Packages

package root

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

Definition Classes: root

package molecule

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

Definition Classes: root

package core

Definition Classes: molecule

package api

Definition Classes: core

package ast

Internal Molecule ASTs.

Definition Classes: core

package composition

Methods to build transaction, composite and nested molecules.

Definition Classes: core

package data

Data model DSL and API.

Definition Classes: core

package dsl

Internal interfaces for auto-generated DSL boilerplate code.

Internal interfaces for auto-generated DSL boilerplate code.

Interfaces to the generated schema-defined DSL boilerplate code that the sbt-plugin generates when doing a sbt-compile. Molecule macros can then type-safely deduct the type structure of composed molecules.

Definition Classes: core

package exceptions

Exceptions thrown by Molecule.

Definition Classes: core

package expression

Attribute expressions and operations.

Attribute expressions and operations.

Refine attribute matches with various attribute expressions:

Person.age(42)                           // equality
Person.name.contains("John")             // fulltext search
Person.age.!=(42)                        // negation (or `not`)
Person.age.<(42)                         // comparison (< > <= >=)
Person.name("John" or "Jonas")           // OR-logic
Person.age()                             // apply empty value to retract value(s) in updates
Person.hobbies.assert("golf")               // add value(s) to card-many attributes
Person.hobbies.retract("golf")            // retract value(s) of card-many attributes
Person.hobbies.replace("golf", "diving") // replace value(s) of card-many attributes
Person.tags.k("en")                      // match values of map attributes by key
Person.age(Nil)                          // match non-asserted datoms (null)
Person.name(?)                           // initiate input molecules awaiting input at runtime
Person.name(unify)                       // Unify attributes in self-joins

Apply aggregate keywords to aggregate attribute value(s):

// Aggregates on any attribute type
Person.age(count).get.head         === 3   // count of asserted `age` attribute values
Person.age(countDistinct).get.head === 3   // count of asserted distinct `age` attribute values
Person.age(max).get.head           === 38  // maximum `age` value (using `compare`)
Person.age(min).get.head           === 5   // maximum `age` value (using `compare`)
Person.age(rand).get.head          === 25  // single random `age` value
Person.age(sample).get.head        === 27  // single sample `age` value (when single value, same as random)

// Aggregates on any attribute type, returning multiple values
Person.age(distinct).get.head  === Vector(5, 7, 38)  // distinct `age` values
Person.age(max(2)).get.head    === Vector(38, 7)     // 2 maximum `age` values
Person.age(min(2)).get.head    === Vector(5, 7)      // 2 minimum `age` values
Person.age(rand(2)).get.head   === Stream(5, ?)      // 2 random `age` values (values can re-occur)
Person.age(sample(2)).get.head === Vector(7, 38)     // 2 sample `age` values

// Aggregates on number attributes
Person.age(sum).get.head      === 50               // sum of all `age` numbers
Person.age(avg).get.head      === 16.66666667      // average of all `age` numbers
Person.age(median).get.head   === 7                // median of all `age` numbers
Person.age(stddev).get.head   === 15.107025591499  // standard deviation of all `age` numbers
Person.age(variance).get.head === 228.2222222222   // variance of all `age` numbers

Definition Classes: core

package factory

Factory methods m to instantiate molecules from custom DSL molecule constructs.

Definition Classes: core

package generic

Definition Classes: core

package macros

Definition Classes: core

package ops

Definition Classes: core

package transform

Definition Classes: core

package exception

CastHelpers

CastHelpersAggr

CastHelpersOptNested

DynamicMolecule

package util

Internal database functions for Datomic.

Definition Classes: core

molecule.core

transform

package transform

Content Hierarchy

Type Members

trait CastHelpers[Obj, Tpl] extends CastHelpersAggr
Core molecule interface defining actions that can be called on molecules.
Core molecule interface defining actions that can be called on molecules.
Generally we could often have made higher-order methods taking a casting function for variating cases. But we prioritize minimizing the macro-generated code as much as possible to lower compile time overhead.
trait CastHelpersAggr extends CastHelpersOptNested
Core molecule interface defining actions that can be called on molecules.
Core molecule interface defining actions that can be called on molecules.
Generally we could often have made higher-order methods taking a casting function for variating cases. But we prioritize minimizing the macro-generated code as much as possible to lower compile time overhead.
trait CastHelpersOptNested extends Helpers
Core molecule interface defining actions that can be called on molecules.
Core molecule interface defining actions that can be called on molecules.
Generally we could often have made higher-order methods taking a casting function for variating cases. But we prioritize minimizing the macro-generated code as much as possible to lower compile time overhead.
trait DynamicMolecule extends Dynamic

Packages

transform 

package transform

Type Members

Ungrouped

transform