I'm unable to extract object properties using the . each() method in Jquery. I'm able to view the full response with console.log (result), but I'm unable to extract from that response. I receive an undefined or [Object object] message when I attempt to use result.snippet in the .each method. When I use the .each for other json responses I'm able to extract by using data.value, but for this response it doesn't work.
(function getArticles(){
var url = "https://api.nytimes.com/svc/search/v2/articlesearch.json";
url += '?' + $.param({
'api-key': "",
'q': "obama"
});
$.ajax({
url: url,
type:"GET",
data:{
}
}).done(function(result) {
console.log(result);
$.each(result, function () {
document.write(result.snippet); // This is not working, but works with other json responses from other API's//
})
});
})();
The response you're getting is an object, not an array. You can't iterate over an object. You can iterate over the keys of an object and then reference each key. In either case, you don't need jQuery to do the iteration.
var response = {
"hello": "world",
"foo": "bar"
};
for (var key in response) {
console.log(key, response[key]);
}
In your case, to get to the snippet:
response.docs[0].snippet
You could iterate each document:
response.docs.forEach(function(doc) {
console.log(doc.snippet);
});
i am trying to parse json datalist in ajax success bt it couldnot work. i have passed object containing list of data using json from controller to view,i help to parse json object in ajax success. i have attached my code below.
//return json object from controller
PurchaseDetails pd = new PurchaseDetails();
foreach (DataRow dr in dt.Rows)
{
pd.serialList.Add(new SerialInfo {
Machine_serial_no = dr[0].ToString(), macAddress = dr[1].ToString(), isMacPresent = _TD1.CheckMac(machineTypes_MTId),brandName=obj.brandName,machineName=obj.machineName,MachineModel=obj.MachineModel,modelId=modelId,machineId=obj.machineId,brandId=obj.brandId});
// pd.macaddressList.Add(new MacAddressInfo { MacAddress = dr[1].ToString() });
}
}
}
return Json(new {pd}, JsonRequestBehavior.AllowGet);
return Json(new {pd}, JsonRequestBehavior.AllowGet);
// my ajax code
$.ajax({
url: "/Import/ImportPurchase",
type: "POST",
data: function () {
var data = new FormData();
data.append("file", jQuery("#file").get(0).files[0]);
data.append("machineTypes_MTId", jQuery('#machineTypes_MTId').val());
data.append("modelId", jQuery('#searchValue').val());
data.append("modelName", jQuery('#searchid').val());
return data;
}(),
dataType:"JSON",
contentType: false,
processData: false,
success: function (data) {
alert(data.Machine_serial_no)
Your controller method is returning
return Json(new { serialObj = pd}, JsonRequestBehavior.AllowGet);
which is an object containing a name serialObj
So in the ajax success call back, you would need to access it using
success: function (data) {
var PurchaseDetails = data.serialObj;
Since PurchaseDetails contains a collection named serialList which is a collection of SerialInfo, then to access the value of the first Machine_serial_no, it would be
var serialNo = data.serialObj.serialList[0].Machine_serial_no;
However it would be easier to just use
return Json(pd, JsonRequestBehavior.AllowGet);
If you then want to access each Machine_serial_no property in the collection, use
success: function (data) {
$.each(data.serialList, function(index, item) {
var serialNo = item.Machine_serial_no;
you can use jQuery.parseJSON() to parse ajax response to JSON.
but seeing from your code, seems the response should already be in JSON because dataType parameter is already set to "JSON".
try this:
remove "()" after the ending bracket of function in "data" parameter.
try to console.log(data) and look at the response from your browser console,
the response might not be a valid json string.
If you are looking for convert js array to JSON then just use JSON.stringify() function. This will convert your JS variable data value to JSON format.
You can more find here.
I am a beginner in Javascript. I hope to get some help.
I built a local server using MAMP, and all my files are local. I want to read a value from a json file. This json file(data.json) has only one item {"type":2}, and I only want to use the value(2 in this case). But the value of "type" changes, so Javascript should read it constantly and maybe save it into a var in Javascript.
Can I listen for changes to that file so that I can be sure I always have the most up to date value for type?
I am still not familiar with Javascript. I would really appreciate it if you could give me some specific codes or examples.
//Either
var json = {test:"test"};
console.log(json);
//Access JSON
console.log(json.test);
//Or
$.getJSON( "test.json", function( data ) {
//Assign the json to your JSON variable
json = data;
});
console.log(json);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
JSON can come from anywhere, inbuilt into jquery is parseJSON which will return the json input string as a javascript object.
http://api.jquery.com/jquery.parsejson/
var obj = $.parseJSON( '{ "name": "John" }' );
alert( obj.name === "John" );
where the json can come from anywhere.. an ajax call or where ever else.
$.ajax({
url:'some url',
data: someobject,
type: 'get',
success: function( responseFromServer ){
var obj = $.parseJSON( responseFromServer );
alert( obj.name === "John" );
}
});
Given JSON containing:
[
{"myKey":"A","status":0,"score":1.5},{"myKey":"C","status":1,"score":2},
{"myKey":"D","status":0,"score":0.2},{"myKey":"E","status":1,"score":16},
{"myKey":"F","status":0,"score":0.4},{"myKey":"G","status":1,"score":3}
]
Given JS such:
MyJSON = $.getJSON('http://d.codio.com/hugolpz/getJson--/App/data/statusStarter2.json' );
How to get the JSON's content (stringified) into localStorage.data ?
Note: localStorage.data = JSON.stringify(MyJSON); returns {"readyState":1}, which is not my wish. I looked into jQuery.getJSON/, but I'am quite confused by the function (data).
getJSON works asynchronously and what it returns is AJAX request object. So use success callback function of getJSON to recieve the data
$.getJSON('http://d.codio.com/hugolpz/getJson--/App/data/statusStarter2.json', function(data) {
// do JSON.stringify(data) here
});
Did you try :
localStorage.setItem('data', JSON.stringify(MyJSON));
and
var JSON = localStorage.getItem('data');
and as ajax is async :
$.getJSON('url', function(MyJSON) {
localStorage.setItem('data', JSON.stringify(MyJSON));
});
Been getting a "parsererror" from jquery for an Ajax request, I have tried changing the POST to a GET, returning the data in a few different ways (creating classes, etc.) but I cant seem to figure out what the problem is.
My project is in MVC3 and I'm using jQuery 1.5
I have a Dropdown and on the onchange event I fire off a call to get some data based on what was selected.
Dropdown: (this loads the "Views" from the list in the Viewbag and firing the event works fine)
#{
var viewHtmls = new Dictionary<string, object>();
viewHtmls.Add("data-bind", "value: ViewID");
viewHtmls.Add("onchange", "javascript:PageModel.LoadViewContentNames()");
}
#Html.DropDownList("view", (List<SelectListItem>)ViewBag.Views, viewHtmls)
Javascript:
this.LoadViewContentNames = function () {
$.ajax({
url: '/Admin/Ajax/GetViewContentNames',
type: 'POST',
dataType: 'json',
data: { viewID: $("#view").val() },
success: function (data) {
alert(data);
},
error: function (data) {
debugger;
alert("Error");
}
});
};
The above code successfully calls the MVC method and returns:
[{"ViewContentID":1,"Name":"TopContent","Note":"Content on the top"},
{"ViewContentID":2,"Name":"BottomContent","Note":"Content on the bottom"}]
But jquery fires the error event for the $.ajax() method saying "parsererror".
I recently encountered this problem and stumbled upon this question.
I resolved it with a much easier way.
Method One
You can either remove the dataType: 'json' property from the object literal...
Method Two
Or you can do what #Sagiv was saying by returning your data as Json.
The reason why this parsererror message occurs is that when you simply return a string or another value, it is not really Json, so the parser fails when parsing it.
So if you remove the dataType: json property, it will not try to parse it as Json.
With the other method if you make sure to return your data as Json, the parser will know how to handle it properly.
See the answer by #david-east for the correct way to handle the issue
This answer is only relevant to a bug with jQuery 1.5 when using the file: protocol.
I had a similar problem recently when upgrading to jQuery 1.5. Despite getting a correct response the error handler fired. I resolved it by using the complete event and then checking the status value. e.g:
complete: function (xhr, status) {
if (status === 'error' || !xhr.responseText) {
handleError();
}
else {
var data = xhr.responseText;
//...
}
}
You have specified the ajax call response dataType as:
'json'
where as the actual ajax response is not a valid JSON and as a result the JSON parser is throwing an error.
The best approach that I would recommend is to change the dataType to:
'text'
and within the success callback validate whether a valid JSON is being returned or not, and if JSON validation fails, alert it on the screen so that its obvious for what purpose the ajax call is actually failing. Have a look at this:
$.ajax({
url: '/Admin/Ajax/GetViewContentNames',
type: 'POST',
dataType: 'text',
data: {viewID: $("#view").val()},
success: function (data) {
try {
var output = JSON.parse(data);
alert(output);
} catch (e) {
alert("Output is not valid JSON: " + data);
}
}, error: function (request, error) {
alert("AJAX Call Error: " + error);
}
});
the problem is that your controller returning string or other object that can't be parsed.
the ajax call expected to get Json in return. try to return JsonResult in the controller like that:
public JsonResult YourAction()
{
...return Json(YourReturnObject);
}
hope it helps :)
There are lots of suggestions to remove
dataType: "json"
While I grant that this works it's ignoring the underlying issue. If you're confident the return string really is JSON then look for errant whitespace at the start of the response. Consider having a look at it in fiddler. Mine looked like this:
Connection: Keep-Alive
Content-Type: application/json; charset=utf-8
{"type":"scan","data":{"image":".\/output\/ou...
In my case this was a problem with PHP spewing out unwanted characters (in this case UTF file BOMs). Once I removed these it fixed the problem while also keeping
dataType: json
Your JSON data might be wrong. http://jsonformatter.curiousconcept.com/ to validate it.
Make sure that you remove any debug code or anything else that might be outputting unintended information. Somewhat obvious, but easy to forgot in the moment.
I don't know if this is still actual but problem was with Encoding. Changing to ANSI resolved the problem for me.
If you get this problem using HTTP GET in IE I solved this issue by setting the cache: false.
As I used the same url for both HTML and json requests it hit the cache instead of doing a json call.
$.ajax({
url: '/Test/Something/',
type: 'GET',
dataType: 'json',
cache: false,
data: { viewID: $("#view").val() },
success: function (data) {
alert(data);
},
error: function (data) {
debugger;
alert("Error");
}
});
you should remove the dataType: "json". Then see the magic... the reason of doing such thing is that you are converting json object to simple string.. so json parser is not able to parse that string due to not being a json object.
this.LoadViewContentNames = function () {
$.ajax({
url: '/Admin/Ajax/GetViewContentNames',
type: 'POST',
data: { viewID: $("#view").val() },
success: function (data) {
alert(data);
},
error: function (data) {
debugger;
alert("Error");
}
});
};
incase of Get operation from web .net mvc/api, make sure you are allow get
return Json(data,JsonRequestBehavior.AllowGet);
If you don't want to remove/change dataType: json, you can override jQuery's strict parsing by defining a custom converter:
$.ajax({
// We're expecting a JSON response...
dataType: 'json',
// ...but we need to override jQuery's strict JSON parsing
converters: {
'text json': function(result) {
try {
// First try to use native browser parsing
if (typeof JSON === 'object' && typeof JSON.parse === 'function') {
return JSON.parse(result);
} else {
// Fallback to jQuery's parser
return $.parseJSON(result);
}
} catch (e) {
// Whatever you want as your alternative behavior, goes here.
// In this example, we send a warning to the console and return
// an empty JS object.
console.log("Warning: Could not parse expected JSON response.");
return {};
}
}
},
...
Using this, you can customize the behavior when the response cannot be parsed as JSON (even if you get an empty response body!)
With this custom converter, .done()/success will be triggered as long as the request was otherwise successful (1xx or 2xx response code).
I was also getting "Request return with error:parsererror." in the javascript console.
In my case it wasn´t a matter of Json, but I had to pass to the view text area a valid encoding.
String encodedString = getEncodedString(text, encoding);
view.setTextAreaContent(encodedString);
I have encountered such error but after modifying my response before sending it to the client it worked fine.
//Server side
response = JSON.stringify('{"status": {"code": 200},"result": '+ JSON.stringify(result)+'}');
res.send(response); // Sending to client
//Client side
success: function(res, status) {
response = JSON.parse(res); // Getting as expected
//Do something
}
I had the same problem, turned out my web.config was not the same with my teammates.
So please check your web.config.
Hope this helps someone.
I ran into the same issue. What I found to solve my issue was to make sure to use double quotes instead of single quotes.
echo "{'error':'Sorry, your file is too large. (Keep it under 2MB)'}";
-to-
echo '{"error":"Sorry, your file is too large. (Keep it under 2MB)"}';
The problem
window.JSON.parse raises an error in $.parseJSON function.
<pre>
$.parseJSON: function( data ) {
...
// Attempt to parse using the native JSON parser first
if ( window.JSON && window.JSON.parse ) {
return window.JSON.parse( data );
}
...
</pre>
My solution
Overloading JQuery using requirejs tool.
<pre>
define(['jquery', 'jquery.overload'], function() {
//Loading jquery.overload
});
</pre>
jquery.overload.js file content
<pre>
define(['jquery'],function ($) {
$.parseJSON: function( data ) {
// Attempt to parse using the native JSON parser first
/** THIS RAISES Parsing ERROR
if ( window.JSON && window.JSON.parse ) {
return window.JSON.parse( data );
}
**/
if ( data === null ) {
return data;
}
if ( typeof data === "string" ) {
// Make sure leading/trailing whitespace is removed (IE can't handle it)
data = $.trim( data );
if ( data ) {
// Make sure the incoming data is actual JSON
// Logic borrowed from http://json.org/json2.js
if ( rvalidchars.test( data.replace( rvalidescape, "#" )
.replace( rvalidtokens, "]" )
.replace( rvalidbraces, "")) ) {
return ( new Function( "return " + data ) )();
}
}
}
$.error( "Invalid JSON: " + data );
}
return $;
});
</pre>