What are collections in Ruby on Rails?

What are collections in Ruby on Rails?

In Ruby on Rails, collections refer to groups of objects that can be manipulated as a single entity, often using ActiveRecord.

Can you give me an example of how to use collections?

Sure! You can use methods like all, where, and order to retrieve collections of records from the database.

What is the difference between has_many and belongs_to?

has_many indicates a one-to-many relationship, while belongs_to indicates a many-to-one relationship between models.

How do I iterate over a collection in Rails?

You can use the each method to iterate over a collection. For example: @users.each do |user| ... end.