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I am trying to add comments withour refresh a page

When I try to add a comment, it doesnt append on table. When i refresh a page then it append. I dont know what is problem. I think I did everything well. There is no errors on page. And it goes in table whatever I add to table, but only after refresh a page.
show.html.erb
...
<table id="comments">
<tbody>
<% #article.comments.each do |comment| %>
<%= render 'comments/comment', comment: comment %>
<% end %>
</tbody>
...
_comment.html.erb
<tr>
<td><p><%= comment.name %></p></td>
<td><p><%= comment.body %></p></td>
<td><p><%= time_ago_in_words(comment.created_at) %> Ago</p></td>
<% if User.find_by(email: comment.name) == current_user %>
<td><%= link_to 'Delete', [comment.article, comment], method: :delete, data: { confirm: 'Are you sure?' } %></td>
<% else %>
<td> </td>
<% end %>
</tr>
create.js.erb
$('table#comments tbody').append("<%= j render #comment %>")
terminal
ActionController::UnknownFormat (ActionController::UnknownFormat):
app/controllers/comments_controller.rb:7:in `create'
routes.rb
Rails.application.routes.draw do
get 'search/index'
devise_for :users
get 'welcome/index'
get '/search', to: 'search#search'
resources :user
resources :articles do
resources :comments
member do
put "like" => "articles#like"
put "unlike" => "articles#unlike"
end
end
resources :search, only: [:index]
root 'welcome#index'
end
comments_controller.rb
def create
#article = Article.find(params[:article_id])
#comment = #article.comments.create(params[:comment].permit(:name, :body))
#comment.name = current_user.email
respond_to do |format|
if #comment.save
format.js
format.html { redirect_to #comment }
format.json { render :show, status: :created, location: #comment }
else
end
end
end

Because by default, format return from controller is html. So you need to add another formant js in controller to make js.erb work.

Your controller should be something like this:
def create
............
if #comment.save
respond_to do |format|
format.js
end
end
end
to handle the errors: in create.js.erb file, check #comment.errors.any? - then do whatever you want to do.

undefined method `company' for nil:NilClass

I keep receving an error on my home page saying
'undefined method `company' for nil:NilClass'
for the first line of the following code displayed below. I am not really sure on how to fix this. I have two Controllers for both companies and customers because I am creating a two-sided marketplace.
When the user clicks the logo at the top instead of being redirected to the welcome page, the login page is being rendered since the home page is the root_path but I am using devise for before_action authenticate is being used.
<% if((current_user.company) || (current_user.customer)) %>
<%= render 'pages/welcome' %>
<% else %>
<% if current_user.is_company %>
<%= render 'companies/form', company: #company%>
<% else %>
Here is the home.html.erb file with the code which is the root_path
<% if((current_user.company) || (current_user.customer)) %>
<%= render 'pages/welcome' %>
<% else %>
<% if current_user.is_company %>
<%= render 'companies/form', company: #company%>
<% else %>
<%= render 'customers/form', customer: #customer%>
<% end %>
<% end %>
Here is my companiesController
class CompaniesController < ApplicationController
before_action :set_company, only: [:show, :edit, :update, :destroy]
def index
#companies = Company.all
end
# GET /companies/1
# GET /companies/1.json
def show
#company = Company.find(params[:company_id])
end
# GET /companies/new
def new
#company = Company.new
end
# GET /companies/1/edit
def edit
end
# POST /companies
# POST /companies.json
def create
#company = Company.new(company_params)
respond_to do |format|
if #company.save
format.html { redirect_to #company, notice: 'Company was successfully created.' }
format.json { render :show, status: :created, location: #company }
else
format.html { render :new }
format.json { render json: #company.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /companies/1
# PATCH/PUT /companies/1.json
def update
respond_to do |format|
if #company.update(company_params)
format.html { redirect_to #company, notice: 'Company was successfully updated.' }
format.json { render :show, status: :ok, location: #company }
else
format.html { render :edit }
format.json { render json: #company.errors, status: :unprocessable_entity }
end
end
end
# DELETE /companies/1
# DELETE /companies/1.json
def destroy
#company.destroy
respond_to do |format|
format.html { redirect_to companies_url, notice: 'Company was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_company
#company = Company.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the
white list through.
def company_params
params.require(:company).permit(:username, :phone, :website, :street, :city, :state, :country, :user_id)
end
end

it just says that the current_user is nil, you need to make sure that the user is logged in to use current_user.company

The log is giving you details as to why the company is returning a nil. The company requires an object in it for the page to load properly. But that is not so because no user is logged in for the company to have an object to return.
<% if((current_user.company) || (current_user.customer)) %> <%=
render 'pages/welcome' %> <% else %>
<% if current_user.is_company %> <%= render 'companies/form',
company: #company%> <% else %>
is returning a nil because no user is logged in.
You can first check if there is a user logged in and then render
something before this to prevent the error page
<% if(current_user) <% if((current_user.company) ||
(current_user.customer)) %>
<%= render 'pages/welcome' %> <% else %>
<% if current_user.is_company %>
<%= render 'companies/form', company: #company%> <% end %> <% else %> render something here <% end %>
Or simply log in to make sure this does not return a nil. But the first fix is the most ideal.

Rails / Ajax - update action for comments partial not working

I'm building an events app using Rails 5.0 and have comments as a nested resource. Users can create and destroy comments, I'm trying to implement the edit/update function using Ajax/ remote: true so they can update a comment on the same page but it's not working. When I click on the edit link nothing happens. Here's the relevant code -
comments_controller.rb
class CommentsController < ApplicationController
before_action :set_comment, only: [:show, :edit, :update, :destroy]
def create
#event = Event.find(params[:event_id])
#comment = #event.comments.create(comment_params)
#comment.user_id = current_user.id
if #comment.save
redirect_to #event
else
render 'new'
end
end
# GET /comments/1/edit
def edit
#event = #comment.event
#comment = #event.comments.find(params[:id])
respond_to do |format|
format.html { render :edit }
format.js {}
end
end
def show
end
def update
if #comment.update(comment_params)
redirect_to #event, notice: "Comment was successfully updated!"
else
render 'edit'
end
respond_to do |f|
format.html { redirect_to #event, notice: "Comment Successfully updated!" }
format.js # render 'comments/update.js.erb'
end
end
def destroy
#event = Event.find(params[:event_id])
#comment = #event.comments.find(params[:id])
#comment.destroy
redirect_to event_path(#event)
end
private
def set_comment
#comment = Comment.find(params[:id])
end
def comment_params
params.require(:comment).permit(:name, :body)
end
end
_comment.html.erb
<div class="comment clearfix">
<div class="comment_content">
<div id="comments" class="comment">
<p id="comment_name"><strong><%= #comment.name %></strong></p>
<p id="comment_body"><%= #comment.body %></p>
</div>
<p><%= link_to 'Edit', edit_event_comment_path(comment.event), id: "comments", remote: true %></p>
<p><%= link_to 'Delete', comment.event,
method: :delete,
class: "button",
data: { confirm: 'Are you sure?' } %></p>
</div>
</div>
update.js.erb
$('#comments').append("<%= j render #comment %>");
edit.js.erb
$('#comments').html("<%= j render 'form' %>");
_form.html.erb
<%= simple_form_for([#event, #comment], remote: true) do |f| %>
<%= f.label :comment %><br>
<%= f.text_area :body %><br>
<br>
<%= f.button :submit, label: 'Add Comment', class: "btn btn-primary" %>
<% end %>
I've never implemented this action before using Ajax so I'm probably making a few schoolboy errors here. Any assistance appreciated.

You are calling edit method on controller with this
<%= link_to 'Edit', [comment.event, comment], id: "comment", remote: true %>
And you have no edit.js.erb
For updating your comment, you would have to create a form with it's action url pointing to your update method, and marking it as remote true. Then when you submit, it will reach update directly, there is no need to pass through edit method.
There is a method for creating forms with ajax option as default called form_with, you can check it's guide and documentation here:
http://guides.rubyonrails.org/working_with_javascript_in_rails.html#form-with
Updating answer after your question update
Your form would need to become something like this
<%= simple_form_for :comment, :url => "/events/#{comment.event_id}/comments/#{comment.id}", :method => :put do |f| %>
<%= f.label :comment %><br>
<%= f.text_area :body %><br>
<br>
<%= f.button :submit, label: 'Add Comment', class: "btn btn-primary" %>
<% end %>

Update nested form attribute with a iteration

I'm currently trying to use the nested form with cocoon, is awesome !! But I'm facing to an interrogation and I don't know which way I should take.
Relations :
Ranch have Cows
Ranch have Productions
Production have nested form Iproductions
What I'm trying to do now is implement my iteration |c| into each of my iproductions:cow_id elements
My code:
(My_form production)=
<%- #cows.each do |c| %>
<div class="row">
<div class="col-md-12">
<div id="Order">
<%= f.simple_fields_for :iproductions do |ip| %>
<%= render 'iproductions_fields', f: ip, cow: c %>
<%end%>
<div class="Order_links">
<%= link_to_add_association c.name, f, :iproductions, cow: c, class: "btn btn-default" %>
</div>
</div>
</div>
</div>
(My iproductions_fields)=
<div class="form-inline clearfix">
<div class="nested-fields">
<%= f.input :cow_id, :input_html => { :cow_id => :cow } %>
<%= f.input :quantity, input_html: {class: "form-input form-control"} %>
<%= link_to_remove_association "Supprimer", f, class: "form-button btn btn-default" %>
</div>
</div>
(My productions_controllers)=
class ProductionsController < ApplicationController
before_action :authenticate_user!
skip_before_action :configure_sign_up_params
before_action :set_ranch
before_action :set_production, except: [:create, :new, :show]
before_action :set_production2, only: [:show]
# GET /productions
# GET /productions.json
def index
#productions = Production.all
end
# GET /productions/1
# GET /productions/1.json
def show
#iproductions = Iproduction.where(id: params[:production_id])
end
# GET /productions/new
def new
#production = #ranch.productions.build
#cows = #ranch.cows
end
# GET /productions/1/edit
def edit
#cows = #ranch.cows
end
# POST /productions
# POST /productions.json
def create
#production = #ranch.productions.create(production_params)
#production.update(date: Date.today)
#cows = #ranch.cows
respond_to do |format|
if #production.save
format.html { redirect_to ranch_production_path(#production.ranch_id, #production), notice: 'Production was successfully created.' }
format.json { render :show, status: :created, location: #production }
else
format.html { render :new }
format.json { render json: #production.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /productions/1
# PATCH/PUT /productions/1.json
def update
respond_to do |format|
if #production.update(production_params)
format.html { redirect_to ranch_production_path(#production.ranch_id, #production), notice: 'Production was successfully updated.' }
format.json { render :show, status: :ok, location: #production }
else
format.html { render :edit }
format.json { render json: #production.errors, status: :unprocessable_entity }
end
end
end
# DELETE /productions/1
# DELETE /productions/1.json
def destroy
#production.destroy
respond_to do |format|
format.html { redirect_to ranch_productions_path(#production.ranch_id), notice: 'Production was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_ranch
#ranch = Ranch.find(params[:ranch_id])
end
def set_production2
#production = Production.find_by(id: params[:id])
end
def set_production
#production = #ranch.productions.find_by(id: params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def production_params
params.require(:production).permit(:name, :ranch_id, :created_at, :date, iproductions_attributes: [:id, :date, :cow_id, :quantity, :_destroy])
end
end
My real view , so I would like to Assign each iproduction with the button which generate the iproductions_fields
So if you have any idea of which way I can try to achieve this goal, you're welcome,
Thanks in advance

Ajax and Rails Completed 406 Not Acceptable

I'm completely lost as to how to make this request go through ajax without throwing back a 406 error. I am trying to add an item to a cart with ajax, and the item does get added and after a refresh the cart is updated. All I receive as an xhr notice with the 406 error. Any help is highly appreciated.
Product Controller
class ProductsController < ApplicationController
def index
#products = Shoppe::Product.root.ordered.includes(:product_categories, :variants)
#products = #products.group_by(&:product_category)
end
def show
#product = Shoppe::Product.root.find_by_permalink(params[:permalink])
end
def buy
#product = Shoppe::Product.root.find_by_permalink!(params[:permalink]) || params[:variant] ? Shoppe::Product.root.find_by_permalink!(params[:permalink]).variants.find(params[:variant].to_i) : #product
current_order.order_items.add_item(#product, 1)
respond_to do |format|
format.js
end
end
end
Show.html.erb
<h2><%= #product.name %></h2>
<% if #product.default_image %>
<%= image_tag #product.default_image.path, :width => '200px', :style => "float:right" %>
<% end %>
<p><%= #product.short_description %></p>
<p>
<% if #product.has_variants? %>
<% #product.variants.each do |v| %>
<%= form_tag product_path(#product.permalink, #product.permalink, :variant => v.id ),id: '#submit-form', remote: true do %>
<%= submit_tag 'Add to basket', :disabled => !v.in_stock? %>
<% end %>
<% end %>
<% else %>
<b><%= number_to_currency #product.price %></b>
<%= link_to "Add to basket", product_path(#product.permalink), :method => :post %>
<% end %>
</p>
<hr>
<%= simple_format #product.description %>
<hr>
<p><%= link_to "Back to list", root_path %></p>
routes.rb
Rails.application.routes.draw do
mount Shoppe::Engine => "/admin"
get "product/:permalink", to: "products#show", as: "product"
post "product/:permalink", to: "products#buy", as: "buy"
get "basket", to: "orders#show"
delete "basket", to: "orders#destroy"
root to: "products#index"
end
products.js.erb
$(document).ready(function() {
var data = $('#submit-form').attr('action')
$.ajax({
type: 'POST',
url: data
});
});

Looking up what format.js does, I found this: rails respond_to format.js API
It seems format.js in your buy action will render the buy.js file. You haven't shown this file, so I'm figuring it doesn't exist.
I'm figuring what you're trying to do is render json, which is simple enough. You could replace:
respond_to do |format|
format.js
end
with this:
render json: <your object>.to_json
make sure to strip any private data before sending the response.
By the way, you should probably be attaching a callback to your $.ajax call.