v0.18.0

• Date properties can now be tagged as expiration time; which can be then be easily evicted
• Tree API: various additions and improvements, e.g. OBXTreeOptionFlags to configure the tree behavior
• New query condition to match objects that have a given number of relations
• New "max data size" store setting
• Enabled stricter compiler settings
• Added stacktraces on errors (Linux only; very lightweight as it uses external addr2line or llvm-symbolizer)
• Added log callback for most important logs
• Consolidated "user data" passing as the last parameter
• Various internal improvements

C++

• Added BoxTypeless, QueryBuilderBase and QueryBase:
  these can be used without generated code and template types.
• New APIs to get the schema IDs for entity types and properties
• Added two methods to Store to await asynchronous processing
• Added "internal" namespace so that internal members do not spill into the obx namespace
• Move more implementations to OBX_CPP_FILE

Sync

• Custom protocols for Sync: plugin your own messaging protocol, which ObjectBox Sync will run on
• Improvements to run Sync Server with limited disk space (e.g. on small devices)
• Tree Sync improvements; e.g. consolidate conflicts
• WebSockets (sync protocol) is now a feature, which can be turned off (special build version)
• Performance optimizations

Check changelog for details

v0.17.0

• Added a "weak store" API providing weak reference for stores (typically used by background threads)
• Added Store ID API, e.g. getting a store by its ID
• Various internal improvements including minor optimizations for binary size and performance

C++

• New "OBX_CPP_FILE" define to place declarations in a single .cpp/.cc file: improves compilation time and results
• New "Exception" base class for all thrown exceptions
• Various internal improvements, e.g. a "internal" namespace to better distinguish from userland API

v0.16.0

Allow UTF-8 for database directories on Windows (has been available for other platforms before).

C++

• Promoted Options to a top level class, as nested classes cannot be declared forward
• New #define to disable FlatBuffers includes to simplify new project setup
• Rename Exception to DbException

Check changelog for details

v0.15.2

• Add store cloning
• Fix attaching to a reopened store

See also https://cpp.objectbox.io

v0.15.1

This version fixes non-unique indexes triggering unique constraint violations in corner cases (introduced in 0.15.0)

More details

ObjectBox C and C++ 0.15.0

• New "Flex" data type that can contain data of various types like integers, floating points, strings, lists and maps
• New query conditions for Flex lists to find a specific element
• New query conditions for Flex maps to find elements with a specific key or key/value pair
• New unique on-conflict strategy: replace conflicting objects (OBXPropertyFlags_UNIQUE_ON_CONFLICT_REPLACE)
• New functions to attach to existing stores using only the file path (in the same process)
• New APIs for ObjectBox Admin, the web based UI (formerly known as Object Browser): obx_admin_*
• Minor performance improvements for indexed access
• Major performance improvements for tree/GraphQL queries
• ARM binaries are now built for minimal size reducing the library size significantly
• New "no_reader_thread_locals" store option
• Enable debug logging (requires a special build)
• API: Type for query offsets and limits was changed from uint64_t to size_t
• API: rarely used obx_txn_mark_success() was removed; use obx_txn_success()
• API: feature checks consolidated to only use obx_has_feature()
• Many internal improvements
• Core version 3.0.1-2021-12-09

Sync

• New API for embedded server mode: obx_sync_server_* (implementation available on request)

v0.14.0

• change obx_query_prop_count() to respect case-sensitivity setting when counting distinct strings
• change OBXSyncCredentialsType values to start at 1
• add obx_query_find_first() to get a first object matching the query
• add obx_query_find_unique() to get the only object matching the query
• add obx_async_put_object4() accepting a put_mode
• updated ARMv7hf toolchain, now requires GLIBC v2.28 (e.g. Raspbian 10, Ubuntu 20.04)
• semi-internal Dart APIs: add query streaming and finalizers

v0.13.0

• add Sync binary library variants for all supported platforms
• add MacOS universal binary library, supporting Intel x64 and Apple Silicon arm64
• split Sync symbols out of objectbox.h/pp into objectbox-sync.h/pp
• add Sync server-time getter, listener and local-to-server diff info - to access server time info on clients
• add Sync heartbeat interval configuration and an option to send one immediately
• semi-internal: update Dart/Flutter SDK to v2.0

v0.12.0

• add Linux ARMv8 (aarch64) native binary library
• add obx_sync_* APIs (actual functionality is only available in a sync-enabled version; see https://objectbox.io/sync/)
• add obx_has_feature(), and OBXFeature enum: please use these instead of the following, now deprecated functions:
  obx_supports_bytes_array(), obx_supports_time_series(), and obx_sync_available()
• add obx_remove_db_files() to delete database files in a given directory
• add optional OBXEntityFlags_SHARED_GLOBAL_IDS for SYNC_ENABLED entities
• semi-internal: add custom async callback APIs for Dart/Flutter language binding

v0.11.0

• update CMakeLists.txt to simplify integration for users, e.g. with FetchContent,
  see the updated installation docs
• change cursor and box read functions get/first/current/next void** argument to const void**
• change multiple query and query builder functions int count argument to size_t count
• change observer signatures (obx_err return value and size_t count argument)
• new obx_model_entity_flags()
• new obx_opt_async_*() to configure async box behavior
• new greater-or-equal and less-or-equal query conditions for integers and floats
• new obx_query_offset_limit() setter for offset and limit in a single call
• new obx_sync_available() to check whether the loaded runtime library supports ObjectBox Sync
• clean up linter warnings in the examples and objectbox.h(pp)

C++ (only)

• rename objectbox-cpp.h to objectbox.hpp
• change C++ Store Options to a "builder" pattern and expose all available options
• new C++ AsyncBox and Box::async() to expose asynchronous operations