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  • Committer: Holger Rapp
  • Date: 2009-02-19 15:31:42 UTC
  • Revision ID: sirver@h566336-20090219153142-dc8xuabldnw5t395
Initial commit of new widelands homepage

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wl_utils.py
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def get_real_ip(request):
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    """Returns the real user IP, even if behind a proxy."""
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    for key in ('HTTP_X_FORWARDED_FOR', 'REMOTE_ADDR'):
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        if key in request.META:
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            return request.META[key]
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    # No match -> Return a fictional IP to have the model fields not empty
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    return '192.168.255.255'
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# AutoOneToOneField
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# =================
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# Initial implemenation details about AutoOneToOneField:
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#   http://softwaremaniacs.org/blog/2007/03/07/auto-one-to-one-field/
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#
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from django.db.models.fields.related_descriptors import ReverseOneToOneDescriptor
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from django.db.models import OneToOneField
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from django.db import models
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class AutoReverseOneToOneDescriptor(ReverseOneToOneDescriptor):
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    """The descriptor that handles the object creation for an
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    AutoOneToOneField."""
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    def __get__(self, instance, instance_type=None):
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        model = getattr(self.related, 'related_model', self.related.model)
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        try:
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            return (super(AutoReverseOneToOneDescriptor, self)
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                    .__get__(instance, instance_type))
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        except model.DoesNotExist:
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            obj = model(**{self.related.field.name: instance})
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            obj.save()
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            # Don't return obj directly, otherwise it won't be added
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            # to Django's cache, and the first 2 calls to obj.relobj
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            # will return 2 different in-memory objects
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            return (super(AutoReverseOneToOneDescriptor, self)
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                    .__get__(instance, instance_type))
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class AutoOneToOneField(OneToOneField):
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    """OneToOneField creates dependent object on first request from parent
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    object if dependent oject has not created yet."""
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    def contribute_to_related_class(self, cls, related):
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        setattr(cls, related.get_accessor_name(),
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                AutoReverseOneToOneDescriptor(related))