How to correctly set up a polymorphic association with nested attributes in Rails 7?
This might be a silly question, but I'm working on a project and hit a roadblock... I'm working on a personal project and I'm working on a Rails 7 application where I need to set up a polymorphic association for comments, allowing comments to belong to either a Post or an Image model..... I want to implement nested attributes so that I can create comments directly alongside their associated posts or images. However, I'm running into issues when trying to save the nested attributes for comments. Here’s the code I have in my Post model: ```ruby class Post < ApplicationRecord has_many :comments, as: :commentable, dependent: :destroy accepts_nested_attributes_for :comments, allow_destroy: true end ``` And in my Comment model: ```ruby class Comment < ApplicationRecord belongs_to :commentable, polymorphic: true end ``` For the Image model, it's similar: ```ruby class Image < ApplicationRecord has_many :comments, as: :commentable, dependent: :destroy accepts_nested_attributes_for :comments, allow_destroy: true end ``` In the controller, I'm permitting the nested parameters like this: ```ruby def post_params params.require(:post).permit(:title, :body, comments_attributes: [:id, :content, :_destroy]) end ``` However, when I try to create a new Post with comments using a form, I get this behavior: `ActiveRecord::RecordInvalid (Validation failed: Comments is invalid)` and the comments are not being saved. I’ve checked that the Comment model has a `content` attribute and that there are no validation errors on it. I should also note that I have a form nested like this: ```erb <%= form_with(model: @post) do |form| %> <%= form.text_field :title %> <%= form.text_area :body %> <%= form.fields_for :comments do |comment_fields| %> <%= comment_fields.text_area :content %> <% end %> <%= form.submit %> <% end %> ``` I've confirmed that the form is rendering correctly, but it seems like the comments aren't being recognized as valid when the post is saved. What might I be missing here? Any help would be greatly appreciated! I'm working on a CLI tool that needs to handle this. Is there a better approach? For context: I'm using Ruby on Ubuntu 20.04. For context: I'm using Ruby on Debian. Any examples would be super helpful. The project is a desktop app built with Ruby. Hoping someone can shed some light on this.