trait CompositeInit extends NS
Build composite molecule.
Composite molecules model entities with attributes from different namespaces that are
not necessarily related. Each group of attributes is modelled by a molecule and the
"sub-molecules" are tied together with +
methods to form a composite molecule.
The attributes of the first sub-molecule are tied
together in a tuple of its own before being merged with the tuple of attribute values
of the second sub-molecule. If any of the sub-molecules are of arity-1, then no tuple is created:
// Arity 1 + 1 m(Article.name + Tag.category).get === List( ("Battle of Waterloo", "History") ) // Arity 1 + 2 m(Article.name + Tag.category.weight).get === List( ("Battle of Waterloo", ("History", 5)) ) // Arity 2 + 1 m(Article.name.author + Tag.category).get === List( (("Battle of Waterloo", "Ben Bridge"), "History") ) // Arity 2 + 2 m(Article.name.author + Tag.category.weight).get === List( (("Battle of Waterloo", "Ben Bridge"), ("History", 5)) ) // Arity 3 + 2 etc... m(Article.name.author.editor + Tag.category.weight).get === List( (("Battle of Waterloo", "Ben Bridge", "Joe Moe"), ("History", 5)) )
- Source
- CompositeInit.scala
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Documentation/API for the Molecule library - a meta DSL for the Datomic database.
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