Unexpected `nil` values when using `pluck` on nested associations in Rails 7
I've been researching this but I'm wondering if anyone has experience with Hey everyone, I'm running into an issue that's driving me crazy. I'm working with an scenario when trying to fetch specific attributes from nested associations using the `pluck` method. I'm using Rails 7 with PostgreSQL, and I'm attempting to get a list of user names and their associated post titles. However, I'm getting `nil` for certain users who don't have any posts, which is not the behavior I expected. Here’s the code I'm using: ```ruby User.joins(:posts).pluck('users.name', 'posts.title') ``` This returns an array of arrays, but for users without posts, I’d like to retrieve the user's name with a `nil` for the post title instead of excluding them entirely. I tried using `left_joins`, as I thought it might help, but it still returns an empty result set for users without posts: ```ruby User.left_joins(:posts).pluck('users.name', 'posts.title') ``` The result here is an empty array when I expect users to show up with `nil` post titles. I also tried checking if the associations are properly set up, and they seem fine. The `User` model has a `has_many :posts` association, and the `Post` model has a `belongs_to :user` association. Here’s a snippet of the models: ```ruby class User < ApplicationRecord has_many :posts end class Post < ApplicationRecord belongs_to :user end ``` I would appreciate any guidance on how to achieve the desired output where users without posts are still included in the result with `nil` values for the post titles. Is there a better approach using ActiveRecord to handle this case? I'm working on a API that needs to handle this. I'm working on a web app that needs to handle this. I'd really appreciate any guidance on this. Any advice would be much appreciated. This is happening in both development and production on CentOS. Am I missing something obvious?