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Have filed entry populate fields in two tables - Nested Forms?

Simon Cooper asked in Rails

I have two models, Gins and Distillery. At the moment, these are two completely seperate models, but I have been thinking that as a user adds a a new Gin and inputs it's distillery, this could also create a new entry in the Distillary table. Obviously Gin would then belong_to distillery and Distillery would has_many Gins. Looking around it seems a nested form could be the solution, but would that actually add the distillery value into both forms/tables. I haven't actually been able to get this to work, as the Distillary field in thh Gins form, wouldn't render

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Hey Simon,

From first glance it looks like you may want to use something like Cocoon if you haven't tried that?

If you have code samples it may help more. I tend to have an easier time reasoning about things when there's code in front of me and it's not as abstract.

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Absolutely Andrew. Here's what I have. An update from the above, is that I now have the 'distillery' field showing in the new form, but when I submit the form, i get the error:

Distillery must exist

views/gins/_form.html.erb

<%= form_for(@gin, local: true, multipart: true) do |form| %>
//some fields removed

  <div class="input-field">
    <%= form.fields_for :distillery do |distillery_form| %>
      <p>
        <%= distillery_form.label :distillery %>
        <%= distillery_form.text_field :name %>
      </p>
    <% end %>
  </div>
//some fields removed

models/gins.rb

class Gin < ApplicationRecord
  belongs_to :distillery

models/distilleries/distillery.rb

class Distillery < ApplicationRecord
  has_many :gins
  accepts_nested_attributes_for :gins

controllers/gin_controlller.rb

    def gin_params
      params.require(:gin).permit(:name, :text, :pic, :slug, distillery_attributes: [:id, :name])
    end
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