Flux stores can be comparable with the models in MVC, though essentially they are not the same. From similar point of view, they are the same as all the business logic and computations happen in the Flux store. According to the Facebook team, "Stores manage the state of many objects—they do not represent a single record of data like ORM models do. Nor they are the same as Backbone's collections. More than simply managing a collection of ORM-style objects, stores manages the application state for a particular domain within the application."
Source https://en.wikipedia.org/wiki/Object-relational_mapping.
Object Relational Mapping (ORM) in computer science is a programming technique for converting data between incompatible type systems in object-oriented programming languages. This creates, in effect, a "virtual object database" that can be used from within the programming language. In object-oriented programming, data management tasks act on object-oriented (OO) objects that are almost...