Rails 7.1 - implementing ActiveStorage file attachments not saving with nested attributes
I need some guidance on I'm following best practices but Hey everyone, I'm running into an issue that's driving me crazy. I’m working with a frustrating scenario when trying to save an ActiveStorage attachment with nested attributes in Rails 7.1. I have a `Post` model that has many `Comments`, and each `Comment` can have a file attachment. When I submit the form, the `Post` saves correctly, but the associated `Comment` attachments don't seem to save. Here's a simplified version of my models: ```ruby class Post < ApplicationRecord has_many :comments, dependent: :destroy accepts_nested_attributes_for :comments end class Comment < ApplicationRecord belongs_to :post has_one_attached :file end ``` In my form, I’m using fields for `comments_attributes`: ```erb <%= form_with(model: @post) do |form| %> <%= form.fields_for :comments do |comment_fields| %> <%= comment_fields.label :content %> <%= comment_fields.text_area :content %> <%= comment_fields.label :file %> <%= comment_fields.file_field :file %> <% end %> <%= form.submit 'Save Post' %> <% end %> ``` When I check the logs, I see the following behavior after the form submission: ``` ActiveStorage::IntegrityError: The uploaded file is invalid. ``` I’ve confirmed that the files I’m trying to upload are valid and I have also tested uploading them directly to a `Comment` separately, which works fine. I’ve tried adding `accepts_nested_attributes_for :file` to the `Comment` model, but that didn’t solve the scenario. Additionally, I've checked that the file parameter is properly nested in the submitted params. Here’s an example of what I see in `params`: ```ruby { "post": { "comments_attributes": [ { "content": "This is a comment", "file": "[object File]" } ] } } ``` I would appreciate any guidance on how to correctly handle file attachments with nested attributes in this context. I'm working on a service that needs to handle this. I'm working on a web app that needs to handle this. What are your experiences with this? My development environment is macOS.