Ember for Designers: Components

Part of our ongoing "Ember for Designers" series. Learn how to get started with Ember by leveraging components.

Rails 4 Engines

February 12, 2014

At TaskRabbit, we have gone through a few iterations on how we make our app(s). In the beginning, there was the monolithic Rails app in the standard way with 100+ models and their many corresponding controllers and views. Then we moved to several apps with their own logic and often using the big one via API. Our newest project is a single “app” made up of several Rails engines. We have found that this strikes a great balance between the (initial) straightforwardness of the single Rails app and the modularity of the more service-oriented architecture.

We’ve talked about this approach with a few people and they often ask very specific questions about the tactics used to make this happen, so let’s go through it here and via a sample application.

Rails Engines

Rails Engines is basically a whole Rails app that lives in the container of another one. Put another way, as the docs note: an app itself is basically just an engine at the root level. Over the years, we’ve seen sen engines as parts of gems such as devise or rails_admin. These example show the power of engines by providing a large set of relatively self-contained functionality “mounted” into an app.

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