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working on resolver404 example code
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‎content/pages/examples/django/django-db-models-positivesmallintegerfield.markdown‎

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@@ -8,7 +8,7 @@ meta: Python code examples for the PositiveSmallIntegerField class used in the D
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[PositiveSmallIntegerField](https://github.com/django/django/blob/master/django/db/models/fields/__init__.py)
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([documentation](https://docs.djangoproject.com/en/dev/ref/models/fields/#django.db.models.PositiveSmallIntegerField))
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([documentation](https://docs.djangoproject.com/en/stable/ref/models/fields/#django.db.models.PositiveSmallIntegerField))
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is a [Django ORM](/django-orm.html) mapping from your Python code to an
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integer-type column in your [relational database](/databases.html)
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that is restricted to only positive values from 0 to 32767.

‎content/pages/examples/django/django-db-models-smallintegerfield.markdown‎

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slug: django-db-models-smallintegerfield-examples
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sortorder: 500012903
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toc: False
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sidebartitle: django.db.models PositiveSmallIntegerField
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meta: Python code examples for the PositiveSmallIntegerField class used in the Django ORM, found within the django.db.models module of the Django project.
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sidebartitle: django.db.models SmallIntegerField
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meta: Python code examples for the SmallIntegerField class used in the Django ORM, found within django.db.models.
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[SmallIntegerField](https://github.com/django/django/blob/master/django/db/models/fields/__init__.py)

‎content/pages/examples/django/django-urls-exceptions-noreversematch.markdown‎

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title: django.urls.exceptions NoReverseMatch Python Code Examples
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category: page
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slug: django-urls-exceptions-noreversematch-examples
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sortorder: 500013610
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sortorder: 500013640
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toc: False
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sidebartitle: django.urls.exceptions NoReverseMatch
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meta: Python example code for the NoReverseMatch exception class from the django.urls.exceptions module.
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[NoReverseMatch](https://docs.djangoproject.com/en/dev/ref/exceptions/#noreversematch)
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([source code](https://github.com/django/django/blob/b9cf764be62e77b4777b3a75ec256f6209a57671/django/urls/exceptions.py))
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[NoReverseMatch](https://docs.djangoproject.com/en/stable/ref/exceptions/#noreversematch)
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([source code](https://github.com/django/django/blob/master/django/urls/exceptions.py))
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is a [Django](/django.html) exception that is raised when a URL
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cannot be matched against any string or regular express in your URL
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configuration.
@@ -103,3 +103,191 @@ def get_current_remote_methods(view):
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return _get_remote_methods_for(view,
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view.request.path_info)
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```
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## Example 2 from AuditLog
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[Auditlog](https://github.com/jjkester/django-auditlog)
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([project documentation](https://django-auditlog.readthedocs.io/en/latest/))
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is a [Django](/django.html) app that logs changes to Python objects,
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similar to the Django admin's logs but with more details and
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output formats. Auditlog's source code is provided as open source under the
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[MIT license](https://github.com/jjkester/django-auditlog/blob/master/LICENSE).
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[**AuditLog / src / auditlog / mixins.py**](https://github.com/jjkester/django-auditlog/blob/master/src/auditlog/mixins.py)
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```python
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import json
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from django.conf import settings
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try:
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from django.core import urlresolvers
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except ImportError:
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from django import urls as urlresolvers
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~~try:
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~~ from django.urls.exceptions import NoReverseMatch
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~~except ImportError:
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~~ from django.core.urlresolvers import NoReverseMatch
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from django.utils.html import format_html
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from django.utils.safestring import mark_safe
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MAX = 75
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class LogEntryAdminMixin(object):
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def created(self, obj):
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return obj.timestamp.strftime('%Y-%m-%d %H:%M:%S')
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created.short_description = 'Created'
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def user_url(self, obj):
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if obj.actor:
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app_label, model = settings.AUTH_USER_MODEL.split('.')
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viewname = 'admin:%s_%s_change' % (app_label, model.lower())
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~~ try:
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~~ link = urlresolvers.reverse(viewname, args=[obj.actor.id])
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~~ except NoReverseMatch:
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~~ return u'%s' % (obj.actor)
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return format_html(u'<a href="{}">{}</a>', link, obj.actor)
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return 'system'
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user_url.short_description = 'User'
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def resource_url(self, obj):
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app_label, model = obj.content_type.app_label, obj.content_type.model
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viewname = 'admin:%s_%s_change' % (app_label, model)
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~~ try:
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~~ args = [obj.object_pk] if obj.object_id is None else [obj.object_id]
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~~ link = urlresolvers.reverse(viewname, args=args)
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~~ except NoReverseMatch:
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~~ return obj.object_repr
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~~ else:
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~~ return format_html(u'<a href="{}">{}</a>', link, obj.object_repr)
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resource_url.short_description = 'Resource'
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def msg_short(self, obj):
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if obj.action == 2:
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return '' # delete
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changes = json.loads(obj.changes)
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s = '' if len(changes) == 1 else 's'
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fields = ', '.join(changes.keys())
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if len(fields) > MAX:
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i = fields.rfind(' ', 0, MAX)
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fields = fields[:i] + ' ..'
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return '%d change%s: %s' % (len(changes), s, fields)
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msg_short.short_description = 'Changes'
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def msg(self, obj):
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if obj.action == 2:
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return '' # delete
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changes = json.loads(obj.changes)
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msg = '<table><tr><th>#</th><th>Field</th><th>From</th><th>To</th></tr>'
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for i, field in enumerate(sorted(changes), 1):
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value = [i, field] + (['***', '***'] if field == 'password' else changes[field])
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msg += format_html('<tr><td>{}</td><td>{}</td><td>{}</td><td>{}</td></tr>', *value)
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msg += '</table>'
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return mark_safe(msg)
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msg.short_description = 'Changes'
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```
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## Example 3 from django-filer
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[django-filer](https://github.com/divio/django-filer)
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([project documentation](https://django-filer.readthedocs.io/en/latest/))
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is a file management library for uploading and organizing files and images
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in Django's admin interface. The project's code is available under the
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[BSD 3-Clause "New" or "Revised" open source license](https://github.com/divio/django-filer/blob/develop/LICENSE.txt).
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[**django-filer / filer / models / filemodels.py**](https://github.com/divio/django-filer/blob/develop/filer/models/filemodels.py)
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```python
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# -*- coding: utf-8 -*-
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from __future__ import absolute_import, unicode_literals
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import hashlib
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import os
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from datetime import datetime
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from django.conf import settings
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from django.core.files.base import ContentFile
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from django.db import models
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~~from django.urls import NoReverseMatch, reverse
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from django.utils import timezone
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from django.utils.encoding import python_2_unicode_compatible
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from django.utils.translation import ugettext_lazy as _
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from .. import settings as filer_settings
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from ..fields.multistorage_file import MultiStorageFileField
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from . import mixins
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from .foldermodels import Folder
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try:
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from polymorphic.models import PolymorphicModel
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from polymorphic.managers import PolymorphicManager
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except ImportError:
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# django-polymorphic < 0.8
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from polymorphic import PolymorphicModel, PolymorphicManager
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class FileManager(PolymorphicManager):
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def find_all_duplicates(self):
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r = {}
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for file_obj in self.all():
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if file_obj.sha1:
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q = self.filter(sha1=file_obj.sha1)
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if len(q) > 1:
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r[file_obj.sha1] = q
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return r
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def find_duplicates(self, file_obj):
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return [i for i in self.exclude(pk=file_obj.pk).filter(sha1=file_obj.sha1)]
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def is_public_default():
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# not using this setting directly as `is_public` default value
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# so that Django doesn't generate new migrations upon setting change
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return filer_settings.FILER_IS_PUBLIC_DEFAULT
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@python_2_unicode_compatible
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class File(PolymorphicModel, mixins.IconsMixin):
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file_type = 'File'
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_icon = "file"
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_file_data_changed_hint = None
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folder = models.ForeignKey(
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Folder,
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verbose_name=_('folder'),
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related_name='all_files',
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null=True,
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blank=True,
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on_delete=models.CASCADE,
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)
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file = MultiStorageFileField(_('file'), null=True, blank=True, max_length=255)
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_file_size = models.BigIntegerField(_('file size'), null=True, blank=True)
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sha1 = models.CharField(_('sha1'), max_length=40, blank=True, default='')
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has_all_mandatory_data = models.BooleanField(_('has all mandatory data'), default=False, editable=False)
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## ... source file abbreviated to get to the examples ...
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@property
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def canonical_url(self):
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url = ''
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~~ if self.file and self.is_public:
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~~ try:
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~~ url = reverse('canonical', kwargs={
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~~ 'uploaded_at': self.canonical_time,
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~~ 'file_id': self.id
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~~ })
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~~ except NoReverseMatch:
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~~ pass # No canonical url, return empty string
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return url
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## ... source file continues with no further relevant examples ...
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```

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