Type Members

1.  abstract class DomainStructure extends AnyRef

   Domain structure definition

   Domain structure definition

   Define a Domain structure to be handled by Molecule in an object that extends this Domain class.

   A domain structure consists of traits describing real world entities. Each entity/trait is given a name and defines a list of attributes that are the relevant properties of the entity.

   A maxArity number is applied to Domain to tell Molecule how many Attributes it should create boilerplate code for, or how many attribute values are expected at most to be returned from molecule queries. This is to generate a minimum of boilerplate code.

   package path.to.your.project
   import molecule.Domain
   
   object Community extends Domain(8) { // "Community" domain
   
     trait Person {          // "Person" entity
       val name = oneString  // Person "name" String attribute definition
       val age  = oneInt     // Person "age" Int attribute definition
     }
   
     // Additional entities...
   }

   For larger projects, it is recommended to organize the domain structure in segments of related entity traits within objects:

   object Seattle extends Domain(15) {
   
     object customer { // "customer" segment
       trait Person {
         val name    = oneString
         val age     = oneInt
         val address = one[Address]         // Cardinality-one relationship to Address
         val bought  = many[products.Item]  // Cardinality-many relationship to products.Item
       }
       trait Address {
         val street = oneString.fulltext
         val city   = oneInt
       }
       // ..more entities in the `customer` segment
     }
   
     object products { // "products" segment
       trait Item {
         val title   = oneString
         val inStock = oneInt
       }
       // ..more entities in the `products` segment
     }
   
     // Additional segments...
   }