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  Documentation/API for the Molecule library - a meta DSL for the Datomic database.

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•  package molecule

  Molecule library - a Scala meta-DSL for the Datomic database.

  Molecule library - a Scala meta-DSL for the Datomic database.

  Definition Classes

  root

•  package core

  Definition Classes

  molecule

•  package generic

  Definition Classes

  core

•  package index

  Datomic Index APIs in Molecule.

  Datomic Index APIs in Molecule.
  
  Datomic maintains four indexes that contain ordered sets of datoms. Each of these indexes is named based on the sort order used:

  • EAVT - Datoms sorted by Entity-Attribute-Value-Transaction
  • AVET - Datoms sorted by Attribute-Value-Entity-Transaction
  • AEVT - Datoms sorted by Attribute-Entity-Value-Transaction
  • VAET - "Reverse index" for reverse lookup of ref types

  Create an Index molecule by instantiating an Index object with one or more arguments in the order of the Index's elements. Datoms are returned as tuples of data depending of which generic attributes you add to the Index molecule:

  // Create EAVT Index molecule with 1 entity id argument
  EAVT(e1).e.a.v.t.get === List(
    (e1, ":Person/name", "Ben", t1),
    (e1, ":Person/age", 42, t2),
    (e1, ":Golf/score", 5.7, t2)
  )
  
  // Maybe we are only interested in the attribute/value pairs:
  EAVT(e1).a.v.get === List(
    (":Person/name", "Ben"),
    (":Person/age", 42),
    (":Golf/score", 5.7)
  )
  
  // Two arguments to narrow the search
  EAVT(e1, ":Person/age").a.v.get === List(
    (":Person/age", 42)
  )

  Definition Classes

  generic

  Note

  The Molecule Index API's don't allow returning the whole Index/the whole database. So omitting arguments constructing the Index object (like EAVT.e.a.v.t.get) will throw an exception.
  Please use Datomics API if you need to return the whole database Index:
  conn.db.datoms(datomic.Database.EAVT)

• AEVT
• AEVT_0
• AEVT_1
• AEVT_2
• AEVT_3
• AEVT_4
• AEVT_5
• AEVT_6
• AEVT_7
• AVET
• AVET_0
• AVET_1
• AVET_2
• AVET_3
• AVET_4
• AVET_5
• AVET_6
• AVET_7
• EAVT
• EAVT_0
• EAVT_1
• EAVT_2
• EAVT_3
• EAVT_4
• EAVT_5
• EAVT_6
• EAVT_7
• GenericAEVT
• GenericAVET
• GenericEAVT
• GenericVAET
• VAET
• VAET_0
• VAET_1
• VAET_2
• VAET_3
• VAET_4
• VAET_5
• VAET_6
• VAET_7

molecule.core.generic.index

GenericEAVT