Fix deprecation warnings for Django 1.11 and Django 2.0.

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

mayan/apps/documents/apps.py

@@ -4,7 +4,7 @@ from datetime import timedelta
 
 from kombu import Exchange, Queue
 
-from django.core.urlresolvers import reverse_lazy
+from django.urls import reverse_lazy
 from django.utils.translation import ugettext_lazy as _
 
 from acls import ModelPermission

mayan/apps/documents/managers.py

@@ -144,7 +144,7 @@ class PassthroughManager(models.Manager):
 
 class RecentDocumentManager(models.Manager):
     def add_document_for_user(self, user, document):
-        if user.is_authenticated():
+        if user.is_authenticated:
             new_recent, created = self.model.objects.get_or_create(
                 user=user, document=document
             )
@@ -160,7 +160,7 @@ class RecentDocumentManager(models.Manager):
     def get_for_user(self, user):
         document_model = apps.get_model('documents', 'document')
 
-        if user.is_authenticated():
+        if user.is_authenticated:
             return document_model.objects.filter(
                 recentdocument__user=user
             ).order_by('-recentdocument__datetime_accessed')

mayan/apps/documents/models.py

@@ -6,8 +6,8 @@ import uuid
 
 from django.conf import settings
 from django.core.files import File
-from django.core.urlresolvers import reverse
 from django.db import models, transaction
+from django.urls import reverse
 from django.utils.encoding import force_text, python_2_unicode_compatible
 from django.utils.timezone import now
 from django.utils.translation import ugettext, ugettext_lazy as _
@@ -150,7 +150,7 @@ class Document(models.Model):
 
     uuid = models.UUIDField(default=uuid.uuid4, editable=False)
     document_type = models.ForeignKey(
-        DocumentType, related_name='documents',
+        DocumentType, on_delete=models.CASCADE, related_name='documents',
         verbose_name=_('Document type')
     )
     label = models.CharField(
@@ -363,7 +363,8 @@ class DocumentVersion(models.Model):
         cls._post_save_hooks[order] = func
 
     document = models.ForeignKey(
-        Document, related_name='versions', verbose_name=_('Document')
+        Document, on_delete=models.CASCADE, related_name='versions',
+        verbose_name=_('Document')
     )
     timestamp = models.DateTimeField(
         auto_now_add=True, db_index=True, verbose_name=_('Timestamp')
@@ -648,7 +649,7 @@ class DocumentTypeFilename(models.Model):
     quick rename functionality
     """
     document_type = models.ForeignKey(
-        DocumentType, related_name='filenames',
+        DocumentType, on_delete=models.CASCADE, related_name='filenames',
         verbose_name=_('Document type')
     )
     filename = models.CharField(
@@ -672,7 +673,7 @@ class DocumentPage(models.Model):
     Model that describes a document version page
     """
     document_version = models.ForeignKey(
-        DocumentVersion, related_name='pages',
+        DocumentVersion, on_delete=models.CASCADE, related_name='pages',
         verbose_name=_('Document version')
     )
     page_number = models.PositiveIntegerField(
@@ -845,7 +846,7 @@ class DocumentPage(models.Model):
 
 class DocumentPageCachedImage(models.Model):
     document_page = models.ForeignKey(
-        DocumentPage, related_name='cached_images',
+        DocumentPage, on_delete=models.CASCADE, related_name='cached_images',
         verbose_name=_('Document page')
     )
     filename = models.CharField(max_length=128, verbose_name=_('Filename'))
@@ -874,10 +875,12 @@ class RecentDocument(models.Model):
     a given user
     """
     user = models.ForeignKey(
-        settings.AUTH_USER_MODEL, db_index=True, editable=False, verbose_name=_('User')
+        settings.AUTH_USER_MODEL, db_index=True, editable=False,
+        on_delete=models.CASCADE, verbose_name=_('User')
     )
     document = models.ForeignKey(
-        Document, editable=False, verbose_name=_('Document')
+        Document, editable=False, on_delete=models.CASCADE,
+        verbose_name=_('Document')
     )
     datetime_accessed = models.DateTimeField(
         auto_now=True, db_index=True, verbose_name=_('Accessed')
@@ -901,7 +904,8 @@ class RecentDocument(models.Model):
 @python_2_unicode_compatible
 class DuplicatedDocument(models.Model):
     document = models.ForeignKey(
-        Document, related_name='duplicates', verbose_name=_('Document')
+        Document, on_delete=models.CASCADE, related_name='duplicates',
+        verbose_name=_('Document')
     )
     documents = models.ManyToManyField(
         Document, verbose_name=_('Duplicated documents')

mayan/apps/documents/tests/test_api.py

@@ -7,8 +7,8 @@ import time
 from json import loads
 
 from django.contrib.auth import get_user_model
-from django.core.urlresolvers import reverse
 from django.test import override_settings
+from django.urls import reverse
 from django.utils.encoding import force_text
 
 from django_downloadview import assert_download_response

mayan/apps/documents/tests/test_links.py

@@ -4,7 +4,7 @@ from __future__ import unicode_literals
 
 import time
 
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 
 from acls.models import AccessControlList
 from user_management.tests.literals import (

mayan/apps/documents/views/document_page_views.py

@@ -5,8 +5,8 @@ import urlparse
 
 from django.conf import settings
 from django.contrib import messages
-from django.core.urlresolvers import reverse
 from django.shortcuts import get_object_or_404
+from django.urls import reverse
 from django.utils.http import urlencode
 from django.utils.translation import ugettext_lazy as _
 from django.views.generic import RedirectView

mayan/apps/documents/views/document_type_views.py

@@ -2,8 +2,8 @@ from __future__ import absolute_import, unicode_literals
 
 import logging
 
-from django.core.urlresolvers import reverse, reverse_lazy
 from django.shortcuts import get_object_or_404
+from django.urls import reverse, reverse_lazy
 from django.utils.translation import ugettext_lazy as _
 
 from acls.models import AccessControlList

mayan/apps/documents/views/document_views.py

@@ -4,9 +4,9 @@ import logging
 
 from django.contrib import messages
 from django.core.exceptions import PermissionDenied
-from django.core.urlresolvers import reverse, reverse_lazy
 from django.http import HttpResponseRedirect
 from django.shortcuts import get_object_or_404
+from django.urls import reverse, reverse_lazy
 from django.utils.encoding import force_text
 from django.utils.http import urlencode
 from django.utils.translation import ugettext_lazy as _, ungettext

mayan/apps/documents/widgets.py

@@ -1,7 +1,7 @@
 from __future__ import unicode_literals
 
 from django import forms
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 from django.utils.encoding import force_text
 from django.utils.html import strip_tags
 from django.utils.http import urlencode