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talk
Thick QuerySets and Thin Models, or Where to Put Business Logic in Django(en)
スピーカー
Michal Nakoneczny
対象レベル：
中級
カテゴリ：
Web Frameworks
説明
In this talk, I want to formulate a number of arguments against following the "Fat Models" and rival approaches to organising Business Logic code in a Django project codebase and ultimately suggest a better solution and outline possible advantages and disadvantages of each approach.
目的
Attendees should get a clear image of all the possible problems stemming from following the "Fat Models" approach to organising Business Logic in a Django project and be able to evaluate how alternative approaches fit their needs.
概要
In this talk, I want to formulate a number of arguments against following the "Fat Models" and rival approaches to organising Business Logic code in a Django project codebase and ultimately suggest a better solution and outline possible advantages and disadvantages of each approach.
The discussed approaches include:
1. Organising BL code as Models' methods.
2. Dispersing BL code between a number of Views, Forms, and/or Serializers.
3. Defining a completely separate Services layer.
4. Organising BL code as QuerySets'/Managers' methods.
An example for each approach is given by a way of a real-world example and each approach is evaluated according to the following criteria:
- Code repetition (violation of the DRY principle);
- code testability;
- code readability.
Finally, a discussion of new challenges stemming from the proposed Approach no 4 - especially concerning business rules validation and integration with external APIs - is presented.
