implementing JSON API serialization in Rails 7 when using ActiveModel::Serializers
I've been struggling with this for a few days now and could really use some help. This might be a silly question, but I'm working with a question with JSON API serialization in my Rails 7 application that uses ActiveModel::Serializers. When I attempt to serialize my User model, I'm getting unexpected attributes in the JSON response, and some of my associations are not included as expected. For instance, I have the following serializer: ```ruby class UserSerializer < ActiveModel::Serializer attributes :id, :name, :email has_many :posts end ``` My User model has a `has_many :posts` association, but when I make a GET request to my users endpoint, the serialized JSON looks like this: ```json { "id": 1, "name": "Alice", "email": "alice@example.com" } ``` I was expecting the posts to be included as an array, yet they are completely missing from the response. I've followed the documentation, and I'm using `render json: @user` in my controller. I've also confirmed that the posts exist for the user. I tried explicitly adding `include: [:posts]` in my render call: ```ruby render json: @user, include: [:posts] ``` But the output remains unchanged. I also checked for any potential issues with the serializer configuration in my application. The `ActiveModelSerializers` gem version I'm using is 0.10.0. Could there be a conflict or a specific setting I missed that prevents the posts from being serialized properly? Any guidance or troubleshooting steps would be greatly appreciated. This is part of a larger application I'm building. The project is a REST API built with Ruby. How would you solve this?