What are associations in Active Record?

What are associations in Active Record?

Associations in Active Record are used to define relationships between different models in a Rails application.

Can you explain the different types of associations?

Sure! The main types are belongs_to, has_many, has_one, and has_and_belongs_to_many.

How do I set up a has_many association?

To set up a has_many association, you would add has_many :model_name in the parent model and belongs_to :parent_model in the child model.

What about the has_and_belongs_to_many association?

For has_and_belongs_to_many, you need a join table that connects the two models without a separate model for the join.