Nested form submission in Rails 7.1 implementation guide associated records correctly
I'm working through a tutorial and Hey everyone, I'm running into an issue that's driving me crazy... I'm working with an scenario with nested form submissions in Rails 7.1. I have a `Project` model that has many `Tasks` and I'm trying to update the tasks through the project form. The form looks like this: ```erb <%= form_with model: @project do |f| %> <%= f.label :name %> <%= f.text_field :name %> <%= f.fields_for :tasks do |task_fields| %> <%= task_fields.label :description %> <%= task_fields.text_field :description %> <% end %> <%= f.submit 'Update Project' %> <% end %> ``` In my `ProjectsController`, I have: ```ruby def update @project = Project.find(params[:id]) if @project.update(project_params) redirect_to @project, notice: 'Project was successfully updated.' else render :edit end end private def project_params params.require(:project).permit(:name, tasks_attributes: [:id, :description, :_destroy]) end ``` When I submit the form, the project name updates correctly, but the associated tasks don't. I checked the logs and it seems like the tasks are not being recognized by ActiveRecord. I even tried adding `accepts_nested_attributes_for :tasks` in the `Project` model: ```ruby class Project < ApplicationRecord has_many :tasks accepts_nested_attributes_for :tasks, allow_destroy: true end ``` However, I still get the following message in the console when I submit the form: `ActiveRecord::RecordInvalid: Validation failed: Tasks is invalid`. I've confirmed that the task IDs are being passed in the parameters, but it seems that they aren't matching any existing records. I also tried debugging by printing out `params[:project][:tasks_attributes]` in the controller, and the output looks correct: ```ruby { "0" => { "id" => "1", "description" => "Updated task description" }, "1" => { "id" => "2", "_destroy" => "0" } } ``` I've also looked into potential validation issues on the `Task` model, but everything seems fine. Any ideas on why the tasks aren't being updated as expected? I'm wondering if there might be something I'm missing with the nested attributes or the way Rails is processing the form submission. How would you solve this? How would you solve this? I'm using Ruby stable in this project. Thanks, I really appreciate it!