Pfthb

I'm working on a Rails 5.2 application requiring the storing of a Quote, and one QuoteLineItem to go wwith it (Quote has_one :quote_line_item, QuoteLineItem belongs_to :quote). I've set it all up according to documentation, however when submitting the quotes#edit for (which contains fields_for @quote.quote_line_item...), the values for the Quote record are updated in the database, however values for the QuoteLineItem are not. No error is thrown on submission, and no "Unpermitted params..." message in server logs.

Quote Model

class Quote < ApplicationRecord
 has_one :quote_line_item, inverse_of: :quote, dependent: :destroy
 accepts_nested_attributes_for :quote_line_item, update_only: true
end

QuoteLineItem Model

class QuoteLineItem < ApplicationRecord
 belongs_to :quote, inverse_of: :quote_line_item, touch: true
end

Quotes Controller

class QuotesController < ApplicationController
 def update
 @quote = Quote.find(params[:id])

 if @quote.update(quote_params)
 flash[:success] = "Quote was successfully updated."
 redirect_to @quote
 else
 flash[:error] = "Quote was not updated. Please try again."
 render :edit
 end
 end

 private
 def quote_params
 params.require(:quote).permit(:issued_at, quote_line_item_attributes: [ :kind, :description, :price ])
 end
end

Quotes Edit View

<%= form_for @quote do |quote_form| %>
 <% if @quote.errors.any? %>
 <div id="error_explanation">
 <h2><%= pluralize(@quote.errors.count, "error") %> prohibited this quote from being saved:</h2>

 <ul>
 <% @quote.errors.full_messages.each do |message| %>
 <li><%= message %></li>
 <% end %>
 </ul>
 </div>
 <% end %>

 <%= quote_form.label :issued_at %>
 <%= quote_form.datetime_field :issued_at %>

 <%= fields_for :quote_line_item, @quote.quote_line_item do |quote_line_item_fields| %>
 <%= quote_line_item_fields.label :description %><br>
 <%= quote_line_item_fields.text_field :description %>

 <%= quote_line_item_fields.label :price %>
 <%= quote_line_item_fields.number_field :price, step: :any %>
 <% end %>
<% end %>

Server Logs

Started PATCH "/quotes/62" for 127.0.0.1 at 2018-11-12 13:01:46 +0800
Processing by QuotesController#update as HTML
 Parameters: "utf8"=>"✓", "authenticity_token"=>"bVa+vhRayuPDhe5xkLcK2rm10zQ9oHvtDSZsKDhMBsdX/JDjf6uXsnIJ7gM/yP7Lt9E+aBGIR9WCoLU2uNhgVQ==", "quote"=>"issued_at"=>"12/11/2018 11:05 AM", "quote_line_item"=>"description"=>"QuoteLineItem description goes here...", "price"=>"800.00", "commit"=>"Save", "id"=>"62"
 Quote Load (3.8ms) SELECT `quotes`.* FROM `quotes` WHERE `quotes`.`id` = 62 LIMIT 1
 ↳ app/controllers/quotes_controller.rb:127
 (0.7ms) BEGIN
 ↳ app/controllers/quotes_controller.rb:53
 (3.6ms) COMMIT
 ↳ app/controllers/quotes_controller.rb:53
Redirected to http://localhost:3000/quotes/62
Completed 302 Found in 44ms (ActiveRecord: 9.3ms)

Is there a reason this shouldn't be working?

Thanks.

Try referencing quote_form before your fields_for:

<%= form_for @quote do |quote_form| %>

 ...

 <%= quote_form.fields_for :quote_line_item do |quote_line_item_fields| %>
 # ^ <- Add here

 ...

 <% end %>
<% end %>

After updating this, check that the parameters being passed to quotes#edit are nested:

i.e: "quote"=>"issued_at"=>"12/11/2018 11:05 AM", "quote_line_item"=>"description"=>"Line item description goes here...", "price"=>"200.00", "id"=>"63"