When should I use partials in Rails?

When should I use partials in Rails?

Partials in Rails are useful for breaking down complex views into smaller, reusable components. You should use them when you have repeated code or when a view becomes too large.

Can you give me an example of when to use a partial?

Sure! If you have a list of users displayed in multiple places, you can create a _user.html.erb partial to render each user. This way, you avoid duplicating the code.

Are there any performance considerations with using partials?

Yes, while partials promote DRY code, excessive use can lead to performance issues due to rendering overhead. It's best to balance reusability with performance.

How do I pass local variables to a partial?

You can pass local variables to a partial by using the :locals option. For example, render partial: 'user', locals: { user: @user }.