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Asked: 2026-06-04T10:49:17+00:00

For example, Post has_many Comments . How to find all posts that doesn’t have

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For example, Post has_many Comments.

How to find all posts that doesn’t have any comments?

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1 Answer

  1. Editorial Team

    You could use a not exists like:

    Post.where(" not exists (select 'x' from comments where comments.post_id = posts.id)")
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