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Rails AJAX Destroy - Re-render index issues

I have an issue with a Rails AJAX app which is confusing me, even though it seems very simple! I am dealing with class Order in a simple point of sale rails app. The request is being made as the order will be deleted on page refresh (but I am getting no refresh of #orders) as I thought I am specifying in destroy.js.erb.
orders/index.html
<div id="orders">
<%= render 'orders/index' %>
</div>
<%= link_to 'New Order', new_order_path, remote: true %>
<div id="order-form" style="display:none;"></div>
orders/_index.html
<% if #orders.any? %>
<% #orders.each do |order| %>
<%= link_to "Show #{order.id}", order_path(order), class: "something" %>
<%= link_to "Delete #{order.id}", order_path(order), method: :delete, class: "something" %>
<%= link_to "Delete order with ajax", order_path(order), remote: true, method: :delete %>
<% end %>
<% else %>
<p>No orders yet</p>
<% end %>
destroy.js.erb
//When deleting order on order index - render orders again.
$('#orders').html("<%= j (render 'orders/index') %>");
and the relevant actions from orders_controller.rb
class OrdersController < ApplicationController
respond_to :html, :js
def index
#orders = Order.paginate(page: params[:page])
if params[:search]
#orders = Order.search(params[:search]).order("created_at DESC")
else
#orders = Order.all.order('created_at DESC')
end
end
def destroy
#order = Order.find(params[:id])
if #order.destroy
flash[:notices] = ["Order was successfully deleted"]
redirect_to orders_path
else
flash[:notices] = ["Order could not be deleted"]
render order_path(#order)
end
end
I suspect the issue is in my orders_controller destroy or index action, but I am a little unclear on a number of the ways of working with AJAX in Rails.
Link to repo - https://github.com/benhawker/point-of-sale-rails

Might be because after your destroy you're redirecting to the index path

I am getting no refresh of #orders
Your JS is likely not firing, you'll need the following:
def destroy
#order = Order.find params[:id]
respond_to do |format|
if #order.destroy
format.js
format.html { redirect_to orders_path, notice: "Order was successfully deleted" }
else
format.js
format.html { render order_path(#order), notice: "Order could not be deleted" }
end
end
end
This will fire app/views/orders/destroy.js.erb, which seems okay in your OP.

Try Updating your destroy action to
#order = Order.find(params[:id])
#order.destroy
#orders=Order.all
remove all the redirects
will work.

jQuery .load()-function doesn't reload element (Rails)

In my Rails Project, I am trying to alter an instance variable via JS in a controller response (create.js.erb) and then reload an HTML-Element that makes use of the instance variable. But it doesn't work. Is it possible? This is just an example.
I also want to display the newly created object. But as I don't seem to understand the mechanism of exchanging information between rails and JS, I wanted to keep it simple here.
vocabs-controller.rb
def new
#user = current_user
#vocab = #user.vocabs.build
#vocabs = #user.vocabs.all
#count = #vocabs.count
.
.
end
def create
#user = current_user
#vocab = #user.vocabs.build(vocab_params)
#count = #user.vocabs.count
.
.
respond_to do |format|
format.html do
redirect_to new_user_vocab_path(#user)
flash[:success] = "Vocab created!"
end
format.js {render :layout=>false}
end
else
respond_to do |format|
format.html {render 'vocabs/new'}
format.js
end
end
new.html.erb (from here I make the call to the controllers create action)
<div class="panel-body">
<%= form_for(#vocab,
url: user_vocabs_path(#user),
method: :post, remote: true) do |f| %>
.
.
.
<%= f.submit "Add", class: "btn btn-large btn-primary" %>
<% end %>
<h4>
<%= #count %> Vocabs in your collection
</h4>
<%= link_to "(Show)", "#", id: "show_link" %>
<%= link_to "(Hide)", "#", id: "hide_link" %>
<ul class='vocabs <%= #vocabs_class %>'>
<% #vocabs.each do |vocab| %>
<%= render vocab %>
<% end %>
</ul>
<hr>
<%= link_to "Back", home_user_path(#user) %>
</div>
.
.
create.js.erb
<% #count+=1 %>
$('h4').load();
The server recognizes that I made a JS request and also renders create.js.erb with 200 OK. But the .load() function doesn't seem to reload the h4-Element with the new data.
When I was trying to .load() the div-element that contains the formular fields, these also weren't updated. The text input was still visible.
Further question: Where can I debug the code in JS Controller responses? I can't find them neither in Chrome's dev tools nor in Rails's server output.

If I follow you correctly, try
Add an id attribute to h4:
<h4 id="count-header">...</h4>
And in the .erb.js callback:
$('#count-header').text('<%= #count += 1 %> Vocabs in your collection');

Form_for doesn't work with JS/JQuery

I have problems getting a form to work when I use JavaScript with it.
Without the remote option set to true all works fine but as soon as I
set it, change the controller and create the needed JS files it produces an
POST .. 500 Internal Server Error
when clicking on the submit button.
Furthermore the reply-preview shows me a Rails Error Page saying
NoMethodError in Vocabs#create and undefined method > for nil:NilClass
in a related partial (which works fine before using JS)
The form (vocabs/_new_form.html.erb) looks like this:
<%= form_for #vocab, remote: true do |f| %>
<%= render 'fields', f: f %>
<%= f.submit "Add", class: "btn btn-large btn-primary" %>
<% end %>
The vocab_controller's create action like this:
def create
#user = current_user
#vocab = current_user.vocabs.build(vocab_params)
#vocabs = #user.vocabs.paginate(page: params[:page])
respond_to do |format|
format.html {
if #vocab.save
flash.now[:success] = "Vocab created!"
redirect_to root_url
else
flash.now[:error] = "Vocab not saved!"
render 'new'
end
}
format.js
end
end
The create.js.erb like this:
$('#new_vocab').remove();
Of course I want to do more than just to remove the form but as I didn't even manage to do that I wanted to keep it simple.
_fields.html.erb:
<%= render 'shared/error_messages', object: f.object %>
<div class="field">
<%= f.label :nl_word, #user.native_language %>
<%= f.text_field :nl_word %>
<%= f.label :fl_word, #user.foreign_language %>
<%= f.text_field :fl_word %>
<%= f.label :tag, "Your Tag" %>
<%= f.text_field :tag%>
<%= f.label :importance, "Importance" %>
<%= f.select(:importance, options_for_select(
StaticData::IMPORTANCE_SEED, :selected => f.object.importance)) %>
</div>
I hope I could explain myself good enough to get some help here. I tried for hours to find the solution to the problem myself and was looking for similar questions here without finding any and without getting anywhere.

With the help of a friend I found out that the main problem was that I didn't provide any validation for the vocab object i wanted to create in the form (_new_form.html.erb), when processing it with JS.
So I changed the vocab_controller.rb to
def create
#user = current_user
#vocab = current_user.vocabs.build(vocab_params)
#vocabs = #user.vocabs.paginate(page: params[:page])
respond_to do |format|
if #vocab.save
flash.now[:success] = "Vocab created!"
format.html do
redirect_to root_url
end
format.js
else
flash.now[:error] = "Vocab not saved!"
format.html do
render 'new'
end
format.js
end
end
end
That does the trick, and my form works with JS now.

How do insert a custom "not found message" on my search function using Javascript in Rails?

I've been able to implement a search function using AJAX in Rails but when a user types in a search query and doesn't find anything the result currently displays nothing. Instead of this, I want to display a message such as: 'Sorry nothing was found!', but I can't seem to get this to work.
This is my code from the index.js.erb file:
$('#products').append('<%= escape_javascript render(#products) %>');
$('.pagination').replaceWith('<%= escape_javascript paginate(#products) %>');
This is the code in my index.html.erb file:
<%= form_tag products_path, method: :get, authentication: false, id: 'search-form' do %>
<%= text_field_tag :search, params[:search] %>
<%= submit_tag "Search" %>
<% end %>
<div class="small-block-grid-2 medium-block-grid-3 large-block-grid-3" id="products">
<% #products.each do |product| %>
<%= render product %>
<% end %>
</div>
And finally this is the bit of relevant code in my products_controller.rb file:
respond_to :html, :js, :json
def index
#products = if params[:search].present?
Product.where("name LIKE ?", "%#{params[:search]}%")
else
Product.all
end
#products = Product.order(created_at: :desc).page(params[:page]).per(13)
respond_with #products
end
def search
#products = Product.where("name LIKE ?", "%#{params[:search]}%")
render #products
end
Sorry I should've included this in the question as well. Now I am able to get this message of "Sorry nothing was found!" message to display when a search query comes up with nothing, BUT the problem is that I have to press enter twice in order for it to display the message. What can I do to change my code here so when nothing is found the first time it displays: "Sorry nothing was found!"?
This is the code in my assets/javascripts/products.js file:
$(document).ready(function(){
$('#search-form').submit(function(event){
event.preventDefault();
var searchValue = $('#search').val();
$.get('/products/search?search='+searchValue)
.done(function(data){
console.log(data);
if ($("#products").children().length != 0){
$('#products').html(data);
}else{
$('#products').html("<h3>Sorry nothing was found!</h3>");
}
});
});
});
I believe that's all the necessary information needed to understand this question. If you need more clarification in order to understand what I'm doing, I'll be glad to provide it.
Thank you all for your input!

The AJAX request cannot see the effect without refresh the browser in Rails

I faced the same problem with this guy
I change rjs to js.erb just like him. And we all use <%= button_to 'Add to Cart',line_items_path(:product_id => product) ,:remote=>true %> to send an AJAX request to the controller. format.js to fine and execute create.js.erb. But the cart did not add anything.
log result :
Rendered line_items/_line_item.html.erb (4.3ms)
Rendered carts/_cart.html.erb (8.0ms)
Rendered line_items/create.js.erb (8.8ms)
That's the index.html.erb we send the AJAX request
<% if notice %>
<p id="notice"><%= notice %></p>
<% end %>
<h1>Your Pragmatic Catalog</h1>
<% #products.each do |product| %>
<div class="entry">
<%= link_to image_tag(product.image_url), line_items_path(:product_id => product), html_options = {:method => :post} %>
<h3><%= product.title %></h3>
<%=sanitize product.description %>
<div class="price_line">
<span class="price"><%= number_to_currency(product.price,:precision=>3) %></span>
<%= button_to 'Add to Cart',line_items_path(:product_id => product) ,:remote=>true %>
</div>
</div>
<% end %>
That's the line_items controller function to handle the request
# POST /line_items
# POST /line_items.json
def create
# for exercise only
session[:counter] = nil
#cart = current_cart
product = Product.find(params[:product_id])
#line_item = #cart.add_product(product.id)
respond_to do |format|
if #line_item.save
format.html { redirect_to store_index_path }
format.js
format.json { render json: #line_item, status: :created, location: #line_item }
else
format.html { render action: "new" }
format.json { render json: #line_item.errors, status: :unprocessable_entity }
end
end
end
create.js.erb
$('#cart').html("<%= escape_javascript(render(#cart)) %>");

I fixed the problem.
Thanks to the great article which tell me the ability of firebug to see the source of response from AJAX request.
And JSLint helps me checkout the javascript syntax.
And finally I would like to thanks the Firebug which is such a great tool.
The problem is that the javascript is not being executed if there is any syntax error.
In my problem:
I should use single-quoted instead of double-qouted to wrap the render results. The render results comes out with many HTML with "", and "" which wrap them will cause syntax error in javascript. (double-qouted in double-qouated is not allowed)
So I simply change $('#cart').html("<%= escape_javascript(render(#cart)) %>"); to
$('#cart').html('<%= escape_javascript(render(#cart))%>');
I hope this answer will help the others who also suffer from this nightmare staff.
Help me increase the question rate if this is possible :)

Let's use j() helper method: $('#cart').html("<%=j render(#cart) %>");