👀 Views: 88 💬 Answers: 1 📅 Created: 2025-06-06

ruby rails activerecord nested-attributes Ruby

I'm attempting to set up I'm working on a project and hit a roadblock. I'm testing a new approach and After trying multiple solutions online, I still can't figure this out. I'm working with a question when trying to save nested attributes in Rails 6. I have a `Post` model that accepts nested attributes for `Comment`. In my controller, I'm using strong parameters, but I'm getting a `ActiveRecord::RecordInvalid` behavior when trying to save the `Post` with its associated `Comment`. Here’s the relevant code: ```ruby class Post < ApplicationRecord has_many :comments accepts_nested_attributes_for :comments validates :title, presence: true end class Comment < ApplicationRecord belongs_to :post validates :content, presence: true end ``` In my `PostsController`, I have: ```ruby class PostsController < ApplicationController def create @post = Post.new(post_params) if @post.save redirect_to @post, notice: 'Post was successfully created.' else render :new end end private def post_params params.require(:post).permit(:title, comments_attributes: [:content]) end end ``` When I submit the form, I see this behavior: `ActiveRecord::RecordInvalid in PostsController#create`. It highlights that `content` can’t be blank, but I am providing it through nested attributes. I’ve checked the parameters being sent, and they look like this: ```json { "post": { "title": "My New Post", "comments_attributes": [{ "content": "This is a comment" }] } } ``` I’ve also tried using `byebug` to inspect `@post.errors.full_messages`, and it returns `"Content need to be blank"`, despite it being in the parameters. It seems like the nested attributes aren’t being processed correctly. I suspect it might be due to custom validation methods that I didn't include here, but I need to pinpoint the scenario. Any advice on how to resolve this and successfully save the `Post` with its associated `Comment`? Has anyone else encountered this? Is there a simpler solution I'm overlooking?