I am using Ajax to add contents on my database. And here's the code:
function addToFavorites(){
var recipe_id = $("#recipe_id").val();
var url = connect_url+'addFavorite.php?user_id='+user_id+'&recipe_id='+recipe_id;
$.ajax({
type: 'POST',
data: [{
user_id: user_id,
recipe_id: recipe_id
}],
url: url,
async: true,
jsonpCallback: 'userCallback',
contentType: "application/json",
dataType: 'jsonp',
success: function (data) {
alert("HELLO!!!");
},
error: function (e) {
alert("ERROR!");
}
});
}
The Ajax call was successful and I was able to add records on the database but I'm just wondering why is it not displaying the alert message if the calling was successful? Is there something wrong with my code? Or is there something wrong with my understanding? Thanks!
you must give a response with some info to the ajax or it won't know the response succeeded
Related
I'm trying to perform an AJAX post but I keep getting a null FromBody in my .NET controller. I think it has to do with how I'm formatting my AJAX post.
When I attempt to post with AJAX I get a null FromBody.
var data = {
Date: "2016-12-01",
BurnIdx: 23,
BurnStatIdx1: 3,
BurnStatIdx2: 3,
BurnStatIdx3: 3,
BurnSevIdx: 5,
WorkOrder: 32426,
Comment: "Hi"
};
$('#submit').on('click',function () {
$.ajax({
type: 'POST',
url: 'Home/BurnerMapUpdate',
dataType: 'json',
contentType: 'application/json',
data: data,
success: function (result) {
console.log('Data received');
console.log(result);
}
});
});
However, when I attempt a post in Postman it's successful.
Figured out my problem. Needed to use JSON.stringify on my data.
$('#submit').on('click',function () {
$.ajax({
type: 'POST',
url: 'Home/BurnerMapUpdate',
dataType: 'json',
contentType: 'application/json',
data: JSON.stringify(data),
success: function (result) {
console.log('Data received');
console.log(result);
}
});
Not only the JSON.stringify().
If your data don't match with csharp class data it doesn't receive anything.
Like if you define in the class a field with int type, and send it in the json like "1", it happens to receive the whole data as null
I know you are already figured out of this problem. But I faced with the same just right now. My mistake was I used BODY parameter instead DATA in ajax request.
My Invalid ajax:
function sendRequest(url, method, body, callbackOk, callbackFail) {
$.ajax({
url: url,
body: JSON.stringify(body),
method: method,
contentType: 'application/json; charset=utf-8',
success: callbackOk,
error: callbackFail
})
Valid:
function sendRequest(url, method, body, callbackOk, callbackFail) {
$.ajax({
url: url,
data: JSON.stringify(body),
method: method,
contentType: 'application/json; charset=utf-8',
success: callbackOk,
error: callbackFail
})
}
I have this method:
var chineseCurrency = getChinese();
function getChinese(){
return $.ajax({
context: this,
type: 'GET',
dataType: 'json',
url: "https://www.cryptonator.com/api/ticker/usd-cny"
});
}
That is what printed when console.log(chineseCurrency);:
I am not able to make chineseCurrency equal to "price", so it would be "6.80071377". How can I do that? Tried chineseCurrency.responseText, nope, chineseCurrency['responseText'], nope. Tried to JSON.parse(chineseCurrency), nope. Nothing works!
Sorry if repeated, couldn't find any answer at Stackoverflow.
How do I return the response from an asynchronous call?
Data that is received as response to asynchronous ajax call cannot be returned from the function that calls $.ajax. What you are returning is XMLHttpRequest object (see http://api.jquery.com/jquery.ajax/) that is far from the desired data.
var chineseCurrency = null;
function getChinese(){
return $.ajax({
context: this,
type: 'GET',
dataType: 'json',
url: "https://www.cryptonator.com/api/ticker/usd-cny",
success: function(data) {
alert("success1: chineseCurrency=" + chineseCurrency);
chineseCurrency = data.ticker.price;
alert("success2: chineseCurrency=" + chineseCurrency);
// do what you need with chineseCurrency
}
});
}
You are not taking the data from that is returned from the Ajax call. instead you are just returning the ajax object.
Change your code to :
$.ajax(
{
context: this,
type: 'GET',
dataType: 'json',
url: "https://www.cryptonator.com/api/ticker/usd-cny"
data :{},
error : function(data)
{
console.log('error occured when trying to find the from city');
},
success : function(data)
{
console.log(data); //This is what you should return from the function.
}
});
Hello guys i have the next ajax call for login. I serialize the form and send the data to server and return redirect url link. My problem is that my url after post is like
http://localhost:50802/?username=&password= and not http://localhost:50802/Home
$.ajax({
type: "POST",
url: "Login/Login",
dataType: 'json',
contentType: "application/json; charset=utf-8",
data: loginJson,
cache: true,
async: false,
complete: function (result) {
alert(result.link);
window.location.replace = "/Home/Index";
},
error: function () {
$("#username").val("");
$("#password").val("");
alert("Wrong Username or Password!");
}
}); //end ajax call
It looks like you wrote this $.ajax call in the .click event of a submit button or in the .submit event of a form without canceling the default action by returning false from the callback or by calling preventDefault on the argument. Here's how your code should look like:
$('#id_of_your_form').submit(function(e) {
e.preventdefault(); // <-- That's what I am talking about and what you forgot
$.ajax({
type: "POST",
url: "Login/Login",
dataType: 'json',
contentType: "application/json; charset=utf-8",
data: loginJson,
cache: true,
async: false,
complete: function (result) {
window.location.replace = "/Home/Index";
},
error: function () {
$("#username").val("");
$("#password").val("");
alert("Wrong Username or Password!");
}
}); //end ajax call
});
Also async: false,????? You know what this does, do you? That's not AJAX. That's a blocking synchronous call to your webserver during which the client browser would be frozen like during the Ice Age 2 ruining all user experience.
Try returning false at the end of your submit function
$('#id_of_your_form').submit(function(e) {
$.ajax({
type: "POST",
url: "Login/Login",
dataType: 'json',
contentType: "application/json; charset=utf-8",
data: loginJson,
cache: true,
async: false,
complete: function (result) {
window.location = "/Home/Index";
},
error: function () {
$("#username").val("");
$("#password").val("");
alert("Wrong Username or Password!");
}
}); //end ajax call
return false; });
Another option would of course be to return the correct redirectlink from the controller instead of overriding it in the java script.
I am trying to submit a form with the user's inserted data and get the html back from the page called (update.asp).
How do I get the html response and how do I write it to a div on the page? The response would be "success".
If my page throws a 500 or other type of error, how can I handle that?
$('input#btnUpdate').click( function() {
$.ajax({
url: 'update.asp',
type: 'post',
dataType: 'json',
data: $('form#myForm').serialize(),
success: function(data) {
// how do i catch the response? is this the right place?
},
error: function(data) {
// how do I catch the error code here?
}
});
The response from the server in both cases would be passed to the callback as the data variable in your example. Try using console.log(data) inside of your callbacks to see the result in your developer console.
$('input#btnUpdate').click( function() {
$.ajax({
url: 'update.asp',
type: 'post',
dataType: 'json',
data: $('#myForm').serialize(),
success: function(response) {
$("#yourDIV").html(response);
},
error: function (xhr, ajaxOptions, thrownError) {
alert(thrownError); //output, 500
}
});
});
More on this: ajax()
This works fine:
jQuery('#my_get_related_keywords').click(function() {
if (jQuery('#my_keyword').val() == '') return false;
jQuery.getJSON("http://boss.yahooapis.com/ysearch/web/v1/"
+jQuery('#my_keyword').val()+"?"
+"appid=myAppID"
+"&lang=en"
+"&format=json"
+"&count=50"
+"&view=keyterms"
+"&callback=?",
function (data) {//do something}
This returns 400 Bad Request (Just a reformulation of the above jQuery using .ajax to support error handling).
jQuery('#my_get_related_keywords').click(function()
{
if (jQuery('#my_keyword').val() == '') return false;
jQuery('#my_loader').show();
jQuery.ajax(
{
url: "http://boss.yahooapis.com/ysearch/web/v1/"
+jQuery('#my_keyword').val()+"?"
+"appid=myAppID"
+"&lang=en"
+"&format=json"
+"&count=50"
+"&view=keyterms"
+"&callback=?",
success: function(data)
{//do something}
I think you just need to add 2 more options (contentType and dataType):
$('#my_get_related_keywords').click(function() {
$.ajax({
type: "POST",
url: "HERE PUT THE PATH OF YOUR SERVICE OR PAGE",
data: '{"HERE YOU CAN PUT DATA TO PASS AT THE SERVICE"}',
contentType: "application/json; charset=utf-8", // this
dataType: "json", // and this
success: function (msg) {
//do something
},
error: function (errormessage) {
//do something else
}
});
}
Add this to your ajax call:
contentType: "application/json; charset=utf-8",
dataType: "json"
Late answer, but I figured it's worth keeping this updated. Expanding on Andrea Turri answer to reflect updated jQuery API and .success/.error deprecated methods.
As of jQuery 1.8.* the preferred way of doing this is to use .done() and .fail(). Jquery Docs
e.g.
$('#my_get_related_keywords').click(function() {
var ajaxRequest = $.ajax({
type: "POST",
url: "HERE PUT THE PATH OF YOUR SERVICE OR PAGE",
data: '{"HERE YOU CAN PUT DATA TO PASS AT THE SERVICE"}',
contentType: "application/json; charset=utf-8",
dataType: "json"});
//When the request successfully finished, execute passed in function
ajaxRequest.done(function(msg){
//do something
});
//When the request failed, execute the passed in function
ajaxRequest.fail(function(jqXHR, status){
//do something else
});
});
Be sure and use 'get' or 'post' consistantly with your $.ajax call for example.
$.ajax({
type: 'get',
must be met with
app.get('/', function(req, res) {
===============
and for post
$.ajax({
type: 'post',
must be met with
app.post('/', function(req, res) {
I was getting the 400 Bad Request error, even after setting:
contentType: "application/json",
dataType: "json"
The issue was with the type of a property passed in the json object, for the data property in the ajax request object.
To figure out the issue, I added an error handler and then logged the error to the console. Console log will clearly show validation errors for the properties if any.
This was my initial code:
var data = {
"TestId": testId,
"PlayerId": parseInt(playerId),
"Result": result
};
var url = document.location.protocol + "//" + document.location.host + "/api/tests"
$.ajax({
url: url,
method: "POST",
contentType: "application/json",
data: JSON.stringify(data), // issue with a property type in the data object
dataType: "json",
error: function (e) {
console.log(e); // logging the error object to console
},
success: function () {
console.log('Success saving test result');
}
});
Now after making the request, I checked the console tab in the browser development tool.
It looked like this:
responseJSON.errors[0] clearly shows a validation error: The JSON value could not be converted to System.String. Path: $.TestId, which means I have to convert TestId to a string in the data object, before making the request.
Changing the data object creation like below fixed the issue for me:
var data = {
"TestId": String(testId), //converting testId to a string
"PlayerId": parseInt(playerId),
"Result": result
};
I assume other possible errors could also be identified by logging and inspecting the error object.
Your AJAX call is not completed with the following two params.
contentType: "application/json; charset=utf-8",
dataType: "json"
contentType is the type of data you're sending
dataType is what you're expecting back from the server
In addition try to use JSON.stringify() method. It is used to turn a javascript object into json string.