What are some examples of using collections in Ruby on Rails?

What are some examples of using collections in Ruby on Rails?

In Ruby on Rails, collections are often used to manage groups of objects. For example, you can use the all method to retrieve all records from a model.

Can you give me a specific example with a model?

Sure! If you have a Post model, you can retrieve all posts with Post.all. This returns an ActiveRecord relation of all post records.

What about filtering collections?

You can filter collections using methods like where. For instance, Post.where(published: true) retrieves all published posts.

Are there any methods to sort these collections?

Yes! You can use the order method. For example, Post.order(created_at: :desc) sorts posts by creation date in descending order.