I have a beginner level Json question with MVC.net (I've never really used jquery or json) so please excuse me if I ask something stupid.
I have a javascript file with the below
<script>
function refreshMovies() {
//$.getJSON("/Home/Refresh", showMovies);
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: "/Home/Refresh",
success: showMovies
});
}
function showMovies(movie) {
var frag = "<ul>";
frag += "<li>" + movie[0] + " - " + movie[1] + "</li>";
frag += "</ul>";
alert(frag);
$("#divMovies").html(frag);
}
</script>
My Home controller looks like:
public ActionResult Refresh()
{
return Json(GetMovies()); // Method Returns IList<Movies>
}
The question I have is the frag on the alert and when the UL is displayed on the page is always empty.
However, firebug does show that the post request is returning the json, so maybe something is going wrong with showMovies()?
You say that firebug reports that you are getting your JSon correctly, otherwise I'd ask you whether you decorated the action with [HttpPost], as you are using the POST method.
Does the alert() currently display the correct HTML? If so, does the div have the id="divMovies" attribute (note, no # character here!).
Otherwise, try to move the alert() on top of the showMovies: does it show anything?
Related
The expectation is that $(".post-title").append(postTitle); will return the title of that post, as will postBody. Yet when I console.log these variables > undefined is returned.
$.ajax({
url: "http://api.tumblr.com/v2/blog/ohc-gallery.tumblr.com/posts?api_key=***",
dataType: 'jsonp',
success: function(res){
var postings = res.response.posts;
var postTitle = "";
var postBody = "";
$(".post-title").append(postTitle);
$(".post-body").append(postBody);
for (var i in postings){
postTitle = postings[i].title;
postBody = postings[i].body;
}
console.log("postBody: " + postBody);
}
});
Am I missing something basic regarding Javascript closures... I really don't know right now. I simply want to loop through created post data for later display.
Github JS code- https://github.com/mrcn/ohc/blob/master/js/tumblr.js
Github HTML code- https://github.com/mrcn/ohc/blob/master/index-posting.html#L82-L89
I got it. The problem was with how I intended to display this information on the website, and I had to alter the code accordingly. The idea was to display paired blog post titles and entries. The problem was all titles were appearing together, and all bodies were appearing together- not paired off respectively.
The updated code is more along the lines of --
Javascript --
//use $.each() or Array.forEach
$.each(postings, function (i, post) {
$(".post ").append("<h3>" + post.title + "</h3>" + post.body + "<br><br>");
});
}
});
HTML --
<div class="post-wrap"><!--post-wrap-->
<div class="post">
</div>
</div><!--post-wrap-->
The for..in is used to iterate over an object... posts is an array for you can use the normal for (var i=0;i<x;i++) loop or any other iteration methods like $.each() or Array.forEach()
$.ajax({
url: 'http://api.tumblr.com/v2/blog/ohc-gallery.tumblr.com/posts?api_key=***',
dataType: 'jsonp',
success: function (res) {
var postings = res.response.posts;
var postTitle = '';
var postBody = '';
//use $.each() or Array.forEach
$.each(postings, function (i, post) {
$(".post-title ").append(post.title);
$(".post-body ").append(post.body);
})
}
});
Not every post type supports title or body. You currently have three posts, two text and one photo. The photo post type only support photos and caption, which is causing the undefined.
Check the API for more details: https://www.tumblr.com/docs/en/api/v2
Hi I'm new in Ajax and django and I want to refresh my form. I try some code but it didn't work. I'm sure what I want to do is very basic.
Here my html:
<div class="row" style="padding-top:20px;">
<div class="col-md-12" id="testAjax">
{% load crispy_forms_tags %}
{% crispy form %}
</div>
</div>
I want to refresh my form in the div testAjax.
Here my view:
def createPin(request):
error = False
if request.method == "POST":
form = CreatePinForm(request.POST)
if form.is_valid():
pin = form.save(commit=False)
pin.customer = request.user.customer
pin.save()
msg = "pin saved"
return redirect('/pin/CreatePin', {'form': form, 'msg': msg})
else:
error = True
else:
form = CreatePinForm()
return render(request, 'createPin.html', {'form': form, 'error': error,})
My Ajax:
function refresh()
{
$form=$('#createPin');
var datastring = $form.serialize();
$.ajax({
type: "POST",
url: '/pin/CreatePin/',
dataType: 'html',
data: datastring,
success: function(result)
{
/* The div contains now the updated form */
$('#testAjax').html(result);
}
});
}
Thanks alot for your help.
When I need to do some operations and I don't want to reload the page I use a JQuery call to Ajax, I make the pertinent operations in AJAX and then receive the AJAX response in the JQuery function without leaving or reloading the page. I'll make an easy example here for you to understand the basics of this:
JQuery function, placed in the template you need
function form_post(){
//You have to get in this code the values you need to work with, for example:
var datastring = $form.serialize();
$.ajax({ //Call ajax function sending the option loaded
url: "/ajax_url/", //This is the url of the ajax view where you make the search
type: 'POST',
data: datastring,
success: function(response) {
result = JSON.parse(response); // Get the results sended from ajax to here
if (result.error) { // If the function fails
// Error
alert(result.error_text);
} else { // Success
//Here do whatever you need with the result;
}
}
}
});
}
You have to realize that I cannot finish the code without knowing what kind of results you're getting or how do you want to display them, so you need to retouch this code on your needs.
AJAX function called by JQuery
Remember you need to add an url for this Ajax function in your urls.py something like:
url(r'^/ajax_url/?$', 'your_project.ajax.ajax_view', name='ajax_view'),
Then your AJAX function, it's like a normal Django View, but add this function into ajax.py from django.core.context_processors import csrf from django.views.decorators.csrf import csrf_exempt from django.utils import simplejson
#csrf_exempt
def ajax_view(request):
response = []
#Here you have to enter code here
#to receive the data (datastring) you send here by POST
#Do the operations you need with the form information
#Add the data you need to send back to a list/dictionary like response
#And return it to the JQuery function `enter code here`(simplejson.dumps is to convert to JSON)
return HttpResponse(simplejson.dumps(response))
So, without leaving the page you receive via javascript a list of items that you sended from ajax view.
So you can update the form, or any tag you need using JQuery
I know that this can be so confusing at the beginning but once you are used to AJAX this kind of operations without leaving or reloading the page are easy to do.
The basics for understanding is something like:
JQuery function called on click or any event you need
JQuery get some values on the template and send them to AJAX via
POST
Receive that information in AJAX via POST
Do whatever you need in AJAX like a normal DJango view
Convert your result to JSON and send back to the JQuery function
JQuery function receive the results from AJAX and you can do
whatever you need
I'm new with ajax and thought i'd be a fun experiment to put into my project. I've created my own lightbox type feature to send a message on a website I'm creating. When the user clicks "Send Message", that's when the lightbox appears, and at the top I'm trying to get it to say "Send message to User", where User is the name of the user they're sending a message too. My lightbox html elements are actually on a seperate webpage, which is why I'm using ajax. this is what I have so far, and can't seem to figure out what the problem is:
user.php page
<div id = "pageMiddle"> // This div is where all the main content is.
<button onclick = "showMessageBox(UsersName)">Send Message</button>
</div>
Note: The username passes correctly into the javascript function, I have checked that much.
main.js page
function showMessageBox(user){
alert(user); // where i checked if username passes correctly
var ajaxObject = null;
if (window.XMLHttpRequest){
ajaxObject = new XMLHttpRequest();
}else if (window.ActiveXObject){
ajaxObject = new ActiveXObject("Microsoft.XMLHTTP");
}
if (ajaxObject != null){
ajaxObject.open("GET", "message_form.php", true);
ajaxObject.send("u="+user);
}else{
alert("You do not have a compatible browser");
}
ajaxObject.onreadystatechange = function(){
if (ajaxObject.readyState == 4 && ajaxObject.status == 200){
document.getElementById("ajaxResult").innerHTML = ajaxObject.responseText;
// use jquery to fade out the background and fade in the message box
$("#pageMiddle").fadeTo("slow", 0.2);
$("#messageFormFG").fadeIn("slow");
}
};
}
message_form.php page
<div id = "messageFormFG">
<div class = "messageFormTitle">Sending message to <?php echo $_GET['u']; ?></div>
</div>
Note: When accessing this page directly through the URL, giving it a parameter of u and a value, it displays correctly
Use jQuery.ajax();
http://api.jquery.com/jQuery.ajax/
$.ajax({
type: "GET",
url: "message_form.php",
data: { name: "John", location: "Boston" }
}).done(function( msg ) {
alert( "Data Saved: " + msg );
});
freakish way to do it (old school) :)
anyway i think the problem may be that you are loading an entire html page to a div! meaning tags and stuff, a good way to understand what's wrong would be to use a debugger and see what comes in ajaxObject.responseText.
Hope this helps.
Btw convert to jQuery ajax!! saves you loads of time =)
I believe that you need to add a request header prior to sending your data. So you'd have this:
ajaxObject.open("GET", "message_form.php", true);
ajaxObject.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
ajaxObject.send("u="+encodeURIComponent(user));
Instead of what you have.
However, it may be a good idea to allow a library to do this for you. It looks like you already have jQuery loaded, so why not let it handle your AJAX requests instead?
I figured it out after watching some ajax tutorials from bucky :) aka thenewboston. If I'm using the GET method, i just had to add the parameter to the end of the url in the .open function, instead of passing it through the send function (like you would a post method).
if you want to send number of field values using ajax.you can use serilalize function.
Example:
jQuery.ajax({
url: 'filenamehere.php',
type: 'post',
data: $("#formidhere").serialize(),
success: function(data){
..//
}
});
I'm creating a webproject in pyramid where I'd like to update a table every few secondes. I already decided to use ajax, but I'm stuck on something.
On the client side I'm using the following code:
function update()
{
var variable = 'variable ';
$.ajax({
type: "POST",
url: "/diagnose_voorstel_get_data/${DosierID}",
dataType: "text",
data: variable ,
success: function (msg) {
alert(JSON.stringify(msg));
},
error: function(){
alert(msg + 'error');
}
});
}
Pyramid side:
#view_config(route_name='diagnose_voorstel_get_data', xhr=True, renderer='string')
def diagnose_voorstel_get_data(request):
dosierid = request.matchdict['dosierid']
dosieridsplit = dosierid.split
Diagnoses = DBSession.query(Diagnose).filter(and_(Diagnose.code_arg == str(dosieridsplit[0]), Diagnose.year_registr == str(dosieridsplit[1]), Diagnose.period_registr == str(dosieridsplit[2]), Diagnose.staynum == str(dosieridsplit[3]), Diagnose.order_spec == str(dosieridsplit[4])))
return {'Diagnoses ' : Diagnoses }
Now I want to put this data inside a table with zpt using the tal:repeat statement.
I know how to use put this data in the table when the page loads, but I don't know how to combine this with ajax.
Can anny1 help me with this problem ? thanks in adance.
You can do just about anything with AJAX, what do you mean "there's no possibility"? Things become much cleaner once you clearly see what runs where and in what order - as Martijn Pieters points out, there's no ZPT in the browser and there's no AJAX on the server, so the title of the question does not make much sense.
Some of the options are:
clent sends an AJAX request, server does its server-side stuff, in the AJAX call success handler the client reloads the whole page using something like window.location.search='ts=' + some_timestamp_to_invalidate_cache. The whole page will reload with the new data - although it works almost exactly like a normal form submit, not much sense using AJAX like this at all.
client sends an AJAX request, server returns an HTML fragment rendered with ZPT which client then appends to some element on your page in the AJAX success handler:
function update()
{
var variable = 'variable ';
$.post("/diagnose_voorstel_get_data/${DosierID}")
.done(function (data) {'
$('#mytable tbody').append(data);
});
}
client sends an AJAX request, server returns a JSON object which you then render on the client using one of the client-side templating engines. This probably only make sense if you render your whole application on the client and the server provides all data as JSON.
So I have a normal form with 1 textarea and two hidden inputs, which I would like to post via AJAX to a CI controller I have that inserts the information into the database.
The problem I'm having is that a) the page action is still called and the output of the controller is displayed and b) because the initial AJAX request is still processed plus the extra loading of the action target the information gets inserted twice.
This is my javascript code:
$(document).ready(function() {
$("#submit-comment").click(function(){
var post_id = <?=$p->id?>;
var user_id = <?=$user->id?>;
var content = $("textarea#content").val();
if(content == '') {
alert('Not filled in content');
return false;
}
$.ajax({
type: "POST",
url: "<?=site_url('controller/comment')?>",
data: "post_id="+post_id+"&user_id="+user_id+"&content="+content,
success: function(msg){
alert(msg);
}
});
});
});
I have tried doing
...click(function(e)... ... e.preventDefault
with no luck.
What am I doing wrong? :P
Thanks
Ps. All the information is processed properly and accessed, it's just the preventing the form which is screwing it up..
Just realised I was using a input type="submit", rather than input type="button".
Doh!