feat(hadis): return raw translations in sync api and invalidate cache on version update

- Return raw, unlocalized translation list in HadisSyncSerializer for Flutter offline multi-language support
- Enable hadis signals in HadisConfig.ready() to load cache invalidation listeners
- Add ContentRelease to TARGET_MODELS and implement invalidate_hadis_cache helper
- Trigger explicit cache invalidation in AdminContentReleaseViewSet upon version increment and CRUD
- Update HadisSyncView swagger documentation example

apps/hadis/apps.py

@@ -4,6 +4,6 @@ from django.apps import AppConfig
 class HadisConfig(AppConfig):
     default_auto_field = 'django.db.models.BigAutoField'
     name = 'apps.hadis'
-    # def ready(self):
-    #     # Import the signals module when the app starts
-    #     # import apps.hadis.signals
+    def ready(self):
+        # Import the signals module when the app starts
+        import apps.hadis.signals

apps/hadis/docs.py

@@ -249,7 +249,12 @@ hadis_sync_swagger = swagger_auto_schema(
                             "title": "The Merit of Seeking Knowledge",
                             "title_narrator": "Jabir bin Abdullah",
                             "text": "اتَّقِ اللَّهَ حَيْثُمَا كُنْتَ، وَأَتْبِعِ السَّيِّئَةَ الْحَسَنَةَ تَمْحُهَا.",
-                            "translation": "The best among you are those who have the best manners and character.",
+                            "translation": [
+                                {
+                                    "language_code": "en",
+                                    "text": "The best among you are those who have the best manners and character."
+                                }
+                            ],
                             "detail": {
                                 "address": [
                                     "Sahih al-Bukhari",

apps/hadis/serializers/hadis.py

@@ -92,7 +92,7 @@ class HadisSyncSerializer(serializers.ModelSerializer):
     interpretations = serializers.SerializerMethodField()
     title = LocalizedField()
     title_narrator = LocalizedField()
-    translation = LocalizedField()
+    translation = serializers.SerializerMethodField()
 
     class Meta:
         model = Hadis
@@ -103,6 +103,9 @@ class HadisSyncSerializer(serializers.ModelSerializer):
             'detail', 'narrators', 'explanations', 'corrections', 'interpretations'
         ]
 
+    def get_translation(self, obj):
+        return obj.translation or []
+
     def get_detail(self, obj):
         request = self.context.get('request')
 

apps/hadis/signals.py

@@ -8,10 +8,30 @@ from .models import *
 # 1. Define all models that affect the list
 # If a Category title changes, the list must update.
 # If a Status changes, the list must update.
-TARGET_MODELS = [Hadis , HadisCategory , HadisCollection , HadisCorrection , HadisInCollection , HadisReference ,
+TARGET_MODELS = [
+    Hadis, HadisCategory, HadisCollection, HadisCorrection, HadisInCollection, HadisReference,
     HadisSect, HadisStatus, HadisTag, HadisTransmitter, Transmitters, TransmitterOpinion, TransmitterReliability,
     TransmitterOriginalText, ReferenceImage, BookReference, BookAttribute, BookAuthor, BookReferenceImage,
-    NarratorLayer , OpinionStatus ]
+    NarratorLayer, OpinionStatus, ContentRelease
+]
+
+
+def invalidate_hadis_cache():
+    """
+    Deletes all Redis cache keys matching '*hadis_api*'.
+    Falls back to cache.clear() if cache backend doesn't support delete_pattern.
+    """
+    try:
+        if hasattr(cache, 'delete_pattern'):
+            deleted = cache.delete_pattern("*hadis_api*")
+            print(f"Cache cleared for hadis_api (deleted {deleted} keys)!")
+        else:
+            cache.clear()
+            print("Cache cleared for hadis_api (fallback clear)!")
+    except Exception as e:
+        # Fail silently or log error, don't crash the transaction
+        print(f"Cache clear failed: {e}")
+
 
 @receiver(post_save)
 @receiver(post_delete)
@@ -20,14 +40,5 @@ def clear_hadis_cache(sender, instance, **kwargs):
     Clears the API cache whenever a Hadith or related model is saved/deleted.
     """
     if sender in TARGET_MODELS:
-        # This is the magic command from django-redis
-        # It finds ALL keys starting with the prefix and deletes them
-        # *:1: is the default django version prefix
-        try:
-            # Delete any key that contains our prefix "hadis_api"
-            # The pattern "*hadis_api*" ensures we catch all variations (headers, pages, etc)
-            cache.delete_pattern("*hadis_api*")
+        invalidate_hadis_cache()
         print(f"Cache cleared for {sender.__name__} update!")
-        except Exception as e:
-            # Fail silently or log error, don't crash the save transaction
-            print(f"Cache clear failed: {e}")

apps/hadis/views_admin.py

@@ -968,6 +968,9 @@ class AdminContentReleaseViewSet(ModelViewSet):
             is_active=True
         )
 
+        from .signals import invalidate_hadis_cache
+        invalidate_hadis_cache()
+
         return Response({
             "status": "success",
             "message": f"Version incremented to {version_name}",
@@ -975,3 +978,19 @@ class AdminContentReleaseViewSet(ModelViewSet):
             "next_suggested_version": compute_next_version(version_name)
         })
 
+    def perform_create(self, serializer):
+        super().perform_create(serializer)
+        from .signals import invalidate_hadis_cache
+        invalidate_hadis_cache()
+
+    def perform_update(self, serializer):
+        super().perform_update(serializer)
+        from .signals import invalidate_hadis_cache
+        invalidate_hadis_cache()
+
+    def perform_destroy(self, instance):
+        super().perform_destroy(instance)
+        from .signals import invalidate_hadis_cache
+        invalidate_hadis_cache()
+
+