included tests.py.