amirsuhail786

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tmilos

Modified Preorder Tree Traversal

Hierarchical data metrics that allows fast read operations on tree like structures.

Based on Left and Right fields that are set during tree traversal. When entered into node value is set to it's Left, when exiting node value is set to it's Right.

Sample implementation

timmyomahony

from django.contrib.contenttypes.models import ContentType
from django.core.urlresolvers import reverse
from django.db import models

class AdminURLMixin(object):
    def get_admin_url(self):
        content_type = ContentType \
            .objects \
            .get_for_model(self.__class__)
        return reverse("admin:%s_%s_change" % (