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The out-of-the-box Rails templating engine, ERB, is a great way to build pages with variable content. Common Mistake #2: Putting too much logic in the view While this still pushes the limits of the single responsibility principle, it’s sort of the bare minimum that the Rails framework requires us to have in the controller. Rendering the result (html, xml, json, etc.) or redirecting, as appropriate. Gathering request parameters and calling an appropriate model method to persist them.

Ideally this should be a call to a single find method setting an instance variable to be used later to render the response.

Logic for finding the right model object given the parameters passed in from the request. This might also include authentication/authorization or any additional cookie processing you need to do. Generally, the only types of logic you should have in your controller are:

#YML FILE EDITOR FOR RUBY CODE#

The problem is that the controller object will start to violate the single responsibility principle making future changes to the code base difficult and error-prone. It’s all too easy to move view logic (which is better housed in a helper), or domain/model logic, into the controller. In the Rails community, we’ve been talking about fat model, skinny controller for a while now, yet several recent Rails applications I’ve inherited violated this principle. Common Mistake #1: Putting too much logic in the controller

#YML FILE EDITOR FOR RUBY HOW TO#

This tutorial looks at 10 common Rails problems, including how to avoid them and the issues that they cause. It can also have undesirable ramifications with regard to security and performance.Īccordingly, while Rails is easy to use, it is also not hard to misuse. Most notably, the “magic” that happens behind the scenes in the framework can sometimes lead to headfakes, confusion, and “what the heck is going on?” types of problems. While this paradigm has its advantages, it is also not without its pitfalls. Simply put, this means that, by default, Rails assumes that its expert developers will follow “standard” best practice conventions (for things like naming, code structure, and so on) and, if you do, things will work for you “auto-magically” without your needing to specify these details. Rails is built on the principle of convention over configuration. Ruby on Rails (“Rails”) is a popular open source framework, based on the Ruby programming language that strives to simplify and streamline the web application development process.

Yml file editor for ruby