Unexpected behavior when using `map` with ActiveRecord Relations in Ruby on Rails 6
I've hit a wall trying to I've searched everywhere and can't find a clear answer... I'm encountering an unexpected issue when trying to use the `map` method on a Rails ActiveRecord relation. I have a model called `Post`, which has a `title` and `body`. I want to retrieve the titles of the posts that belong to a specific user, but I'm not getting the expected results. Here's the code I'm using: ```ruby user = User.find(1) titles = user.posts.map(&:title) ``` I expected `titles` to return an array of post titles for the user with ID 1. However, I noticed that it sometimes returns an empty array even when I know there are posts associated with this user. This seems to happen only under certain conditions, such as when the user has been recently updated, or perhaps when posts are soft-deleted using the `paranoia` gem. I've confirmed that the records exist in the database by executing the following query directly: ```sql SELECT title FROM posts WHERE user_id = 1; ``` This returns the expected results. I've also checked if the user has any associated posts by executing `user.posts.blank?`, and that returns `false`. To troubleshoot further, I tried using `pluck` instead of `map`: ```ruby titles = user.posts.pluck(:title) ``` This works as expected and always returns the correct titles, but I prefer to use `map` for its readability in certain contexts. Is there something specific about `map` and ActiveRecord relations that I might be overlooking? Any insights into why this behavior might be occurring would be greatly appreciated. Also, I'm on Rails 6.1.4 and Ruby 2.7.2, in case that helps narrow down any version-specific issues. This is part of a larger API I'm building. Thanks in advance! The project is a microservice built with Ruby. Thanks for any help you can provide!