How to send django url with parameters to ajax request?

How to send django url with parameters to ajax request? - javascript

Currently, I am sending url to the ajax as :
$('.togglebtn').on("click",function(){
console.log("Hello")
$.ajax({
type: 'GET',
url: "http://localhost:8000/toggle/2945016571198",
contentType: 'application/json',
success: function (data) {
appendData(data);
function appendData(data) {
var mainContainer = document.getElementById("switch_{{forloop.counter}}");
for (var i = 0; i < data.length; i++) {
var div = document.createElement("div");
div.innerHTML = '<tr>' + data[i].line_items + ' ' + data[i].nomenclature+'</tr>' ;
mainContainer.appendChild(div);
}
}
}
});
Currently, I am sending request into a static url. Can we use {% url toggle i.id %} to set the url dynamically in the ajax request? Does this ajax function repeats at all or not?

Not in that way or fashion, the {% url toggle i.id %} is for the Django template, so that is executed when rendering the page server side. What you want to do is client side.
Your are also trying to use "switch_{{forloop.counter}}", which won't work unless you have multiple snippets of the 'click' function. Which I would advise against since it simply doesn't make sense. You define a function once and then use it. See first example.
Best thing I can think of is exposing a 'base url' in your template and use that in javascript.
For example in your Django template:
<script>
// Put the Django variable into javascript context.
toggle_base_url = {{ toggle_base_url_from_django_view_context }};
// Use it in your ajax url by combining strings.
$('.togglebtn').on("click",function(){
console.log("Hello")
var obj = $(this); // Save the clicked button for reference.
var objectId = obj.attr('id');
var buttonId = obj.attr('data-button-id');
$.ajax({
type: 'GET',
url: toggle_base_url + "/" + buttonId
contentType: 'application/json',
success: function (data) {
// Cannot use 'this' in this context (IIRC), use the obj var we assigned.
// Replace with something to find your parent container
// Could use have a attribute on your button that points to the container.
// Probably the number you use in the url?
var mainContainer = obj.parent('containerclass');
for (var i = 0; i < data.length; i++) {
var div = document.createElement("div");
div.innerHTML = '<tr>' + data[i].line_items + ' ' + data[i].nomenclature+'</tr>' ;
mainContainer.appendChild(div);
}
}
}
});
</script>
In your Django view you do something like this:
# Make a base url to reuse, remove the last part.
# So turn `/toggle/1` into `/toggle`
base_url = reverse('toggle', args=[1]).rsplit('/', 1)
context = {
'toggle_base_url_from_django_view_context': base_url,
}
return render(request, 'yourtemplate.html', context=context)

Related

Highlight word and send GET request

I've created a text field in a Django model. I want to highlight words when word is clicked. I've found this jsFiddle
How can I adjust it to send a GET request to Django when a word is selected to receive JSON from other website API? Thanks in advance!
$(function() {
editTxt('#myTxt');
editTxt('#myTxtDiv');
$('span').live('mouseover', function() {
$(this).addClass('hlight');
});
$('span').live('mouseout', function() {
$(this).removeClass('hlight');
});
});
function editTxt(selector) {
$(function() {
var newHtml = '';
var words = $(selector).html().split(' ');
for (i = 0; i < words.length; i++) {
newHtml += '<span>' + words[i] + '</span> ';
}
$(selector).html(newHtml);
});
}

You might do something like this by using $.ajax:
...
$("span").on("mouseover", function() {
xhr = $(this).addClass("hlight");
$.ajax({
method: "post",
url: "YOUR_DJANGO_API_URL",
data: { text: $(this).text() },
success: function(data) {
// replace HTML element or whatever.
console.log(data);
}
});
});
$("span").on("mouseout", function() {
xhr.abort();
$(this).removeClass("hlight");
});
...
Note you have to replace data object text attribute to whatever your API backend parameters accepts, and as mentioned in the comments you don't need .live()
Make sure to replace YOUR_DJANGO_API_URL with your backend API URL

Communication beetween Javascript and PHP scripts in web app

THE CONTEXT
I'm developing a web app that loads contents dynamycally, retrieving data from a
catalogue of items stored as a MongoDB database in which records of the items and their authors are in two distinct collections of the same database.
Authors ID are stored in the item field creator and refer to the author field #id. Each item can have none,one or many authors.
Item sample
{
"_id" : ObjectId("59f5de430fa594333bb338a6"),
"#id" : "http://minerva.atcult.it/rdf/000000016009",
"creator" : "http://minerva.atcult.it/rdf/47734211-2637-3895-a690-4f33412931ec",
"identifier" : "000000016009",
"issued" : "fine sec. XIV - inizi sec. XV",
"title" : "Quadrans vetus",
"label" : "Quadrans vetus"
}
Author sample
{
"_id" : ObjectId("59f5d8e80fa594333bb1d72c"),
"#id" : "http://minerva.atcult.it/rdf/0007e43e-107f-3d18-b4bc-89f8d430fe59",
"#type" : "foaf:Person",
"name" : "Risse, Wilhelm"
}
WHAT WORKS
I query the database submitting a string in a form, using this PHP script
ITEM PHP SCRIPT
<?php
require 'vendor/autoload.php';
$title=$_GET['item'];
$client = new MongoDB\Client("mongodb://localhost:27017");
$db=$client->galileo;
$collection=$db->items;
$regex=new MongoDB\BSON\Regex ('^'.$title,'im');
$documentlist=$collection->find(['title'=>$regex],['projection'=>['_id'=>0,'title'=>1,'creator'=>1,'issued'=>1]]);
$items=$documentlist->toArray();
echo (json_encode($items));
?>
called by a Javascript script (new_search.js) using ajax, that has also the responsibility to attach to html document a <li class=item> for every item that matches the query, inserting the JSON fields and putting them in the provided tags ( <li class=item-name>,<li class=auth-name, and the last <li> in div class=item-info for date).
WHAT DOES NOT WORK
My intent is reproduce the pattern to retrieve author names from another collection in the same database, querying it using author field #id from the html tag <li class=auth-name, using a similar php script and a similar ajax call.
I tried to make a nested ajax call (in the one I used to retrieve the items infos) to invoke author_query.php that performs the MongoDB query on the collection of authors.
So, the question is: Is it possible use the $_GET superglobal to get the html tag that contains the author id #id in order to search it in the database?
Otherwise, how can I adjust the code to pass a javascript variable to php (not by user input) that lets me keep the content already loaded on the page?
UPDATES
To make clearer the question, I follow the tips in the comments and I updated my scripts using JSON directly to provide the needed data.
I also perfom a debug on the js code and it's clear that PHP don't provide any response,in fact ajax calls for authors name fails systematically.
I suppose that occurs because PHP don't receive the data dueto the fact I'm not using the correct syntax probably (in js code or in the php with $_GET or in both) to pass the variable author (I also tried data:'author='+author treating the JSON object author has a string). Anyway I don't understand what is the correct form to write the variable to pass using the data field of ajax().
MY SCRIPTS
JS SCRIPT new_search.js
$(document).ready(function () {
$("#submit").on("tap", function () {
var item = document.getElementById("search").value;
var author;
$.ajax({
url: "item_query.php",
type: "GET",
data: 'item=' + item,
dataType: "json",
async:false,
success: function (items) {
for (var i = 0; i < items.length; i++) {
$("#items-list").append(
'<li class="item">' +
'<div class="item-photo-container">' +
'<img src=images/item_126.jpg>' +
"</div><!--end item-photo-container-->" +
'<div class="item-info">' +
'<ul>' +
'<li><a><h3 class="item-name">' + items[i].title + '</h3></a></li>' +
'<li class="auth-name">' + items[i].creator+ '</li>' +
'<li>' + items[i].issued + '</li>' +
'</ul>' +
'</div><!--end item-info-->' +
'</li><!--end item-->'
);
}
}
});
$('.item').each(function () {
author = $(this).find('.auth-name').text();
if (author == 'undefined')
$(this).find('.auth-name').text('Unknown');
else if(author.indexOf(',')!=-1) {
author='[{"author":"'+author+'"}]';
author=author.replace(/,/g,'"},{"author":"');
author = JSON.parse(author);
console.log(author);
$.ajax({
url: "author_query.php",
type: "GET",
data: author,
dataType: "json",
processData: false,
success: function (auth_json) {
$(this).find('.auth-name').text('');
var author_text=' ';
for(var i=0;i<auth_json.length;i++)
author_text+=auth_json.name+' ';
$(this).find('.auth-name').text(author_text);
},
error: function () {
console.log('Error 1');
}
});
}
else{
author='{"author":"'+author+"}";
author=JSON.parse(author);
$.ajax({
url: "author_query.php",
type: "GET",
data: author,
dataType: "json",
processData: false,
success: function (auth_json) {
$(this).find('.auth-name').text(auth_json.name);
},
error: function () {
console.log('Error 2');
}
});
}
});
});
});
AUTHOR PHP SCRIPT author_query.php
<?php
require 'vendor/autoload.php';
$auth=$_GET['author'];
$client = new MongoDB\Client("mongodb://localhost:27017");
$db=$client->galileo;
$collection=$db->persons;
if(is_array($auth)){
foreach ($auth as $a){
$document=$collection->findOne(['#id'=>$a],['projection'=>['_id'=>0,'name'=>1]]);
$auth_json[]=( MongoDB\BSON\toJSON(MongoDB\BSON\fromPHP($document)));
}
}
else{
$document=$collection->findOne(['#id'=>$auth],['projection'=>['_id'=>0,'name'=>1]]);
$auth_json=( MongoDB\BSON\toJSON(MongoDB\BSON\fromPHP($document)));
}
echo (json_encode($auth_json));
?>

"I'm sure that authors array... is not empty and actually contains the authors IDs". You mean the jQuery object $('.item')? I think that it is empty, because it is created too soon.
The first $.ajax call sends an ajax request and sets a handler to add more stuff to the HTML, including elements that will match the CSS selector .item. But the handler doesn't run yet because it's asynchronous. Immediately after this, the object $('.item') is created, but it's empty because the new .item elements haven't been created yet. So no more ajax requests are sent. Some time later, the call to item_query.php returns, and the new HTML stuff is added, including the .item elements. But by now it's too late.
You say the array was not empty. I suspect you checked this by running the CSS selector after doing the search, after the return of the ajax call.
A lot of newbies have problems like this with asynchronous javascript. If you want to use the result of an asynchronous function in another function, you have to call the second function inside the callback function of the first one. (Actually there are more sophisticated ways of combining asynchronous functions together, but this is good enough for now.)
On a side note, you've done this in a slightly strange way where you save data in HTML, and then read the HTML to do some more stuff. I wouldn't use HTML as a storage place - just use variables like you would for most other things.
Try this:
$.ajax({
url: "item_query.php",
...
success: function (items) {
for (var i = 0; i < items.length; i++) {
var author = items[i].creator;
var authors;
// insert code here to generate authors from author.split(',') .
// authors should look something like this: [{author: 'http://minerva.atcult.it/rdf/47734211-2637-3895-a690-4f33412931ec'}] .
$.ajax({
url: "author_query.php",
type: "GET",
data: JSON.stringify(authors),
...
success: function (auth_json) {
...
},
error: function () {
console.log('Error 1');
}
});
$("#items-list").append(
'<li class="item">' +
'<div class="item-photo-container">' +
'<img src=images/item_126.jpg>' +
"</div><!--end item-photo-container-->" +
'<div class="item-info">' +
'<ul>' +
'<li><a><h3 class="item-name">' + items[i].title + '</h3></a></li>' +
'<li class="auth-name">' + items[i].creator+ '</li>' +
'<li>' + items[i].issued + '</li>' +
'</ul>' +
'</div><!--end item-info-->' +
'</li><!--end item-->'
);
}
}
});

I make the first call to retrieve the item infos asynchronous and the nested that search for the authors name synchronous. In this way I solved the problem.
For sure it is not the best solution, and it needs a quite long,but acceptable, time (<1 second) to load the content.
JS SCRIPT
$(document).ready(function () {
$("#submit").on("tap", function () {
var item = document.getElementById("search").value;
$.ajax({
url: "item_query.php",
type: "GET",
data: 'item=' + item,
dataType: "json",
success: function (items) {
for (var i = 0; i < items.length; i++) {
var authors_names=' ';
var authors= JSON.stringify(items[i]);
if(authors.indexOf('creator')!=-1){
if(authors.charAt(authors.indexOf('"creator":')+'"creator":'.length)!='[')
authors=authors.substring(authors.indexOf('"creator":"'),authors.indexOf('"',authors.indexOf('"creator":"')+'"creator":"'.length)+1);
else
authors=authors.substring(authors.indexOf('"creator"'),authors.indexOf(']',authors.indexOf('"creator"'))+1);
authors='{'+authors+'}';
//console.log(authors);
$.ajax({
url: "author_query_v3.php",
type: "GET",
data: 'authors='+authors,
dataType:"json",
async:false,
success: function (auth_json) {
authors=[];
authors=auth_json;
var author;
for(var j=0;j<authors.length;j++){
author=JSON.parse(authors[j]);
authors_names+=author.name+" | ";
}
console.log(authors_names);
},
error: function(jqXHR, textStatus, errorThrown) {
console.log(jqXHR+' '+textStatus+ ' '+errorThrown);
}
});
}
else{
authors_names='Unknown';
}
$("#items-list").append(
'<li class="item">' +
'<div class="item-photo-container">' +
'<img src=images/item_126.jpg>' +
"</div><!--end item-photo-container-->" +
'<div class="item-info">' +
'<ul>' +
'<li><a><h3 class="item-name">' + items[i].title + '</h3></a></li>' +
'<li class="auth-name">' + authors_names+ '</li>' +
'<li>' + items[i].issued + '</li>' +
'</ul>' +
'</div><!--end item-info-->' +
'</li><!--end item-->'
);
}
}
});
});
});
PHP SCRIPT
<?php
require 'vendor/autoload.php';
$auth=$_GET['authors'];
$client = new MongoDB\Client("mongodb://localhost:27017");
$db=$client->galileo;
$collection=$db->persons;
$auth=json_decode($auth);
$auth=$auth->creator;
if(is_array($auth)) {
foreach ($auth as $a) {
$document = $collection->findOne(['#id' => $a], ['projection' => ['_id' => 0, 'name' => 1]]);
$auth_json[] = (MongoDB\BSON\toJSON(MongoDB\BSON\fromPHP($document)));
}
}
else{
$document=$collection->findOne(['#id'=>$auth],['projection'=>['_id'=>0,'name'=>1]]);
$auth_json[]=( MongoDB\BSON\toJSON(MongoDB\BSON\fromPHP($document)));
}
echo(json_encode($auth_json));
?>

How to speed up my Ajax call when there are multiple same ajax call made on a page?

When the page loads, I am also dynamically creating a block . I am using ajax call to go and fetch data from another page and then populating it and creating my structure that is then added to a particular dom element. However, the problem is when I do this several times on the page during page loads, it takes quite some time for all Ajax call to finish. Do you know how I can speed up the ajax call?
$('.content-tile').each(function (idx, ele) {
// Step 1: Get the stuffs and add it in the right place on page load
var node_id = $(ele).find('article').attr('data-history-node-id');
$.get('/node/' + node_id , function (data) {
var $title = $(data).find('.title').text();
var $summary = $(data).find('.article__body').text();
var $ctaText = $(data).find('.article__field-read-more-text').text();
var $redirectToFile = $(data).find('.article__field-nova-redirect-to-file').find('a').attr('href');
var $redirectToLink = $(data).find('.article__field-redirect-link').find('a').attr('href');
// Either redirect to file or redirect to link in the order
var $ctaLinkHref = $redirectToFile;
if ($redirectToLink) {
$ctaLinkHref = $redirectToLink;
}
var $contentHover = "<a class='content-added contenthover hoveredLink' href= " + $ctaLinkHref + "></a>";
$(ele).find('article').after($contentHover); // Add the div that will be targeted for the hover
var $contentHoverHeader = "<h2 class='contenthover__header'>" + $title + '</h2>';
var $contentHoverContent = "<p class='contenthover__content'>" + $summary + '</p>';
var $contentHoverLink = "<a class='contenthover__link' href=" + $ctaLinkHref + '>' + $ctaText + '</a>';
$(ele).find('.contenthover').append($contentHoverHeader, $contentHoverContent, $contentHoverLink);
});
});

As Rory mentioned, instead of calling multiple times, just create the single object, post it back and return all the related data in one go.
// construct the array
var nodes = []
$('.content-tile').each(function (idx, ele) {
var node_id = $(ele).find('article').attr('data-history-node-id');
nodes.push(node_id);
}
// call ajax now
$.ajax({
url: "/node/RetrieveDataByNodes", //the new method which can accept the array and return data
data: JSON.stringify(nodes),
type: 'GET',
dataType: 'json'
}).done(function(result) {
$.each(result, function (k, v) {
//do something for each value
console.log(v);
}
});

Retrieving data from myapifilms.com api

I am following a tutorial on YouTube showing how to get data from the myapifilms.com api and I am having trouble rendering the data to HTML. Currently my ajax call is working and the data is showing in the console. The problem I am having is getting the data to show on the page itself. I searched through the question already asked but had no luck. Here's my js code so far:
$(document).ready(function(){
$("#searchMovie").click(searchMovie);
var movieTitle = $("#movieTitle");
var table = $("#results");
var tbody = $("#results tbody"); //table.find("tbody");
function searchMovie() {
var title = movieTitle.val();
$.ajax({
url: "http://www.myapifilms.com/imdb/idIMDB?title="+ title +"&token= + token goes here +&format=json&language=en-us&aka=0&business=0&seasons=0&seasonYear=0&technical=0&filter=2&exactFilter=0&limit=1&forceYear=0&trailers=0&movieTrivia=0&awards=0&moviePhotos=0&movieVideos=0&actors=0&biography=0&uniqueName=0&filmography=0&bornAndDead=0&starSign=0&actorActress=0&actorTrivia=0&similarMovies=0&adultSearch=0&goofs=0&quotes=0&fullSize=0&companyCredits=0",
dataType: "jsonp",
success: renderMovies
})
function renderMovies(movies) {
console.log(movies);
tbody.empty();
for(var m in movies) {
var movie = movies[m];
var title = movie.title;
var plot = movie.simplePlot;
var posterUrl = movie.urlPoster;
var imdbUrl = movie.urlIMDB;
var tr = $("<tr>");
var titleTd = $("<td>").append(title);
var plotTd = $("<td>").append(plot);
tr.append(titleTd);
tr.append(plotTd);
tbody.append(tr);
}
}
}
});
I feel like I am so close but can't quite figure what I am missing. Again I was following a tutorial so if there's a better way to accomplish this goal I'm definitely open to suggestions.
Update:
I changed my code to this and I'm getting undefined in the browser. I changed the for loop to this
success: function (movies) {
console.log(movies);
tbody.empty();
for (var m in movies) {
$(".movies").append("<h3>"+ movies[m].title +"</h3>");
$(".movies").append("<h3>"+ movies[m].plot +"</h3>");
}
}

I figured out a solution, instead of using myapifilms, I used the tmdb api instead. Changing my code to this worked:
var url = 'http://api.themoviedb.org/3/',
mode = 'search/movie?query=',
input,
movieName,
key = 'myapikey';
//Function to make get request when button is clicked to search
$('button').click(function() {
var input = $('#movie').val(),
movieName = encodeURI(input);
$.ajax({
type: 'GET',
url: url + mode + input + key,
async: false,
jsonpCallback: 'testing',
contentType: 'application/json',
dataType: 'jsonp',
success: function(json) {
console.dir(json.results);
for (var i = 0; i < json.results.length; i++){
var result = json.results[i];
$(".moviesContainer").append('<div class="movies col-md-12">'+
'<img class="poster" src="http://image.tmdb.org/t/p/w500'+ result.poster_path +'" />'
+'<h3>'+ result.title +'</h3>'
+'<p><b>Overview: </b>'+ result.overview +'</p>'
+'<p><b>Release Date: </b>'+ result.release_date +'</p>'
+'</div>');
}
},
error: function(e) {
console.log(e.message);
}
});
});

Removing HTML code from a javaScript array?

Hi I have the following code in a javaScript file called songs:
var marchMD = new Array();
marchMD[0] = ["Save the Best for Last - Vanessa Williams"];
marchMD[1] = ["Informer - Snow"];
marchMD[2] = ["The Sign - Ace of Base"];
for (var i=0;i<marchMD.length; i++) {
songList = songList + '<p>' + marchMD[i] + '</p>';
}
$('#songs').html(songList);
Once this has been loaded, the follow javaScript in the file youtube reacts with the code above:
$(document).ready(function() {
$('#songs p').click(function(e) {
var $el = $(e.currentTarget);
var search = $el.html();
//alert(search);
//return;
var keyword = encodeURIComponent(search);
var yt_url = 'http://gdata.youtube.com/feeds/api/videos?q=' + keyword + '&format=5&max-results=1&v=2&alt=jsonc';
$.ajax({
type:"GET",
url: yt_url,
dataType: "jsonp",
success: function(response) {
if(response.data.items) {
$.each(response.data.items, function(i, data) {
var video_id = data.id;
var video_frame = "<iframe width='420' height='315' src='http://www.youtube.com/embed/" + video_id + "' frameborder='0' type='text/html'></iframe>";
$("#ytVid").html(video_frame);
});
} else {
$("#ytVid").hmtl("<div id='no'> No Video</div>");
}
}
});
});
});
The alert that I have in the code above was a test to see if it would return anything and it doesn't. However, if I remove the href html tag from the code this works. The reason I have it is so when someone clicks one of the songs, it takes them to the top of the page to view that song in youtube.
Thanks

If you know that the element that contains your link will only ever contain your link, you could use text() to strip out the HTML formatting, like this:
var search = $el.text();

When you have the <a> in there, var search = $el.html(); includes the tag as well, not just the text. Try this:
$('#songs p').click(function(e) {
var search = $(this).find('a').html();

Develop Reference

JavaScript is the programming language of the Web.

How to send django url with parameters to ajax request? - javascript

Related

Highlight word and send GET request

Communication beetween Javascript and PHP scripts in web app

How to speed up my Ajax call when there are multiple same ajax call made on a page?

Retrieving data from myapifilms.com api

Removing HTML code from a javaScript array?

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