I have an app where a user has a portfolio that has many positions and each position has many movements. So the url for an associated movement index page for a particular position looks like: portfolio_position_movements. I have an index page with and the controller action looks like
def index
#movements = #position.movements.all
respond_to do |format|
format.html
format.json { render json: #movements}
end
end
My ajax call in my movements.js file is this:
var loadData = function(){
$.ajax({
type: 'GET',
contentType: 'application/json; charset=utf-8',
url: ?,
dataType: 'json',
success: function(data){
drawBarPlot(data);
},
failure: function(result){
error();
}
});
};
How can I pass in a dynamic route path so this will work with the movement index on any position object?
You can use erb tags in js files, for me i did it as the following:
#edit.js.erb
$modal = $('.modal'),
$modalBody = $('.modal .modal-body'),
$modalHeading = $('.modal .modal-heading');
$modalHeading.html("Edit <%= #student.full_name.titleize %>'s information");
$modalBody.html("<%= escape_javascript(render 'edit_student') %>");
$modal.modal();
Note: the file extension is .js.erb so rails can process it. I was calling a modal form and the edit method in students_controller.rb was:
def edit
#student = Student.find(params[:id])
respond_to do |format|
format.html # edit.html.erb
format.js # edit.js.erb
format.json { render json: #student }
end
end
Edit:
You can embed the JS code inside html.erb and use rails routes like:
<script>
var loadData = function(){
$.ajax({
type: 'GET',
contentType: 'application/json; charset=utf-8',
url: <%= my_ajax_path %>,
dataType: 'json',
success: function(data){
drawBarPlot(data);
},
failure: function(result){
error();
}
});
};
</script>
What is my_ajax_path?
Is a rails route defined in routes.rb for example i need a list of all available sections that students can apply to using ajax so i did the following:
1- defined a method in students_controllers.rb like this one:
def available_sections
batch_id = (params[:batch_id].nil? || params[:batch_id].empty?) ? 0 : params[:batch_id].to_i
if batch_id == 0
#sections = [].insert(0, "Select Section")
else
batch = Batch.find(params[:batch_id])
# map to name and id for use in our options_for_select
#sections = batch.sections.map{|a| [a.section_name, a.id]}
end
end
2- added a route to it in routes.rb
resources :students do
collection do
get :available_sections
post :create_multiple
end
end
3- Inside new.html.erb:
<script type="text/javascript">
$(document).ready(function() {
$('.student_section_id').hide();
$('#student_batch').change(function() {
$.ajax({
url: "/students/available_sections",
data: {
batch_id : $('#student_batch').val()
},
dataType: "script",
success: function () {
if (+$('#student_batch').val() > 0)
{
$('.student_section_id').fadeIn();
}
else
{
$('.student_section_id').fadeOut();
}
}
});
});
});
</script>
Forget about that messy code :D as it was my first steps but you get the point, and for this line url: "/students/available_sections" it should be using rails routes you can get it by calling rails routes from the command line to get a list of all your application routes
Related
I want send selected drop down menu value to controller by ajax
panel_controller.rb
class PanelController < ApplicationController
def insert
#city_ids = params[:city]
end
end
panel.js.erb
$(document).ready(function() {
$('#f_city_id').change(function() {
var city_js_id = this.value
$.ajax({
url: '/panel/insert',
type: 'GET',
data: {"city": city_js_id},
success: function (data,status)
{
alert(this.url);
}
});
return false;
});
});
routes.rb
get '/panel/insert' => 'panel#insert'
views/panel/insert.html.erb
<%= #city_ids %>
but #city_ids dont respond value after chenge drop down menu
You need to respond back from your insert method.
Try doing this
class PanelController < ApplicationController
def insert
#city_ids = params[:city]
respond_to do |format|
format.html { render partial: 'insert.html.erb' }
end
end
end
Create a partial file with the new content _insert.html.erb
<%= #city_ids %>
In you panel.js.erb try catching the response and append it in your DOM wherever necessary. Your updated value will be on the page.
$(document).ready(function() {
$('#f_city_id').change(function() {
var city_js_id = this.value
$.ajax({
url: '/panel/insert',
type: 'GET',
data: {"city": city_js_id},
success: function (res){
$("#somediv").html(res);
//You will get the partial's content with the new data and you'll only need to append it to your page.
}
});
return false;
});
});
I'm working in a simple increment fonction who is not working. In my console I have this error "NetworkError: 404 Not Found - ..../test/increment_nbr" and I'm not able to fix it.
Html:
<button id="incr">AJAX2</button>
<script>
$("#incr").on("click", function(e) {
e.preventDefault();
$.ajax({
url: "/test/increment_nbr",
dataType: "json",
type: "POST",
success: function(data) {
}
});
})
</script>
My controller:
respond_to :html, :json
def increment_nbr
#user = User.find(params[:id])
#user.increment! :nbr_set
render json: { nbr: #user.nbr_set }.to_json
end
Routes:
resources :test do
member do
put :increment_nbr
post :increment_nbr
end
end
Your routing is incorrect - you've defined your two increment_nbr routes as member routes, meaning they operate on an instance of your parent test route and would generate URLs like /test/2/increment_nbr.
See http://guides.rubyonrails.org/routing.html#adding-more-restful-actions for more information
on change of a dropdown value i am trying to populate other dropdown list value.
Here i have added my new action in routes.rb :
resources :appointments do
collection do
get :getdata
end
end
This is my js code :
$("#appointment_department_id").change(function(){
//on change of department dropdown.
$.ajax({
url: "/appointment/getdata",
type: "GET",
data: {department_id: $(this).val()},
success: function(data){
alert(data);
}
error: function(data){
alert(data);
}
});
});
here is my action in controller file :
def getdata
#dept_id = params[:department_id]
department_name = #dept_id
#all_doctors = User.all; #will write my custom query later.
end
But on call to this action, it's returning error:
"NetworkError: 404 Not Found - http://localhost:3000/appointment/getdata?department_id=5"
(checked in firebug)
the error is in the ajax url, in the ajax request you are using 'appointment/getdata', but in routes you have defined appointments,
so use
$("#appointment_department_id").change(function(){
//on change of department dropdown.
$.ajax({
**url: "/appointments/getdata",**
type: "GET",
data: {department_id: $(this).val()},
success: function(data){
alert(data);
}
error: function(data){
alert(data);
}
});
});
Where's your respond_to in your controller?
If you're sending an Ajax request, you'll have to either define respond_to "JS" or "JSON" like this:
def getdata
respond_to do |format|
format.js
end
end
You could also do it like this:
Class Controller
respond_to :html,:js, :json
def getdata
respond_with(#custom_vars)
end
end
i think you forget "s" of "appointment" word in url: "/appointment/getdata", so try to add "s" like this :
$.ajax({
url: "/appointments/getdata",
...
...
I was wondering how you can get 2 variables to update a div tag using an ajax call instead of just 1. My current .js file:
$(document).ready(function() {
$("select").change(function() {
var selected_product_id;
selected_product_id = $(this).val();
$.ajax({
url: "/products/" + selected_product_id,
type: "GET",
success: function(data) {
$("#description").empty().append(data);
}
});
});
});
show.html.erb where i get the data:
<%= #product.item %>
I would like something like this
$.ajax({
url: "/products/" + selected_product_id,
type: "GET",
success: function(data) {
$("#description").empty().append(data[1]);
$("#price").empty().append(data[2]);
}
});
with
<%= #product.item %>
<%= #product.price %>
where my description div gets updated with #product.item and my price div gets updated with #product.price. How could I achieve this?
EDIT
updated .js file
$(document).ready(function() {
$("select").change(function() {
var selected_product_id;
selected_product_id = $(this).val();
$.ajax({
url: "/products/" + selected_product_id,
type: "json",
success: function(data) {
$("#description").empty().append(product.item);
$("#price").empty().append(product.price)
}
});
});
});
show.html.erb:
<%= #product.item %>
<%= #product.price %>
controller:
class ProductsController < ApplicationController
respond_to do |format|
format.html # show.html.erb
format.json { render :json => #product.to_json }
end
def index
end
def show
#product = Product.find(params[:id])
end
end
I'm pretty sure that controller isn't correct. I placed #product before respond_to and it didn't work so I just put respond_to without really knowing where it goes. Sorry for being such a noob. Thanks for all your help.
FINAL EDIT:
working javascript file:
$(document).ready(function() {
$("select").change(function() {
var selected_product_id;
selected_product_id = $(this).val();
$.getJSON("/products/"+selected_product_id,function(data){
$("#description").empty().append(data.item);
$("#price").empty().append(data.price);
});
});
});
Ah, This remembers me a piece of code I wrote for you a week ago!
You can use JSON to render your Product:
#controller
def show
#product = Product.find(params[:id])
respond_to do |format|
format.html # show.html.erb
format.json { render :json => #product.to_json }
end
end
And handle the response from the server like this:
$.ajax({
url: "/products/" + selected_product_id,
dataType: 'JSON',
success: function(data) {
var product = JSON.parse(data);
$("#description").empty().append(product.item);
$("#price").empty().append(product.price);
}
});
Edit #1: I found this method: jQuery.getJSON : http://api.jquery.com/jQuery.getJSON/
You could use JSON, return
{"item": "<%=j #product.item %>", "price": <%= #produce.price %>}
then type: 'json' in the ajax call
I have an ajax call to fetch information from Flickr API which returns JSON data. I want to display values from JSON data in my view. I do this by editing some innerHTML with jQuery. The problem I am having is that the data is undefined, so it looks like a scoping problem.
photo.js
jQuery(function() {
$('#<%=p[:id]%>').click(function (e) {
//ajax call to fetch photo info
var fetch_id = '<%=p[:id]%>';
var fetch_secret = '<%=p[:secret]%>';
$.ajax({
type: 'GET',
url: '/photos/fetch_info',
dataType: 'json',
data: { 'id' : fetch_id, 'secret' : fetch_secret },
success: function(data){
console.log(data) //returns Object
console.log(data.title) //returns appropriate title
//edit innerHTML of basic_modal
$('.basic_modal').html(
"<div id='modal_image'><%= escape_javascript(image_tag p[:url]) %></div><div id='photo_title'><%=data.title %></div>"
);
//load modal
$('.basic_modal').modal({
overlayClose:true
});
} //end success: function(result)
});
When I print data.title to console, I get the appropriate title. However, when I try to edit HTML and render <%=data.title %>, I get an undefined variable/method error.
Any tip on how I can display the data in my modal in the view?
Here is my controller:
def fetch_info
#info = flickr.photos.getInfo(:photo_id => params[:id], :secret=> params[:secret])
respond_to do |format|
format.json { render :json => #info }
end
end
var result = jQuery.parseJSON(data);
You donot need to do this, Because datatype:JSON already parse the data
$('.basic_modal').html(
"<div id='modal_image'><%= escape_javascript(image_tag p[:url]) %>
</div><div id='photo_title'><%="+data.title+" %></div>"
);
this might help you