Application tables

Table objects are the foundation of every NAV application. Tables contain data structure definitions, as well as properties that describe the behavior of the data, including data validations and constraints.

More business logic is required in complex applications than in simple data type validation, and NAV allows C/AL code to be put in the table to control insertion, modification, and deletion of records as well as logic on the field level. When the bulk of the business logic is coded at the table level, it is easier to develop, debug, support, modify, and even upgrade. Good design in NAV requires that as much of the business logic as possible reside in the tables. Having the business logic coded at the table level doesn't necessarily mean the code is resident in the table. NAV 2015 Help recommends the following guidelines for placing C/AL code:

Tip

In general, put the code in codeunits instead of on the object on which it operates. This promotes a clean design...