django-exclusivebooleanfield
Provides an ExclusiveBooleanField which is a boolean (db) field where only one row in the table (or optionally, a subset of table based on value of other fields) is True and all the other rows are False.
Usage:
from django.db import models
from exclusivebooleanfield.fields import ExclusiveBooleanField
class MyModel(models.Model):
the_one = ExclusiveBooleanField()
class MyModel(models.Model):
field_1 = ForeignKey()
field_2 = CharField()
the_one = ExclusiveBooleanField(on=('field_1', 'field_2'))
# `on` is a bit like a unique constraint, value of field
# is only exclusive for rows with same value of the on fields
class MyOtherModel(models.Model):
field_1 = CharField()
the_one = ExclusiveBooleanField(on='field_1')
# if `on` is just a single field you don't have to wrap in a tupleTested on Django 1.3 thru 1.8, to run tests checkout the project and python setup.py test
