How can I use scopes in Rails models?

How can I use scopes in Rails models?

In Rails, scopes are used to define commonly used queries that can be reused throughout your application. You can define a scope in your model like this: scope :active, -> { where(active: true) }.

Can you give me an example of using a scope in a query?

Sure! After defining the scope, you can use it in your queries like this: User.active will return all users where the active attribute is true.

What if I want to chain multiple scopes together?

You can easily chain scopes! For example, if you have another scope scope :admin, -> { where(role: 'admin') }, you can do User.active.admin to get all active admin users.

Are there any performance considerations when using scopes?

Yes, while scopes can make your code cleaner, be mindful of performance. Ensure that your queries are optimized and consider using indexes on frequently queried columns.