Curso GeneXus

Versión: Evolution 3
Curso online

More use cases of subtypes

Introduction of the case of indirect multiple references, recursive subtypes, entity specialization, and mention of the usage cases of elimination of unwanted relations through compound foreign keys (though not studied).
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In the “What are subtypes?” video we saw the concept of subtype, supratype, group of subtypes based on a single usage case: the multiple reference from one transaction to another. Other usage cases were also presented. We study them here, in addition to presenting other cases.
 
Related
New entities added to the project
Creation of a transaction
Subtypes
Business Components
First transaction design
Working with attributes and domains
Identifying availabe attributes
Relations between entities from reality
Defining more transactions
What are the subtypes?
Another example of database update using transactions without form
Two level transaction used as Business Component, and error management
First transaction design
First transaction design - PDF
Working with attributes and domains
Curso em processo de tradução

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