Book Image

Learning Dynamics NAV Patterns

By : Marije Brummel
Book Image

Learning Dynamics NAV Patterns

By: Marije Brummel

Overview of this book

Microsoft Dynamics NAV is a complete ERP system, which also contains a robust set of development tools to support customization and enhancement. These include an object designer for each of the seven application object types, a business application-oriented programming language with .NET interface capability, a compiler, a debugger, and programming testing language support. Learning Dynamics NAV Patterns will guide you through the NAV way of solving problems. This book will first introduce you to patterns and the software architecture of the NAV and then help you to build an example application. Then, it walks you through the details of architectural patterns, design patterns, and implementation patterns. This book will also talk about anti-patterns and handling legacy code. Finally, it teaches you to build solutions using patterns. Proven patterns and best practices will help you create better solutions that are easy to maintain in larger teams across several locations. It will guide you through combining abstract patterns using easy-to-understand examples and will help you decide which patterns to use in which scenarios.
Table of Contents (9 chapters)
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When working with objects and methods in ERP, we traditionally implement them directly. In other words, we implement tight coupling. The class calls the method, and the method only accepts calls from the object. We cannot run a Codeunit with a record that it does not relate to. This ensures a contract, the table, between the class and the method, allows the compiler to check integrity and prevents the software from being wrongly used.

In C/AL Code, this would look like: SalesPost.RUN(SalesHeader), which ensures a tight contract between the Codeunit (SalesPost) and the table (SalesHeader).

In OOP, we can also implement loose coupling. When this is implemented, we implement an intermediate class in between the object and the method. This allows flexibility, but it increases the risk of the wrong use of the software. At design time, the method does not know its caller, and the caller may not know the method.

The Fa&...