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CompositeField implementation for Django

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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

How does it work?

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

Documentation can be found at RTFD.

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