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Rails 7.1: Problems with custom JSON serialization in ActiveModel, unexpected attributes included

👀 Views: 30 đŸ’Ŧ Answers: 1 📅 Created: 2025-06-30
ruby-on-rails active-model json-serialization Ruby

I need help solving I tried several approaches but none seem to work. I've been banging my head against this for hours. I'm working on a personal project and I'm having trouble with custom JSON serialization in my Rails 7.1 application using ActiveModel. I've created a serializer for a `Post` model, and while I expect only specific attributes to be included in the JSON output, I'm seeing additional attributes that I did not specify. Here's my serializer code: ```ruby class PostSerializer < ActiveModel::Serializer attributes :id, :title, :content end ``` And when I request the JSON output for a post: ```ruby post = Post.find(1) render json: post, serializer: PostSerializer ``` The expected output should only include `id`, `title`, and `content`, but I see extra attributes like `created_at` and `updated_at`. The output looks like this: ```json { "id": 1, "title": "My First Post", "content": "This is the content of my first post.", "created_at": "2023-01-01T00:00:00.000Z", "updated_at": "2023-01-01T00:00:00.000Z" } ``` I've tried explicitly defining the `attributes` method in the serializer, but the extra attributes still appear. I've also checked if there's a global configuration in `config/initializers` that might be overriding my serializer settings, but found nothing unusual. Is there something I might be missing? How can I ensure that only the specified attributes are serialized in the JSON response? This is part of a larger CLI tool I'm building. Thanks in advance! I'm working on a application that needs to handle this. What am I doing wrong? Am I missing something obvious? I'm open to any suggestions. Hoping someone can shed some light on this.