👀 Views: 95 💬 Answers: 1 📅 Created: 2025-06-05

ruby-on-rails nested-attributes strong-parameters ruby

I can't seem to get I'm trying to debug I'm sure I'm missing something obvious here, but I'm relatively new to this, so bear with me. I've looked through the documentation and I'm still confused about I've looked through the documentation and I'm still confused about I'm working on a Rails 7 application that uses nested attributes for a `Project` model which accepts attributes from an associated `Task` model... I've defined my models like this: ```ruby class Project < ApplicationRecord has_many :tasks, dependent: :destroy accepts_nested_attributes_for :tasks, allow_destroy: true end class Task < ApplicationRecord belongs_to :project end ``` In my controller, I'm trying to permit nested attributes using strong parameters: ```ruby class ProjectsController < ApplicationController def project_params params.require(:project).permit(:name, tasks_attributes: [:id, :title, :_destroy]) end def create @project = Project.new(project_params) if @project.save redirect_to @project, notice: 'Project was successfully created.' else render :new end end end ``` When I try to create a new project with nested task attributes, I keep getting an `ActiveModel::ForbiddenAttributesError` for the `tasks_attributes`. Here's the JSON payload I'm sending: ```json { "project": { "name": "New Project", "tasks_attributes": [ {"title": "First Task"}, {"title": "Second Task"} ] } } ``` I've confirmed that the `tasks_attributes` is being sent in the request, but it seems like the strong parameters are not recognizing it. I've tried changing the parameters method to include the `tasks_attributes` directly under `permit`, but that hasn't resolved the scenario either. I've also printed out `project_params` in the logs to ensure it is correctly structured: ```ruby Rails.logger.debug project_params.inspect ``` The output looks fine, but the behavior continues. What am I missing? How can I successfully create a project with nested tasks in Rails 7 without running into this `ActiveModel::ForbiddenAttributesError`? Is there a better approach? This is part of a larger application I'm building. This is part of a larger CLI tool I'm building. I'd really appreciate any guidance on this. The project is a application built with Ruby. Thanks, I really appreciate it! The project is a REST API built with Ruby. What's the best practice here? Is there a simpler solution I'm overlooking? I'm using Ruby latest in this project. Any suggestions would be helpful.