Molecule/molecule/molecule.boilerplate/molecule.boilerplate.api/KeywordsStable/unify

unify

molecule.boilerplate.api.KeywordsStable.unify

trait unify extends Kw

Unify attribute value in self-join.

Apply unify marker to attribute to unify its value with previous values of the same attribute in the molecule in a self-join.

for {
 _ <- m(Person.age.name.Beverages * Beverage.name.rating) insert List(
   (23, "Joe", List(("Coffee", 3), ("Cola", 2), ("Pepsi", 3))),
   (25, "Ben", List(("Coffee", 2), ("Tea", 3))),
   (23, "Liz", List(("Coffee", 1), ("Tea", 3), ("Pepsi", 1))))

 // What beverages do pairs of 23- AND 25-year-olds like in common?
 // Drink name is unified - Joe and Ben both drink coffee, etc..
 _ <- Person.age_(23).name.Beverages.name._Ns.Self
     .age_(25).name.Beverages.name_(unify).get.map(_.sorted ==> List(
   ("Joe", "Coffee", "Ben"),
   ("Liz", "Coffee", "Ben"),
   ("Liz", "Tea", "Ben")
 ))
} yield ()

Attributes

Source: Keywords.scala
Graph
Supertypes: trait Kw

class Object

trait Matchable

class Any
Known subtypes: object unify.type

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