Editing Model–view–controller (section)

===Model===
{{See also|Data model}}
The central component of the pattern. It is the application's dynamic [[data structure]], independent of the user interface.<ref>Burbeck, Steve (1992) [https://web.archive.org/web/20120729161926/http://st-www.cs.illinois.edu/users/smarch/st-docs/mvc.html Applications Programming in Smalltalk-80:How to use Model–View–Controller (MVC)]</ref> It directly manages the data, logic and rules of the application. In Smalltalk-80, the design of a model type is left entirely to the programmer.<ref>{{cite book |last1=LaLonde |first1=Wilf R. |last2=Pugh |first2=John R. |date=1991 |title=Inside Smalltalk |url=https://books.google.com/books?id=RRkiAQAAIAAJ |location=U.S.A. |publisher=Prentice-Hall Inc. |isbn=0-13-467309-3 |page=8 |quote=The model can be any object without restriction.}}</ref> With WebObjects, Rails, and Django, a model type typically [[object–relational mapping|represents]] a table in the application's [[database]].<ref>{{cite book |author=<!--Staff writer(s); no by-line.--> |date=May 2001 |title=WebObjects System Overview |url=https://developer.apple.com/library/archive/documentation/LegacyTechnologies/WebObjects/WebObjects_5/WebObjectsOverview/WebObjectsOverview.pdf |location=Cupertino, CA |publisher=Apple Computer, Inc. |page=28 |quote=In WebObjects, a model establishes and maintains a correspondence between an enterprise object class and data stored in a relational database.}}</ref><ref>{{cite web |url=https://guides.rubyonrails.org/active_record_basics.html |title=Active Record Basics |author=<!--Not stated--> |date=<!--Not stated--> |website=Rails Guides |access-date=October 27, 2022 |quote=This will create a <code>Product</code> model, mapped to a products table at the database.}}</ref><ref>{{cite web |url=https://docs.djangoproject.com/en/4.1/topics/db/models/ |title=Models |author=<!--Not stated--> |date=<!--Not stated--> |website=Django Documentation |access-date=October 27, 2022 |quote=Generally, each model maps to a single database table.}}</ref> The model is essential for keeping the data organized and consistent. It ensures that the application's data behaves according to the defined rules and logic.