Task1 and Task2

backend/backend/settings.py

@@ -41,6 +41,7 @@
     "django.contrib.sessions",
     "django.contrib.messages",
     "django.contrib.staticfiles",
+    "django_celery_beat",
     "corsheaders",
     "rest_framework",
     "nested_admin",
@@ -84,13 +85,25 @@
 # Database
 # https://docs.djangoproject.com/en/4.2/ref/settings/#databases
 
-DATABASES = {
+'''DATABASES = {
     "default": {
         "ENGINE": "django.db.backends.sqlite3",
         "NAME": BASE_DIR / "db.sqlite3",
     }
+}'''
+
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.postgresql',
+        'NAME': 'mydatabase',  # Your PostgreSQL database name
+        'USER': 'postgres',  # Your PostgreSQL username
+        'PASSWORD': '1234',  # Your PostgreSQL password
+        'HOST': 'localhost',  # Leave as 'localhost' if PostgreSQL is installed locally
+        'PORT': '5432',  # Default PostgreSQL port
+    }
 }
 
+
 # Password validation
 # https://docs.djangoproject.com/en/4.2/ref/settings/#auth-password-validators
 
@@ -146,6 +159,15 @@
     FRONTEND_URL,
 ]
 
+# Celery Configuration
+CELERY_BROKER_URL = 'redis://localhost:6379/0'
+CELERY_BEAT_SCHEDULE = {
+    'cleanup-old-conversations': {
+        'task': 'chat.tasks.cleanup_old_conversations',
+        'schedule': 86400.0,  # Runs every 24 hours
+    },
+}
+
 SESSION_COOKIE_SECURE = True
 CSRF_COOKIE_SECURE = True
 CSRF_COOKIE_SAMESITE = "None"

backend/chat/admin.py

@@ -51,7 +51,7 @@ def queryset(self, request, queryset):
 class ConversationAdmin(NestedModelAdmin):
     actions = ["undelete_selected", "soft_delete_selected"]
     inlines = [VersionInline]
-    list_display = ("title", "id", "created_at", "modified_at", "deleted_at", "version_count", "is_deleted", "user")
+    list_display = ("title", "id", "created_at", "modified_at", "deleted_at", "version_count", "is_deleted", "user", "summary")
     list_filter = (DeletedListFilter,)
     ordering = ("-modified_at",)
 

backend/chat/management/commands/clean_old_conversations.py

@@ -0,0 +1,16 @@
+from django.core.management.base import BaseCommand
+from django.utils.timezone import now
+from chat.models import Conversation
+import datetime
+
+class Command(BaseCommand):
+    help = "Deletes soft-deleted conversations older than 30 days."
+
+    def handle(self, *args, **kwargs):
+        threshold_date = now() - datetime.timedelta(days=30)
+        old_conversations = Conversation.objects.filter(deleted_at__lte=threshold_date)
+
+        count = old_conversations.count()
+        old_conversations.delete()
+
+        self.stdout.write(self.style.SUCCESS(f"Deleted {count} old conversations."))

backend/chat/migrations/0002_conversation_summary.py

@@ -0,0 +1,17 @@
+# Generated by Django 5.0.2 on 2025-03-13 09:57
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("chat", "0001_initial"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="conversation",
+            name="summary",
+            field=models.TextField(blank=True, null=True),
+        ),
+    ]

backend/chat/models.py

@@ -23,11 +23,26 @@ class Conversation(models.Model):
     deleted_at = models.DateTimeField(null=True, blank=True)
     user = models.ForeignKey(CustomUser, on_delete=models.CASCADE)
 
+    # New field for storing conversation summaries
+    summary = models.TextField(blank=True, null=True)
+
     def __str__(self):
         return self.title
 
     def version_count(self):
         return self.versions.count()
+
+    def generate_summary(self):
+        messages = self.versions.prefetch_related("messages").values_list("messages__content", flat=True)
+        if messages:
+            self.summary = " | ".join(messages[:5])  # Simple summary of first 5 messages
+        else:
+            self.summary = "No messages yet."
+        self.save(update_fields=['summary'])  # Avoids recursive save calls
+
+    def save(self, *args, **kwargs):
+        super().save(*args, **kwargs)
+        self.generate_summary()
 
     version_count.short_description = "Number of versions"
 
@@ -58,8 +73,8 @@ class Meta:
         ordering = ["created_at"]
 
     def save(self, *args, **kwargs):
-        self.version.conversation.save()
         super().save(*args, **kwargs)
+        self.version.conversation.generate_summary()  # Directly update summary when message is saved
 
     def __str__(self):
         return f"{self.role}: {self.content[:20]}..."