Argument store added to updateEntityProperties.
This argument determines if an entity should be stored in the data model after its properties are updated.
It may be useful, for example, along with tasks (Task Queue API). One may want to make some modifications to an entity during execution of a task, but the developer is sure that at least one new task, which also wants to modify the entity, will be queued, so he or she can just update the entity without saving the changes to the data model, set the entity in memcache and the following task (which is to be executed very shortly) is to retrive the current entity from the memcache (without any expensive calls to the actual data model).
"""
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'
"""}