Rails Join Table Nested form_for

Question

I'm learning Rails building an ordering system and I'm stuck trying to build a form for Orders. Where Orders is a nested resource for Restaurant. Routes:

resources :restaurants do
    resources :orders
    resources :recipes
end

My models look like this:

class Restaurant < ActiveRecord::Base
    has_many :orders
    has_many :recipes, dependent: :destroy
end

class Order < ActiveRecord::Base
    belongs_to :restaurant
    has_many :order_recipes, dependent: :destroy
    has_many :recipes, through: :order_recipes
end

class Recipe < ActiveRecord::Base
    belongs_to :restaurant
    has_many :order_recipes
    has_many :orders, through: :order_recipes
end

My controller:

        @recipes = @restaurant.recipes
        @order_recipes = @recipes.map{|r| @order.order_recipes.build(recipe: r)}

And my view:

<%= form_for([@restaurant, @order]) do |order_form| %>
        <%= order_form.label :Table_Number %>
        <%= order_form.number_field :table_id %>

        <%= order_form.fields_for :order_recipes, @order_recipes do |orf| %>
        <%= order_form.hidden_field :recipe_ids %>
        <%= order_form.label Recipe.where(id: :recipe_id) %>
        <%= orf.number_field :quantity %>

My current problem is displaying the names of each recipe. It seems that :recipe_id is being passed as null all the time. My ultimate goal is to be able to build order_recipes populating the quantity column, and I thought having the recipe_id from order_recipes I could also access the correct recipe object from the DB to display the name or any other relevant data.

Nope, its in there. Btw, this answer works for me, at least for the form. Still struggling with the parameter passing.(http://stackoverflow.com/questions/25235025/rails-4-accessing-join-table-attributes) — Patricio Jerí, Aug 02 '15 at 16:31

Ojash · Answer 1 · 2015-08-02T16:38:13.907

0

I assumed, you have a restaurant, it has recipes, it takes orders, orders are tracked by order_recipes table.

# controller
@recipes = @restaurant.recipes
@order = @recipes.map{|r| r.order.build}

# view
<%= form_for([@restaurant, @order]) do |order_form| %>
  ...
  <% @order.each do |index, ord| %>
    <%= order_form.fields_for :orders, @order do |orf| %>
      ...
      <%= order_form.label @recipes[index] %>
      <%= orf.number_field :quantity %>

# also in restaurant model
accepts_nested_attributes_for :orders

edited Aug 02 '15 at 16:38

answered Aug 02 '15 at 15:36

Ojash

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Sorry, forgot to include that line. Edited above to reflect actual code. – Patricio Jerí Aug 02 '15 at 15:59
Could you also post your routes file. – Ojash Aug 02 '15 at 16:14
Edited Question - But its just a normal nested resource. :) Also, I've started to use the answer provided in this question, but to no success yet: http://stackoverflow.com/questions/25235025/rails-4-accessing-join-table-attributes – Patricio Jerí Aug 02 '15 at 16:17

score 0 · Answer 2 · answered Aug 02 '15 at 15:47

0

try so in your controller:

@order_recipes = @recipes.map{|r| @order.build_order_recipes(recipe: r)}

answered Aug 02 '15 at 15:47

Pierangelo Orizio

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score 0 · Answer 3 · edited May 23 '17 at 10:26

0

Eventually I got this the answer posted in this question to work: Rails 4 Accessing Join Table Attributes I'm only struggling with passing the correct parameters now, but the form is correct.

edited May 23 '17 at 10:26

Community

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answered Aug 02 '15 at 16:30

Patricio Jerí

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Rails Join Table Nested form_for

3 Answers3