To see demonstrations of other engines, check outĪuthentication for its parent applications, orįinally, engines would not have been possible without the work of James Adam, Only be enhancing it, rather than changing it drastically. Has final say in what goes on in its environment. It's important to keep in mind at all times that the application shouldĪlways take precedence over its engines. Along with this, controllers, modelsĪnd table names are also namespaced. This means that anĪpplication is able to have a path provided by a routing helper such asĪrticles_path and use an engine that also provides a path also calledĪrticles_path, and the two would not clash. Will be working solely within the engine itself, but in later sections you'llĮngines can also be isolated from their host applications. ThisĮngine will provide blogging functionality to its host applications, allowingįor new articles and comments to be created. The engine that will be created in this guide will be called "blorgh". "full plugins" simply as "engines" throughout. We'll actually be using the -mountable option here, which includesĪll the features of -full, and then some. Rails (as indicated by the -full option that's passed to the generatorĬommand). The difference is that an engine is considered a "full plugin" by The two share a common libĭirectory structure, and are both generated using the rails plugin new
Engines andĪpplications also share a common structure.Įngines are also closely related to plugins. Just with subtle differences, as you'll see throughout this guide. Therefore, engines and applications can be thought of as almost the same thing,
A Rails application is actually just a "supercharged"Įngine, with the Rails::Application class inheriting a lot of its behavior
Engines can be considered miniature applications that provide functionality to
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