Pulling It All Together

Agile Web Development with Rails 6 — by Sam Ruby, David Bryant Copeland, with Dave Thomas (29 / 102)

👈 Marshaling Objects | TOC | Ruby Idioms 👉

Let’s look at an example of how Rails applies a number of Ruby features together to make the code you need to maintain more declarative. You’ll see this example again in ​Generating the Scaffold​. For now, we’ll focus on the Ruby-language aspects of the example:

The definition of decimal also accepts a number of optional parameters, expressed as a hash.

To someone new to Ruby, this is a lot of heavy machinery thrown at solving such a simple problem. To someone familiar with Ruby, none of this machinery is particularly heavy. In any case, Rails makes extensive use of the facilities provided by Ruby to make defining operations (for example, migration tasks) as simple and as declarative as possible. Even small features of the language, such as optional parentheses and braces, contribute to the overall readability and ease of authoring.

Finally, a number of small features — or, rather, idiomatic combinations of features — are often not immediately obvious to people new to the Ruby language. We close this chapter with them.

👈 Marshaling Objects | TOC | Ruby Idioms 👉

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