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"""
26. Default manipulators
Each model gets an AddManipulator and ChangeManipulator by default.
"""
from django.db import models
class Musician(models.Model):
first_name = models.CharField(maxlength=30)
last_name = models.CharField(maxlength=30)
def __str__(self):
return "%s %s" % (self.first_name, self.last_name)
class Album(models.Model):
name = models.CharField(maxlength=100)
musician = models.ForeignKey(Musician)
release_date = models.DateField(blank=True, null=True)
def __str__(self):
return self.name
__test__ = {'API_TESTS':"""
>>> from django.utils.datastructures import MultiValueDict
# Create a Musician object via the default AddManipulator.
>>> man = Musician.AddManipulator()
>>> data = MultiValueDict({'first_name': ['Ella'], 'last_name': ['Fitzgerald']})
>>> man.get_validation_errors(data)
{}
>>> man.do_html2python(data)
>>> m1 = man.save(data)
# Verify it worked.
>>> Musician.objects.all()
[<Musician: Ella Fitzgerald>]
>>> [m1] == list(Musician.objects.all())
True
# Attempt to add a Musician without a first_name.
>>> man.get_validation_errors(MultiValueDict({'last_name': ['Blakey']}))
{'first_name': ['This field is required.']}
# Attempt to add a Musician without a first_name and last_name.
>>> man.get_validation_errors(MultiValueDict({}))
{'first_name': ['This field is required.'], 'last_name': ['This field is required.']}
# Attempt to create an Album without a name or musician.
>>> man = Album.AddManipulator()
>>> man.get_validation_errors(MultiValueDict({}))
{'musician': ['This field is required.'], 'name': ['This field is required.']}
# Attempt to create an Album with an invalid musician.
>>> man.get_validation_errors(MultiValueDict({'name': ['Sallies Fforth'], 'musician': ['foo']}))
{'musician': ["Select a valid choice; 'foo' is not in ['', '1']."]}
# Attempt to create an Album with an invalid release_date.
>>> man.get_validation_errors(MultiValueDict({'name': ['Sallies Fforth'], 'musician': ['1'], 'release_date': 'today'}))
{'release_date': ['Enter a valid date in YYYY-MM-DD format.']}
# Create an Album without a release_date (because it's optional).
>>> data = MultiValueDict({'name': ['Ella and Basie'], 'musician': ['1']})
>>> man.get_validation_errors(data)
{}
>>> man.do_html2python(data)
>>> a1 = man.save(data)
# Verify it worked.
>>> Album.objects.all()
[<Album: Ella and Basie>]
>>> Album.objects.get().musician
<Musician: Ella Fitzgerald>
# Create an Album with a release_date.
>>> data = MultiValueDict({'name': ['Ultimate Ella'], 'musician': ['1'], 'release_date': ['2005-02-13']})
>>> man.get_validation_errors(data)
{}
>>> man.do_html2python(data)
>>> a2 = man.save(data)
# Verify it worked.
>>> Album.objects.order_by('name')
[<Album: Ella and Basie>, <Album: Ultimate Ella>]
>>> a2 = Album.objects.get(pk=2)
>>> a2
<Album: Ultimate Ella>
>>> a2.release_date
datetime.date(2005, 2, 13)
"""}
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