Rails 7: Difficulty Handling Nested Form Submissions with Custom scenarios Messages in a Multi-Step Wizard
I'm testing a new approach and I'm writing unit tests and Can someone help me understand I tried several approaches but none seem to work..... I've been struggling with this for a few days now and could really use some help. I'm currently implementing a multi-step form wizard using Rails 7, where users can submit a series of nested forms that are related to a single main model. The main model has a has_many relationship with a nested model. However, I'm struggling with displaying custom behavior messages for each nested form during validations when navigating through the wizard steps. For instance, when a user submits the nested forms, if there are validation failures in the nested model, I want to show specific behavior messages for each nested form in the respective step of the wizard. However, I'm finding that when there are validation errors, the custom messages are not being displayed correctly, and the errors seem to be lost upon rendering the next step. I've set up my models like this: ```ruby class User < ApplicationRecord has_many :addresses accepts_nested_attributes_for :addresses, allow_destroy: true end class Address < ApplicationRecord belongs_to :user validates :street, presence: { message: 'Street address is required' } validates :city, presence: { message: 'City is required' } end ``` In my controller, I'm processing the nested forms like this: ```ruby class UsersController < ApplicationController def update @user = User.find(params[:id]) if @user.update(user_params) # Proceed to next step redirect_to next_step_path else # Render the current step with errors render :edit end end private def user_params params.require(:user).permit(:name, addresses_attributes: [:id, :street, :city, :_destroy]) end end ``` In my view, I am trying to display errors like this: ```erb <% @user.addresses.each do |address| %> <%= form.fields_for :addresses, address do |address_fields| %> <%= address_fields.text_field :street %> <%= address_fields.error_message_on(:street) %> <%= address_fields.text_field :city %> <%= address_fields.error_message_on(:city) %> <% end %> <% end %> ``` Despite this setup, when there are validation errors, they don't seem to continue across redirects or render properly. Instead, I just see a blank form without any errors on the fields. I tried resetting the `@user` instance variable after an update attempt, but that didn’t help. Any insights on how to maintain the context of behavior messages for nested forms across multiple steps in a wizard would be greatly appreciated. Is there a better approach to handle this kind of scenario in Rails 7? This is part of a larger application I'm building. Has anyone else encountered this? I'm working on a API that needs to handle this. I recently upgraded to Ruby stable. I'm working in a macOS environment. I'm developing on Debian with Ruby.