Add field "created_at" to Session model

Author: mjnaderi

qsessions/admin.py

@@ -49,12 +49,13 @@ def delete_selected(modeladmin, request, queryset):
 
 @admin.register(Session)
 class SessionAdmin(admin.ModelAdmin):
-    list_display = ('ip', 'user', 'is_valid', 'expire_date', 'device', 'location')
+    list_display = ('ip', 'user', 'is_valid', 'created_at', 'expire_date', 'device', 'location')
     readonly_fields = ('ip', 'location', 'user', 'user_agent', 'is_valid', 'expire_date',
-                       'updated_at', 'user_agent', 'device', 'session_key', 'session_data_decoded')
+                       'created_at', 'updated_at', 'user_agent', 'device', 'session_key',
+                       'session_data_decoded')
     list_filter = ExpiredFilter, OwnerFilter
-    fields = ('user', 'ip', 'location', 'is_valid', 'expire_date', 'updated_at', 'user_agent',
-              'device', 'session_key', 'session_data_decoded')
+    fields = ('user', 'ip', 'location', 'is_valid', 'created_at', 'updated_at', 'expire_date',
+              'user_agent', 'device', 'session_key', 'session_data_decoded')
     ordering = ('-expire_date', )
     actions = [delete_selected]
 

qsessions/migrations/0001_initial.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# Generated by Django 1.11.2 on 2017-12-19 16:00
+# Generated by Django 1.11.2 on 2018-02-03 11:04
 from __future__ import unicode_literals
 
 from django.conf import settings
@@ -24,6 +24,7 @@ class Migration(migrations.Migration):
                 ('session_data', models.TextField(verbose_name='session data')),
                 ('expire_date', models.DateTimeField(db_index=True, verbose_name='expire date')),
                 ('user_agent', models.CharField(blank=True, max_length=300, null=True)),
+                ('created_at', models.DateTimeField()),
                 ('updated_at', models.DateTimeField(auto_now=True)),
                 ('ip', models.GenericIPAddressField(blank=True, null=True, verbose_name='IP')),
                 ('user', models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),

qsessions/models.py

@@ -1,5 +1,6 @@
 from django.contrib.sessions.base_session import AbstractBaseSession, BaseSessionManager
 from django.utils.translation import ugettext_lazy as _
+from django.utils import timezone
 from django.conf import settings
 from django.db import models
 
@@ -19,7 +20,7 @@ class Session(AbstractBaseSession):
     user = models.ForeignKey(getattr(settings, 'AUTH_USER_MODEL', 'auth.User'),
                              null=True, on_delete=models.CASCADE)
     user_agent = models.CharField(null=True, blank=True, max_length=300)
-    # created_at = models.DateTimeField(null=True, auto_now_add=True)
+    created_at = models.DateTimeField()
     updated_at = models.DateTimeField(auto_now=True)
     ip = models.GenericIPAddressField(null=True, blank=True, verbose_name=_('IP'))
 
@@ -30,6 +31,14 @@ def get_session_store_class(cls):
         from qsessions.backends.cached_db import SessionStore
         return SessionStore
 
+    def save(self, *args, **kwargs):
+        # https://code.djangoproject.com/ticket/17654
+        try:
+            self.created_at = Session.objects.get(pk=self.pk).created_at
+        except Session.DoesNotExist:
+            self.created_at = timezone.now()
+        super(Session, self).save(*args, **kwargs)
+
     def delete(self, *args, **kwargs):
         """
         Delete session from both DB and cache (first DB, then cache)

setup.py

@@ -9,7 +9,7 @@
 
 setup(
     name='django-qsessions',
-    version='0.1.2',
+    version='0.1.3',
     description='Extends Django\'s cached_db session backend',
     long_description=README,
     author='Mohammad Javad Naderi',