| """ |
| 21. Specifying 'choices' for a field |
| |
| Most fields take a ``choices`` parameter, which should be a tuple of tuples |
| specifying which are the valid values for that field. |
| |
| For each field that has ``choices``, a model instance gets a |
| ``get_fieldname_display()`` method, where ``fieldname`` is the name of the |
| field. This method returns the "human-readable" value of the field. |
| """ |
| |
| from django.db import models |
| |
| GENDER_CHOICES = ( |
| ('M', 'Male'), |
| ('F', 'Female'), |
| ) |
| |
| class Person(models.Model): |
| name = models.CharField(max_length=20) |
| gender = models.CharField(max_length=1, choices=GENDER_CHOICES) |
| |
| def __unicode__(self): |
| return self.name |
