By default, associations are generated automatically from the field type

Person : Address for example or Person : [ Address ] with the type enclosed in square brackets for a collection

However, it is sometimes necessary to add additional information, such as the minimum and maximum number of items in a list.
This is particularly true if you want to produce a more advanced UML-type model.

To do this, Akwatype has these attributes that you can use when a field is of a complex type.

  • associationName
    • Name of the association between this field and another entity
  • associationType
    • Type of the association (Association,  Aggregation, Composition)
  • minItems
    • Minimum number of items allowed in a collection field
  • maxItems
    • Maximum number of items allowed in a collection field
  • reverse
    • Name of a field in the type of the current field that points back to the type containing the current field

 

You may also need to use the option Advanced link display option of the Data Explorer to display all the additionnal information

 

Example

 

Types

type Engine { 
   serialNumber:String
   description:String
   horsepower :Integer
}

type wheel{
    id:String
    size:Integer
    model:String
}

type Chassis {
    serialNumber:String
    description:String
    plateforme:String
}

type Person {
   id:String
   name:String
   firstName:String
   cars:[Car]{
    associationName: "own"
   }
}

type Car {
    Vin: String
    brand: String
    engine:Engine{
        associationType: "Composition"
        associationName: "powered by"
        minItems: 1, maxItems: 1
    }
    weels:[wheel]{
        associationType: "Aggregation"
        associationName: "has"
        minItems: 3, maxItems: 4

    }
    chassis : Chassis{
        associationType: "Composition"
        associationName: "Build on"
        minItems: 1, maxItems: 1
    }
    owner:Person{
        reverse: cars
        minItems: 1
    }
}