CODEWITHSUNDEEP
ruby-on-railsactiverecordassociations
Peter Slotko
Peter Slotko

Reputation: 327

Rails joins + includes of same table?

In a project at work I see a lot of code like

SomeModel.includes(:comments).joins(:comments).[...] # many more where and order clauses, other stuff

My question is: Does it make any sense to use includes and joins on the same table like :comments?

Upvotes: 1

Views: 390

Answers (1)

Sergio Tulentsev
Sergio Tulentsev

Reputation: 230386

It may make sense. These two methods serve different purposes. You need joins if you want to filter Posts by attributes of their Comments. And you need includes to avoid N+1 queries when rendering posts with comments.

Upvotes: 1

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