Rails 7.1: implementing Nested Forms and Dynamic Fields Not Saving Properly
I'm reviewing some code and I'm working on a Rails 7.1 application where I have a nested form for a `Project` that has many `Tasks`. I've implemented dynamic fields for adding tasks to the project using JavaScript, but I'm running into issues where the tasks are not saving correctly when I submit the form. Here's a simplified version of my form: ```erb <%= form_with model: @project do |f| %> <%= f.text_field :name %> <div id="tasks"> <%= f.fields_for :tasks do |task_fields| %> <%= task_fields.text_field :description %> <%= link_to 'Remove', '#', class: 'remove_task' %> <% end %> </div> <%= link_to 'Add Task', '#', id: 'add_task' %> <%= f.submit %> <% end %> ``` I have set up JavaScript to handle adding new task fields dynamically: ```javascript document.addEventListener('DOMContentLoaded', () => { document.getElementById('add_task').addEventListener('click', function(event) { event.preventDefault(); let newTask = document.createElement('div'); newTask.innerHTML = `<input type='text' name='project[tasks_attributes][][description]' /> <a href='#' class='remove_task'>Remove</a>`; document.getElementById('tasks').appendChild(newTask); }); document.getElementById('tasks').addEventListener('click', function(event) { if (event.target.classList.contains('remove_task')) { event.preventDefault(); event.target.parentElement.remove(); } }); }); ``` However, when I submit the form, the project saves, but the tasks are coming back empty in the database. I checked the parameters being sent in the request, and it looks like the tasks are not being properly nested. The logs show something like this: ``` Parameters: {project: {name: 'New Project', tasks_attributes: [{description: ''}, {description: ''}]}} ``` It seems that despite adding the dynamic fields, the `tasks_attributes` array is not getting populated correctly. I've tried making sure that my `Project` model accepts nested attributes for `tasks`: ```ruby class Project < ApplicationRecord has_many :tasks accepts_nested_attributes_for :tasks, allow_destroy: true end ``` I've also verified that I'm using strong parameters in my controller: ```ruby def project_params params.require(:project).permit(:name, tasks_attributes: [:id, :description, :_destroy]) end ``` Could anyone give me insight into what I might be missing or how to debug this scenario? I've been exploring for a while trying to figure it out. For context: I'm using Ruby on Debian. Thanks for any help you can provide!