thirdparty/google_appengine/lib/django/tests/modeltests/choices/models.py
author Daniel Bentley <dbentley@google.com>
Sun, 12 Apr 2009 09:06:45 +0000
branchgae-fetch-limitation-fix
changeset 2313 c39a81bce1bd
parent 109 620f9b141567
permissions -rwxr-xr-x
Use offset_linkid instead of offset to scan >1000 entities. this is a first-cut. It works in all the ways I could make earlier versions fail. It passes link_id as URL parameters. It also has a new class LinkCreator which makes the main body of getListContents even easier to write. I wasn't sure if link_id's could have non alphanumeric characters; if so, they need to be URL encoded/decoded. I also need to go and remove any mention of raw offsets now, because we don't use them. I believe I've talked about this approach with a few of you and it sounded reasonable. Feel free to roll-back/fix/amend/comment-for-me-to-fix. This is my first big-logic-change to Melange. Patch by: Dan Bentley

"""
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(maxlength=20)
    gender = models.CharField(maxlength=1, choices=GENDER_CHOICES)

    def __str__(self):
        return self.name

__test__ = {'API_TESTS':"""
>>> a = Person(name='Adrian', gender='M')
>>> a.save()
>>> s = Person(name='Sara', gender='F')
>>> s.save()
>>> a.gender
'M'
>>> s.gender
'F'
>>> a.get_gender_display()
'Male'
>>> s.get_gender_display()
'Female'
"""}