- Author:
- eallik
- Posted:
- November 4, 2010
- Language:
- Python
- Version:
- Not specified
- Score:
- 2 (after 2 ratings)
Enables convenient adding of fields, methods and properties to Django models.
Instead of:
User.add_to_class('foo', models.CharField(...)
User.add_to_class('bar', models.IntegerField(...)
you can write:
class UserMixin(ModelMixin):
model = User
foo = models.CharField(...)
bar = models.IntegerField(...)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 | ##############
# utils.py #
##############
class MixinType(type):
def __new__(cls, name, bases, dct):
ret = type.__new__(cls, name, bases, dct)
if name != 'ModelMixin':
assert 'model' in dct
model = dct.pop('model')
for k, v in dct.iteritems():
if k not in ModelMixin.__dict__:
model.add_to_class(k, v)
return ret
class ModelMixin(object):
__metaclass__ = MixinType
###############
# models.py #
###############
class UserMixin(ModelMixin):
model = User
@property
def foobar(user):
try:
return user.foobar_set.get()
except Foobar.DoesNotExist:
return None
@property
def is_boss(user):
return user.foobar is not None
def __unicode__(user):
try:
profile = user.get_profile()
if profile.full_name:
return profile.full_name
except UserProfile.DoesNotExist:
pass
full_name = (u'%s %s' % (user.first_name, user.last_name)).strip()
if full_name:
return full_name
return user.username
def get_absolute_url(user):
return reverse('localsite_user_detail', kwargs=dict(username=user.username))
|
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