Merge pull request #8 from TwigWorld/SP-130-django-upgrade-2-2

Upgrade django version to 2.2

setup.py

@@ -9,7 +9,7 @@
     long_description=open('README.md').read(),
     python_requires='>=3.7.0',
     install_requires=[
-        "Django>=1.11.29, <2.0",
+        "Django>=2.2, <3.0",
     ],
     packages=find_packages(),
     include_package_data=True

urlmapper/migrations/0001_initial.py

@@ -20,7 +20,7 @@ class Migration(migrations.Migration):
                 ('object_id', models.PositiveIntegerField(null=True, verbose_name='Object ID', blank=True)),
                 ('view_name', models.CharField(max_length=255, verbose_name='View name', blank=True)),
                 ('view_keywords', models.TextField(help_text='Use a=b to define keywords and commas to separate e.g slug=terms-and-conditions, language=en', verbose_name='View keywords', blank=True)),
-                ('content_type', models.ForeignKey(verbose_name='Content Type', blank=True, to='contenttypes.ContentType', null=True)),
+                ('content_type', models.ForeignKey(on_delete=models.deletion.CASCADE, verbose_name='Content Type', blank=True, to='contenttypes.ContentType', null=True)),
             ],
             options={
                 'verbose_name': 'URL map',

urlmapper/models.py

@@ -2,7 +2,7 @@
 
 from django.contrib.contenttypes.fields import GenericForeignKey
 from django.core.exceptions import ValidationError
-from django.core.urlresolvers import reverse, resolve, NoReverseMatch, Resolver404
+from django.urls import reverse, resolve, NoReverseMatch, Resolver404
 from django.db import models
 from django.utils.translation import ugettext_lazy as _, ugettext
 # django/py3
@@ -70,7 +70,8 @@ class URLMap(models.Model):
         verbose_name=_("Content Type"),
         limit_choices_to=_get_content_type_choices(),
         blank=True,
-        null=True
+        null=True,
+        on_delete=models.CASCADE
     )
     object_id = models.PositiveIntegerField(
         _("Object ID"),