Packages

t

molecule.core.generic

GenericAEVT

trait GenericAEVT extends AnyRef

AEVT Index.

"The AEVT index provides efficient access to all values for a given attribute, comparable to traditional column access style." (from Datomic documentation)

Access the AEVT Index in Molecule by instantiating an AEVT object with one or more arguments and then add generic attributes:

for {
  // Create AEVT Index molecule with 1 entity id argument
  _ <- AEVT(":Person/name").e.v.t.get.map(_ ==> List(
    (e1, "Ben", t2),
    (e2, "Liz", t5)
  ))

  // Narrow search with multiple arguments
  _ <- AEVT(":Person/name", e1).e.v.get.map(_ ==> List( (e1, "Ben") ))
  _ <- AEVT(":Person/name", e1, "Ben").e.v.get.map(_ ==> List( (e1, "Ben") ))
  _ <- AEVT(":Person/name", e1, "Ben", t2).e.v.get.map(_ ==> List( (e1, "Ben") ))
} yield ()

Index attributes available:

  • e - Entity id (Long)
  • a - Full attribute name like ":Person/name" (String)
  • v - Value of Datoms (Any)
  • t - Transaction pointer (Long/Int)
  • tx - Transaction entity id (Long)
  • txInstant - Transaction wall clock time (java.util.Date)
  • op - Operation status: assertion (true) / retraction (false)
Source
GenericAEVT.scala
Note

The Molecule Index API's don't allow returning the whole Index/the whole database. So omitting arguments constructing the Index object (like AEVT.a.e.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.AEVT)

Linear Supertypes
AnyRef, Any
Known Subclasses
api, api, in1_out1, in1_out10, in1_out11, in1_out12, in1_out13, in1_out14, in1_out15, in1_out16, in1_out17, in1_out18, in1_out19, in1_out2, in1_out20, in1_out21, in1_out22, in1_out3, in1_out4, in1_out5, in1_out6, in1_out7, in1_out8, in1_out9, in2_out1, in2_out10, in2_out11, in2_out12, in2_out13, in2_out14, in2_out15, in2_out16, in2_out17, in2_out18, in2_out19, in2_out2, in2_out20, in2_out21, in2_out22, in2_out3, in2_out4, in2_out5, in2_out6, in2_out7, in2_out8, in2_out9, in3_out1, in3_out10, in3_out11, in3_out12, in3_out13, in3_out14, in3_out15, in3_out16, in3_out17, in3_out18, in3_out19, in3_out2, in3_out20, in3_out21, in3_out22, in3_out3, in3_out4, in3_out5, in3_out6, in3_out7, in3_out8, in3_out9, out1, out10, out11, out12, out13, out14, out15, out16, out17, out18, out19, out2, out20, out21, out22, out3, out4, out5, out6, out7, out8, out9
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  20. object AEVT extends AEVT_0_0_L0[AEVT_, Init] with FirstNS

    AEVT Index object to start AEVT Index molecule.

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