object AttrExpressions extends AttrExpressions
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trait
? extends AnyRef
Turn molecule into input molecule awaiting input.
Turn molecule into input molecule awaiting input.
Apply input marker?
to attribute to turn molecule into an 'input molecule'.
At runtime the input molecule expects input for the attribute in place of the?
marker.// Input molecule created at compile time. val ageOfPersons = m(Person.name_(?).age) // awaiting name of type String // At runtime, "Ben" is applied as input replacing the `?` placeholder and we can get the age. ageOfPersons("Ben").get === List(42)
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Data can only be retrieved from input molecules once they have been resolved with input.
Input molecule queries are cached and optimized by Datomic.
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type
?? = ?
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trait
AttrExpr[Ns, T] extends AnyRef
Expression methods common for all attributes.
Expression methods common for all attributes.
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- AttrExpressions
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trait
FulltextExpr[Ns, In] extends AnyRef
Expression methods of String attributes with fulltext search.
Expression methods of String attributes with fulltext search.
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- AttrExpressions
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trait
ManyAttrExpr[Ns, Add, OldNew, Rem] extends AnyRef
Value update methods for card-many attributes.
Value update methods for card-many attributes.
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trait
ManyExpr[Ns, In, T] extends ValueAttrExpr[Ns, In, T] with ManyAttrExpr[Ns, T, (T, T), T]
Expression methods of card-many attributes.
Expression methods of card-many attributes.
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- AttrExpressions
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trait
MapAttrExpr[Ns, In, T] extends ValueAttrExpr[Ns, In, T] with ManyAttrExpr[Ns, (String, T), (String, T), String]
Expression methods of map attributes.
Expression methods of map attributes.
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- AttrExpressions
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trait
OneExpr[Ns, In, T] extends ValueAttrExpr[Ns, In, T]
Expression methods of card-one attributes.
Expression methods of card-one attributes.
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- AttrExpressions
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trait
OptionalExpr[Ns, T] extends AnyRef
Expression methods of optional attributes.
Expression methods of optional attributes.
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- AttrExpressions
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trait
ValueAttrExpr[Ns, In, T] extends AttrExpr[Ns, T]
Expression methods of value attributes.
Expression methods of value attributes.
- Definition Classes
- AttrExpressions
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trait
unify extends AnyRef
Unify attribute value in self-join.
Unify attribute value in self-join.
Applyunify
marker to attribute to unify its value with previous values of the same attribute in the molecule in a self-join.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.sorted === List( ("Joe", "Coffee", "Ben"), ("Liz", "Coffee", "Ben"), ("Liz", "Tea", "Ben") )
- Definition Classes
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Value Members
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final
def
!=(arg0: Any): Boolean
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final
def
##(): Int
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final
def
==(arg0: Any): Boolean
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final
def
asInstanceOf[T0]: T0
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def
clone(): AnyRef
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final
def
eq(arg0: AnyRef): Boolean
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def
equals(arg0: Any): Boolean
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def
finalize(): Unit
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final
def
getClass(): Class[_]
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def
hashCode(): Int
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final
def
isInstanceOf[T0]: Boolean
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def
ne(arg0: AnyRef): Boolean
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final
def
notify(): Unit
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final
def
notifyAll(): Unit
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final
def
synchronized[T0](arg0: ⇒ T0): T0
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def
toString(): String
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final
def
wait(): Unit
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final
def
wait(arg0: Long, arg1: Int): Unit
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final
def
wait(arg0: Long): Unit
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Attribute markers
Markers applied to attributes that change the semantics of the attribute/molecule.
Documentation/API for the Molecule library - a meta DSL for the Datomic database.
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