- Add City model and connect origin_city, lived_in_city, and died_in_city to Transmitters and BookAuthors
- Connect city_of_publication_city to BookEdition
- Add Kunya model and connect many-to-many kunyas relation to Transmitters
- Implement DovodiCityViewSet and DovodiKunyaViewSet and register routes in admin router
- Add migrations 0057, 0058, and 0059 to create tables and migrate existing string/JSON data
- Convert birth_year_hijri and death_year_hijri to CharField and add age_at_death
- Introduce BookAuthorDate model linking BookAuthor with parsed YearValue records
- Add sync_author_dates and date formatting methods to BookAuthor
- Support century filtering via YearValue min/max ranges and prefetch author dates
- Expose live preview fields and canonical date validation in AdminBookAuthorSerializer
- Add migration 0056 to convert fields and populate BookAuthorDate records
- Add date_engine utility for parsing exact, range, circa, before, after, and #context dates
- Introduce YearValue and NarratorDate models to index and translate narrator dates
- Add description field to OpinionStatus and TransmitterReliability models
- Register DovodiYearValueViewSet and DovodiBookAuthorRutbaViewSet admin endpoints
- Add parse-preview action for validating and translating date inputs
- Add migration 0055 to populate YearValue and NarratorDate from existing transmitters
- Introduce BookAuthorRutba model with title, slug, color, and description
- Link BookAuthor to BookAuthorRutba via rutba_status foreign key
- Update reference admin to manage BookAuthorRutba and assign rutba status
- Include rutba_detail in BookAuthorDetailSerializer and BookAuthorSyncSerializer
- Add migration 0054 to seed rutba records from existing authors
- Create ScholarlyOpinion model for standalone reusable scholarly opinions with status and multilingual text
- Add foreign key link from TransmitterOpinion to ScholarlyOpinion with automatic backward sync
- Create data migration 0053 to populate ScholarlyOpinion records from existing transmitter opinions
- Expose DovodiScholarlyOpinionViewSet and register route /dovodi-opinions/ in admin router
- Update TransmitterOpinion serializers and views to prioritize linked ScholarlyOpinion data
- Add bulk-assign-topics endpoint to AdminHadisViewSet supporting add/replace modes
- Validate leaf topic constraints and handle both M2M categories and primary category_id
- Invalidate hadis cache on bulk updates and return updated count with category details
- Expand AdminHadisBriefSerializer with slug, title_narrator, and status fields
- Update annotate_and_prune_empty_categories helper to count active content from both category and categories relations in subtree
- Check both category and categories in category serializers (get_has_hadis, get_hadis_count, get_children_count)
- Support categories M2M relation in HadisSyncView and HadisMainListView filters
- Remove aggressive cached_view decorator from category tree and listing routes to ensure real-time consistency
- Add GenderChoices (male/female) field to Transmitters model with migration 0052
- Include gender across public and admin transmitter serializers
- Expose gender in TransmittersAdmin filter and list display
- Propagate transmitter gender in HadisCategoryXMindView flowchart payload
- Add split_transmitters_gender management command
- Add is_topic boolean field to HadisCategory model with indexing
- Enforce validation rules in clean():
* Topics cannot have children and must define a source_type
* Structural categories cannot contain hadiths and have source_type=None
* Parents cannot be topics
* Hadiths can only be attached to topics (is_topic=True)
- Update admin serializers and views to support is_topic filtering and mapping
- Expose is_topic in public category serializers (SimpleCategory, HadisCategorySelectSerializer, CategorySerializer)
- Include migration 0051_add_category_is_topic
- Refactor QuranSecondaryTranslation to store language_code, translation_text and translator per record
- Add migrations 0042 and 0043 to migrate existing secondary translations
- Update AdminCategoryQuranVerseSerializer and AdminHadisCategorySerializer with proper secondary translations handling
- Support category filtering by source_type, has_quran_verse and exclude_verse_id in admin category viewset
- Optimize HadisSyncSerializer: remove unused number, address_details, and book descriptions
- Separate sync serializers for corrections and interpretations (omitting redundant hadis_info and category_info)
- Add HadisDatabaseVersion model and migration for tracking offline SQLite DB
- Add export_hadis_sqlite management command with gzip compression and single-file overwrite
- Add GET /api/hadis/sync/database/ endpoint and enhance version serializers
- Automatically trigger background SQLite database export on version increment in admin
- Add request-level user bookmark memoization in BookmarkStatusSerializer to eliminate redundant queries across all lists
- Optimize BookReferenceSyncView and BookReference.authors caching (reduced queries from 185 to 10)
- Add multi-level prefetch_related for references and images in HadisMainListView (reduced queries from 109 to 6)
- Add incremental sync support (updated_after/since) in HadisSyncView
- Add select_related for language in BookListView (reduced queries from 35 to 18)
- Annotate episode count and cache effective_thumbnail in podcast and video playlist views (reduced queries from 22/17 to 4)
- Prefetch categories with annotated article counts in ArticleListAPIView (reduced queries from 41 to 3)
- Scale Gunicorn workers/threads to 4w/4t (16 concurrency) with gthread in docker-compose.prod.yml
- 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
- Eliminate N+1 queries in hadis serializers by using in-memory prefetch cache instead of .first() and .order_by()
- Add select_related for hadis and category in HadisSyncView prefetches
- Apply cached_view (Redis 2h + Accept-Language) to HadisSyncView and public hadis endpoints
- Enable GZipMiddleware in Django settings to compress large API responses
- Create reusable watermark utility in utils/watermark.py supporting PIL, UploadedFile, bytes, and DRF serializer fields
- Default position set to bottom-left with responsive 32% width scaling and alpha blending
- Auto-resolve SVG watermark to high-resolution PNG
- Integrate automatic watermarking into Article thumbnails, Hadith/Book Reference images, Corrections, Original Texts, and Interpretations
- auto-extract YouTube duration and thumbnail on Video save using yt-dlp
- filter out empty playlists and playlists with inactive items in video and podcast public/app views
- dynamically calculate number_of_volumes for BookEditionV2 based on assigned volumes
H.shokhmgar86