Ruby on Rails Partial Locals - ruby-on-rails

Question

On my site users can both take and retake a quiz, meaning I will use the quiz code in a partial view that will be used both by the the edit and new views.
To render my partials I have in my new view:
<%= render partial: "quiz", locals: { url: quiz_bs_path } %>
and in my edit view:
<%= render partial: "quiz", locals: { url: edit_quiz_b_path } %>
The link_to locations are from my rake routes results:
quiz_bs GET /quiz_bs(.:format) quiz_bs#index
POST /quiz_bs(.:format) quiz_bs#create
new_quiz_b GET /quiz_bs/new(.:format) quiz_bs#new
edit_quiz_b GET /quiz_bs/:id/edit(.:format) quiz_bs#edit
quiz_b GET /quiz_bs/:id(.:format) quiz_bs#show
PATCH /quiz_bs/:id(.:format) quiz_bs#update
PUT /quiz_bs/:id(.:format) quiz_bs#update
DELETE /quiz_bs/:id(.:format) quiz_bs#destroy
I am getting an Argument Error in my edit view saying First argument in form cannot contain nil or be empty. The line on which the error is being called is in my partial:
<%= form_for #quiz_bs, url: url, method: :post do |f| %>
My controller code is:
class QuizBsController < ApplicationController
before_action :require_sign_in
def show
#quiz_bs = QuizBs.find(params[:id])
end
def new
#quiz_bs = current_user.quiz_bs || current_user.build_quiz_bs
end
def create
#quiz_bs = QuizBs.new
#quiz_bs.bs01 = params[:quiz_bs][:bs01]
#quiz_bs.bs02 = params[:quiz_bs][:bs02]
#quiz_bs.bs03 = params[:quiz_bs][:bs03]
#quiz_bs.bs04 = params[:quiz_bs][:bs04]
#quiz_bs.bs05 = params[:quiz_bs][:bs05]
#quiz_bs.bs06 = params[:quiz_bs][:bs06]
#quiz_bs.user = current_user
if #quiz_bs.save
flash[:notice] = "Quiz results saved successfully."
redirect_to user_path(current_user)
else
flash[:alert] = "Sorry, your quiz results failed to save."
redirect_to welcome_index_path
end
end
def update
#quiz_bs = QuizBs.find(params[:quiz_bs])
#quiz_bs.assign_attributes(quiz_bs_params)
if #quiz_bs.save
flash[:notice] = "Post was updated successfully."
redirect_to user_path(current_user)
else
flash.now[:alert] = "There was an error saving the post. Please try again."
redirect_to welcome_index_path
end
end
private
def quiz_bs_params
params.require(:quiz_bs).permit(:bs01, :bs02, :bs03, :bs04, :bs05, :bs06)
end
end
The model is:
class QuizBs < ActiveRecord::Base
before_save :set_bscode
def set_bscode
self.bscode = "#{self.bs01}#{self.bs02}#{self.bs03}-#{self.bs04}#{self.bs05}#{self.bs06}"
end
belongs_to :user
validates :user, presence: true
end
Any ideas where I am going wrong?

Answer 1

Keep it more simple, if you want to assign to current_user, create method will do for you.
Partial:
#new.html.erb
<%= render partial: "quiz", locals: {quiz: #quiz_bs, url: :quiz_bs } %>
#edit.html.erb
<%= render partial: "quiz", locals: {quiz: #quiz_bs, url: :quiz_b } %>
Form:
#_form.html.erb
<%= form_for quiz, url: url do |f| %>
Controller:
def new
#quiz_bs = QuisBs.new
end

Answer 2

You do not have edit action in controller, so rails assumes it being empty. Thus #quiz_bs is really nil
Add something like
def edit
#quiz_bs = QuizBs.find(params[:id])
end
also in your update action params[:quiz_bs] is most likely nil too and should be changed to params[:id]

Answer 3

It is not necessary to create RESTfull methods in controller but if you are using it as I can see #quiz_bs then you will have to initialize it first then you can use it, In your new view you initialize the #quiz_bs by
#quiz_bs = current_user.quiz_bs || current_user.build_quiz_bs
then you are using it.
and also routes which is generated for edit is needed an id i.e.
edit_quiz_b GET /quiz_bs/:id/edit(.:format) quiz_bs#edit
so you will have to pass #quiz_bs like
edit_quiz_b_path(#quiz_bs)
GOT it?

Answer 4

Some updates to your controller:
before_action :assign_quiz_bs, only: [:show, :edit, :update, :destroy]
#...
def update
#quiz_bs.update(quiz_bs_params)
# .... rendering ...
end
private
def assign_quiz_bs
#quiz_bs = Quiz.find(params[:id])
end
def quiz_bs_params
params.require(:quiz_bs).permit(:bs01, :bs02, :bs03, :bs04, :bs05, :bs06)
end