Rails 5 - Strong Parameters for Nested Attributes - ruby-on-rails

Question

I am having trouble structuring my nested attributes for my model Request.
The data is being passed in the correct way from my POST action.
What am I missing to whitelist these parameters?
Appreciate any help.
Console Output
Started POST "/requests" for 127.0.0.1 at 2017-06-08 10:57:15 -0400
Processing by RequestsController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"fmvhoPxVpcHoqOd32mO/HJMrfaPUd+KbNqDJiSRs78U44Y0uL3prpTfU6wmw7PAwv0b+mRHXOGMLvD9bsZpxnw==", "request"=>{"concierge_name"=>"Alex", "concierge_number"=>"954-123-4567", "concierge_email"=>"alex#email.com", "client_name"=>"Adam", "client_number"=>"954-765-4321", "client_email"=>"adam#email.com", "hotel_employee"=>"0", "concierge_service"=>"0", "vip_promoter"=>"0", "arriving_with_client"=>"1", "client_alone"=>"0", "males"=>"", "females"=>"1", "table_minimum"=>"1000", "arrival_time(1i)"=>"2017", "arrival_time(2i)"=>"6", "arrival_time(3i)"=>"8", "arrival_time(4i)"=>"14", "arrival_time(5i)"=>"56", "table_location_ids"=>["1"], "drink_attributes"=>[{"id"=>"1", "quantity"=>"1"}, {"id"=>"2", "quantity"=>""}, {"id"=>"3", "quantity"=>""}, {"id"=>"4", "quantity"=>""}], "chaser_ids"=>["1"], "comments"=>""}, "commit"=>"Submit"}
Completed 500 Internal Server Error in 8ms (ActiveRecord: 0.0ms)
ActiveModel::UnknownAttributeError (unknown attribute 'drink_attributes' for Request.):
app/models/request.rb
class Request < ApplicationRecord
has_many :request_drinks
has_many :drinks, through: :request_drinks
accepts_nested_attributes_for :drinks
end
app/model/drink.rb
class Drink < ApplicationRecord
has_many :request_drinks
has_many :requests, through: :request_drinks
end
app/model/request_drink.rb
class RequestDrink < ApplicationRecord
belongs_to :request
belongs_to :drink
end
app/controllers/request_controller.rb
class RequestsController < ApplicationController
before_action :set_request, only: [:show,
:edit,
:update,
:destroy]
def index
#requests = Request.search(params[:term], params[:filter], params[:page])
end
def show
end
def new
#request = Request.new
#drinks = Drink.active
end
def edit
end
def create
#request = Request.new(request_params)
respond_to do |format|
if #request.save
format.html { redirect_to thanks_path, notice: 'Request was successfully created.' }
format.json { render :show, status: :created, location: #request }
else
format.html { render :new }
format.json { render json: #request.errors, status: :unprocessable_entity }
end
end
end
def update
respond_to do |format|
if #request.update(request_params)
format.html { redirect_to #request, notice: 'Request was successfully updated.' }
format.json { render :show, status: :ok, location: #request }
else
format.html { render :edit }
format.json { render json: #request.errors, status: :unprocessable_entity }
end
end
end
def destroy
#request.destroy
respond_to do |format|
format.html { redirect_to requests_url, notice: 'Request was successfully destroyed.' }
format.json { head :no_content }
end
end
private
def set_request
#request = Request.find(params[:id])
end
def request_params
params.require(:request).permit(:concierge_name,
:concierge_number,
:concierge_email,
:client_name,
:client_number,
:client_email,
:hotel_employee,
:concierge_service,
:vip_promoter,
:arriving_with_client,
:client_alone,
:people,
:males,
:females,
:table_minimum,
:arrival_time,
:comments,
:drink_attributes => [:id, :quantity]
)
end
end
app/views/requests/_form.html.erb
...
<div class="field-3">
<h4>Drinks</h4>
<% #drinks.all.each do |d| %>
<%= hidden_field_tag "request[drink_attributes][][id]", d.id %>
<%= number_field_tag "request[drink_attributes][][quantity]" %>
<%= d.name %>
<br />
<% end %>
</div>
...

Answer 1

You need to use the plural form of the object (i.e. drinks) when using nested attributes.
So, in your request_params change:
:drink_attributes => [:id, :quantity]
to:
:drinks_attributes => [:id, :quantity]
An you need to update your form too:
...
<%= hidden_field_tag "request[drinks_attributes][][id]", d.id %>
<%= number_field_tag "request[drinks_attributes][][quantity]" %>
...