Changelog¶

All notable changes to traverse are documented in this file.

The format follows Keep a Changelog. traverse uses Semantic Versioning.

[0.4.0] - Phase C: Production Readiness¶

Lambda filter DSL (lambda_filter.go) - type-safe filter builder with query.Field().Gt(), query.And(), query.Any(), query.All() and full OData function support
Deep insert (deep_insert.go) - create an entity and its related entities in a single POST, following the OData deep insert specification
Conditional headers (conditional_headers.go) - typed IfMatch, IfNoneMatch, IfModifiedSince, IfUnmodifiedSince request modifiers with ETag type
Stream property support (stream_property.go) - read, write, and delete OData stream properties; multipart chunked upload with progress callback

traverse-gen CLI (cmd/traverse-gen/) - reads EDMX metadata and generates typed Go client, entity structs, query builders, and enum types
EDMX parser supporting OData v2 and v4 metadata documents
PascalCase normalisation for entity and property names
--include / --exclude flags for selective generation
--nullable flag for pointer vs value types on nullable properties

Entity change tracking (change_tracking.go) - ChangeSet[T] records mutations to tracked entities and submits them as an atomic $batch request
Deep expand (deep_expand.go) - nested $expand with per-level $select, $filter, $orderby, $top options (OData v4)
Async operation poller (async_op.go) - AsyncPoller[T] polls 202 Accepted / Location responses with configurable interval, progress callbacks, and timeout

ETag upsert (etag_upsert.go) - upsert entity with If-Match: * or If-None-Match: * semantics for atomic create-or-replace
Typed paginator (paginator.go) - Paginator[T] supports @odata.nextLink, $skiptoken, and $top/$skip pagination strategies
$apply aggregation - CollectionBuilder.Apply() for server-side group-by and aggregate expressions

Declarative OData query builder ($filter, $select, $expand, $orderby, $top, $skip, $count, $format)
CRUD operations: List, Get, Create, Update, Replace, Delete
OData v2 and v4 support with auto-detection
JSON and ATOM response parsing
Built on relay for all transport-level concerns (retries, timeouts, circuit breaker)
Typed error types with OData error code and details