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0.10.0

  • New parser for query and rules
  • Added a lot of meaningful error messages and validations to query parser
  • Support for _ (ignore binding) in :in and fn-clause bindings
  • Fixed id allocation bug when nested maps are used for referenced entities (issue #59)
  • Fixed squuids omitting leading zeros (issue #60)
  • Fixed a bug when cross-referencing components caused infinite loop in Pull API (isuue #58, pull request #61)
  • Pull API handles recursion more like Datomic does (issue #62)
  • Exposed DB filter API to js (pull request #65)
  • Added ICounted, ISequable, IEmptyableCollection to datascript.core/DB
  • Force put Datom and DB tag readers to cljs.reader/*tag-table*, do not rely on data_readers.clj

0.9.0

  • Lookup refs can be inlined in query :where patterns (issue #53)
  • Pull API (issue #37, pull request #51) by David Thomas Hume
  • pull form in :find clause

0.8.1

  • :db/unique constraints
  • Upserts
  • Lookup refs
  • entid function

0.8.0

  • Find specifications: collection :find [?e ...], tuple :find [?e ?v], and scalar :find ?e .
  • Support for :db/isComponent (issue #3)
  • Support for nested maps in transact! (also fixes #38)
  • [ BREAKING ] Custom aggregate fns must be called via special syntax (aggregate keyword): (q '[:find (aggregate ?myfn ?e) :in $ ?myfn ...]). Built-in aggregates work as before: (q '[:find (count ?e) ...]
  • Return nil from entity when passed nil eid (issue #47)
  • Transaction data is now validated, with proper error messages (also fixes #48)

0.7.2

  • Fixed a bug with function call after function relation was filtered out (issue #44)

0.7.1

  • Fixed a bug when emtpy coll in input was not creating empty relation

0.7.0

  • BTSet and its slices (returned by datoms/seek-datoms/index-range calls) now support fast reverse iteration via reverse.
  • (datascript/datom e a v & [tx added]) call for creating new datoms
  • Added missing aggregate funs: avg, median, variance, stddev and count-distinct (issue #42, thx @montyxcantsin)
  • min and max aggregates use comparator instead of default js < comparison
  • Fixed a bug when fn inside a query on empty relation returned non-empty result
  • Filtered DB support via filter

0.6.0

  • [ BREAKING ] Entity ids and transaction ids now have to be numbers, attributes can only be keywords (strings if used from JS)
  • New method init-db for fast creation of DB from existing datoms (useful for e.g. initialization from serialized state)
  • Improved performance of transact! (~20%) and initial database population (init-db, db-from-reader, ~800%)

0.5.2

  • Externs provided via deps.cljs — no need to manually specify externs when using datascript dependency

0.5.1

  • Ability to pass inputs (predicates/functions bindings) down to rules (issues #28 #29)

0.5.0

  • Javascript version is now packaged as a proper CommonJS/RequireJS module (include via script tag still supported) (issue #39)
  • Published to npm: npmjs.org/package/datascript
  • [ BREAKING ] Javascript namespace is renamed from datascript.js to datascript

0.4.2

  • Reference transaction id inside transaction by using :db/current-tx instead of entity id (issue #32)
  • You can get id of transaction from TxReport: (get-in tx-report [:tempids :db/current-tx])
  • Ability to pass arbitrary metadata along with transaction (third argument to transact!) and read it in listener callback (:tx-meta key of TxReport) (issue #32)

0.4.1

  • Added :db.fn/cas transaction function (issue #20, thx @montyxcantsin)
  • Added get-some, get-else, misssing? query functions (issue #21, thx @montyxcantsin)
  • Fixed touch breaking entity cache (issue #17)
  • Added ground fn (issue #25)
  • Fixed query predicate/fn calls without free variables
  • Retract incoming entity references on :db.fn/retractEntity (issue #18)
  • You can now use reverse relation name when transacting entity as a map

0.4.0

Cosmetic changes to better mimic Datomic API. Useful for sharing code between Datomic and DataScript:

  • Added tempid, resolve-tempid, db, transact, transact-async, index-range, squuid, squuid-time-millis
  • [ BREAKING ] renamed transact to with, with to db-with

0.3.1

  • Optimized speed of DB’s equiv and hash, Datom’s hash
  • Entity’s touch call accessible through datascript namespace
  • Accept sets in entity maps as values for :db.cardinality/many attributes

0.3.0

Proper entities implementation:

  • Entities are now lazy and implement usual Map protocols
  • [ BREAKING ] When accessing attribute of :db/valueType :db.type/ref, its value will be automatically expanded to entites, allowing for recursive exploration of entities graphs (e.g. (-> (d/entity db 42) :parent :parent :children))
  • Entities support backwards navigation (e.g. (:person/_friends (d/entity db 42)))

0.2.1

  • Externs file now can be referred as :externs [datascript/externs.js"]

0.2.0

Big performance improvements:

  • New B-tree based indexes
  • New set-at-a-time, hash-join powered query and rules engine
  • Queries now up to 10× times faster
  • You can specify DB for rule call (like ($db follows ?e1 ?e2))
  • Datoms are required to have integer id and keyword attributes, but no restriction on types of values

0.1.6

  • Clojure reader support (pr/read) for DB and Datom

0.1.5

  • datoms and seek-datoms API calls
  • referencing other entities’ tempids in transaction data (issue #10)

0.1.4

  • Transactor functions via :db.fn/call (thx @thegeez)
  • Vanilla JS API bindings
  • [ BREAKING ] Schema keywords namespaced on a par with Datomic schema

0.1.3

  • entity added