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Enumerations and Model Classes in Model Code

Enumerations and Model Classes in Model Code

Let’s take a look at how the model class is coded.

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Code the enumerations

Enumerations are coded in the following way with the help of the Enumeration meta-class:

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var PublicationFormEL = new Enumeration(
   ["hardcover", "paperback", "ePub", "PDF"]);
var BookCategoryEL = new Enumeration(
   ["novel", "biography", "textbook", "other"]);
var LanguageEL = new Enumeration({ "en": "English", "de": "German", "fr": "French", "es": "Spanish" });

Notice that LanguageEL defines a code list enumeration, while PublicationFormEL defines a simple enumeration.

Code the model class as JS class

It’s a good idea to ...