add rules package, create rule for is_job_poster

ipv6work/settings.py

@@ -48,6 +48,9 @@ INSTALLED_APPS += [
     # before 'django.contrib.admin' app
     'dal',
     'dal_select2',
+
+    # for authorization
+    'rules',
 ]
 
 # Our apps
@@ -115,6 +118,10 @@ AUTH_PASSWORD_VALIDATORS = [
     },
 ]
 
+AUTHENTICATION_BACKENDS = (
+    'rules.permissions.ObjectPermissionBackend',
+    'django.contrib.auth.backends.ModelBackend',
+)
 
 # Internationalization
 # https://docs.djangoproject.com/en/2.1/topics/i18n/

jobs/rules.py

+import rules
+
+@rules.predicate
+def is_job_poster(user, job):
+    return job.posted_by == user
+
+
+rules.add_perm('jobs.change_job', is_job_poster)

requirements.txt

 Django==2.1.2
 django-crispy-forms==1.7.2
 git+https://github.com/yourlabs/django-autocomplete-light.git#egg=django-autocomplete-light
+rules==2.0