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Render success.js.erb personal_alert not displaying (Ruby on Rails)

I have a button that is used to verify a user's zip code. When clicked, the desired functionality would be an alert display saying whether the zip code was verified or not.
<%= button_tag 'Verify zip code', :type => 'button', :id => 'self-install', remote: true %>
The alert file is in my Views and is in zipcodes/success.js.erb and zipcodes/failure/js.erb
This is my controller:
if data.empty?
respond_to do |format|
format.html do
redirect_to page_path(submitted_page)
end
format.js do
render 'zipcodes/failure'
end
end
else
respond_to do |format|
format.html do
redirect_to page_path(submitted_page)
end
format.js do
render 'zipcodes/success'
end
end
end
Here is my ajax request:
$(function(){
$('#self-install').click(function(e){
e.preventDefault();
$.ajax({
url: '/zipcodes/new',
type: 'get',
dataType: 'json',
data: { zip: zipCodes },
success: function(r){
}
});
});
});
When I click the button, my terminal says this:
But nothing is displaying. I am using Ruby on Rails. Any help would be greatly appreciated. Please let me know if there is anything I left out that would be helpful.

If you have a remote: true element, the ajax call in your js is unnecessary, besides your remote element should be a link_to with the respective url instead of button_tag
Resulting in the following code in your view:
<%= link_to 'new zipcode', new_zipcode_path, remote: true %>

How to get data from response of event ajax:error in Rails 5.1

Iam building a form in Rails. I want to submit it by ajax, so I setted remote: true
<%= form_for #post, html: { multipart: true }, remote: true do |f| %>
...
<%= end %>
In my controller:
def create
#post = Post.new(post_param)
respond_to do |format|
if #post.save
format.html { redirect_to #post, notice: 'Post was successfully created.' }
format.json { render :show, status: :created, location: #post }
else
format.html { render json: #post.errors, status: 400 }
format.json { render json: #post.errors, status: 400 }
end
end
end
In form on view
$('#new_post').on('ajax:success', function(data) {
console.log(data);
}).on('ajax:error', function(evt, xhr, status, error) {
console.log(xhr);
});
But in event 'ajax:error', I can't parse to get data about validation errors of post. All params 'xhr', 'status', 'error' both equal undefined.
How to parse response in 'ajax:error' to get data about validation errors ?

Rails 5.1 introduced rails-ujs, which changes the parameters of these event handlers. The following should work:
// ...
.on('ajax:error', function(event) {
var detail = event.detail;
var data = detail[0], status = detail[1], xhr = detail[2];
// ...
});
Source: http://edgeguides.rubyonrails.org/working_with_javascript_in_rails.html#rails-ujs-event-handlers

Rails: Using Ajax to fill Jquery Autocomplete

I've been all over the place plugging different things into this process and I still get no results.
Sometimes I get the infamous extra "<" error, sometimes absolutely nothing happens, and I'm not sure if this is the problem but I think Google developer is showing that the current page is being sent as the json file I'm asking for and not the json I'm sending (see later). This is what I see in google developer:
Which is definitly NOT my json file:
In any case, this is my javascript:
$('#q_name_cont').autocomplete({
url: "autocomplete/items",
dataType: 'json'
});
This is my route:
get 'autocomplete/items' => 'home#autocomplete_items', :defaults=>{:format=>'json'}
Controller Action (commented out part is another method I was trying for a while):
def autocomplete_items
# respond_to do |format|
# format.js {render 'autocomplete_items'}
#products = Item.all.order(:name)
respond_to do |format|
format.html
format.json {
render json: #products.map {|item| item.name}
}
end
end
Before I was using mapping, I was using this view for the render:
{
"items": [
<%Item.all.each do |i|%>
{ "<%=i.name%>","<%=i.name%>" },
<%#end%>
{ "value": "", "data": "" }
]
}
I've really been all over the place, trying for a very long time to get this to work. What am I missing?

IIRC, Your url and dataType options just do not exist in autocomplete's documentation. You could try source option instead:
$('#q_name_cont').autocomplete({
source: function (request, response) {
$.ajax({
url: "/autocomplete/items", // should be with '/'
dataType: 'json',
data: { query: request.term },
success: function(data) {
// call response to return the result to autocomplete box
response(data);
}
});
}
});
Of course, this is just for showing up all items, if you want to filter like real autocomplete box, you should modify controller to filter the result base on query:
def autocomplete_items
#products = Item.all.order(:name)
respond_to do |format|
format.html
format.json {
render json: #products
.where('name ILIKE ?', "%#{params[:query]}%")
.pluck(:name)
}
end
end

Sending back an ajax error response in rails contoller

I am attempting to send back an error response to an ajax call in a rails controller.
Below is my create action in my controller the javascript function with the ajax call. I need to send back a error response so the error portion of the ajax request is called. I can not figure out how to get this to work.
def create
#company = Company.find(params["company_id"])
#campaign = #company.campaigns.build(campaign_params)
if #campaign.save
redirect_to campaign_get_campaigns_path(#company)
else
respond_to do |format|
format.json {render :json => {:error_message => #campaign.errors.full_messages, :success => false } }
end
end
end
$(document).on('click', '#submitCampaign', function (e) {
$form = $('.new_campaign');
$.ajax({
type: "POST",
url: $form.attr('action'),
data: $form.serialize(),
dataType: "json"
});
error: function(data) {
newfunction(data);
}
});
The response I am getting in the terminal is:
Completed 200 OK in 269ms (Views: 0.2ms | ActiveRecord: 9.9ms)

You have to define response :status. In this case is the best choice 422 Unprocessable entity.
format.json { render :json => { :error_message => #campaign.errors.full_messages }, :status => :unprocessable_entity }

What am I doing wrong with this AJAX request using a form_for in Rails 4?

I'm trying to do a form submission through AJAX in Rails and I am not too sure what is wrong here. I got everything to work using "remote: true" but I want to gain a better understanding of how the AJAX works with jQuery. This is my javascript code:
$(document).ready(function(){
$("#new_user_friendship").on("submit", function(event){
event.preventDefault();
var friendId = $("#user_friendship_friend_id").val();
var _this = $(this);
$.ajax({
url: "/user_friendships",
data: _this.serialize(),
method: "POST",
dataType: "json",
success: function(data){
console.log(data);
friendButton.hide();
$(".friend-request-form").html("<p>Friend request sent</p>");
}
});
});
});
I am suspecting this line url: "/user_friendships/new?friend_id="+friendId containing the url is the culprit of my errors. I wrote this because a hidden field is being passed as a person's friend id but it throws a "404 error", I've also tried url: "/user_friendships" which doesn't return any errors but it also doesn't properly execute the Javascript as I expected.
This is the corresponding form_for that the AJAX request is sent to:
<div class="friend-request-form">
<%= form_for current_user.user_friendships.build(friend_id: #user), id: "new_user_friendship", method: :post do |f| %>
<%= f.hidden_field :friend_id, value: #user.id %>
<%= submit_tag "Send friend request", class: "button radius tiny", id: "friend-request-button" %>
<% end %>
</div>
What this form does is it sends a friend request to another user using a hidden field.
And in my user_friendships_controller.rb I have this code:
def create
if params[:user_friendship] && params[:user_friendship].has_key?(:friend_id)
#friend = User.find(params[:user_friendship][:friend_id])
#user_friendship = UserFriendship.request(current_user, #friend)
respond_to do |format|
if #user_friendship.new_record?
format.html do
flash[:error] = "There was a problem creating that friend request."
redirect_to user_path(#friend)
end
format.json {render json: #user_friendship.to_json, status: :precondition_failed}
else
format.html do
flash[:success] = "Friend request sent"
redirect_to user_path(#friend)
end
format.json {render json: #user_friendship.to_json, status: :precondition_failed}
end
end
else
flash[:error] = "Friend required"
redirect_to root_path
end
end
If anyone can provide any suggestions or feedback that'd be great!
UPDATE:
Now that I added in data: _this.serialize() and changed the url to: url: "/user_friendships" I'm now getting a 412 (Precondition Failed) error. Despite this error the data is actually being saved into the database. Does anyone know why I'm getting this 412 (Precondition Failed) error?

There is something I do not understand, with the dataType json, you said that you had a precondition failed status right ?
But you wrote
format.json {render json: #user_friendship.to_json, status: :precondition_failed}
So I don't think there is any problem, indeed, it seems to work fine, as you explicitly passed the status in your render command, try removing it and I think you will have a 200 (success) status instead.
Of course, you can keep the previous post ajax request, or use this short version
$.post(
/user_friendships',
{ user_friendship: { friend_id: friendId } },
function(){
console.log(data);
friendButton.hide();
$(".friend-request-form").html("<p>Friend request sent</p>");
},
'json')

Add a data attribute to the post params instead of passing it in the url:
$.ajax({
url: "/user_friendships",
data: { user_friendship: { friend_id: friendId } }, // <<< Updated
method: "POST",
dataType: "json",
success: function(data){
console.log(data);
friendButton.hide();
$(".friend-request-form").html("<p>Friend request sent</p>");
}
});
Update
The url should be /user_friendships, assuming that you're using RESTful actions. Have a look to this article about REST in Rails.
Also, when you do an AJAX request like this, your are not sending the rails authenticity tokens that are crated by the form helper. This may be the cause of your 412 (Precondition Failed) error.
See: Understanding the Rails Authenticity Token