I have to get data from Restful API and I want to show in the HTML by JavaScript, I have to get the data as follows:
function loadInfo(){
$http({
method:'GET',
url:'https://happy_ending/restful_api/propertyviewset/?format=json',
dataType: "json",
contentType : 'application/json',
}).then(function (json){
// on success
var a = JSON.stringify(json);
console.log(a);
console.log(a['data']);
}, function (json){
alert('No');
})
}
At first, I get the data with some Messy coding, and then I add the code var a = JSON.stringify(json); and the Messy coding is gone, I know I have to change the JSON object to JSON string.
the data structure is shown in the image
Then I want to get the data according to the following ways.Unfortunately, they are both the wrong "undefined"
1.console.log(a['data']); 2.console.log(a.data);
I have two questions :
Q1: I have set the format =json,so I just want to get the data, but In the picture，you can see, the other variables: "status","contentType","headers","dataType", I want to ignore it, what can I set?
Q2: how can I get the value of "id" in the data? I think the above two ways are both wrongs!
Thanks in advance ~ any help is appreciated
Related
Please be patient. This is my first post as far as I remember.
This is a part of my calendar.js script. I'm trying to POST data that I fetch from modal window in index.php to sql.php.
function saveModal() { /*JQuery*/
var current_date_range = $(".modal-select#daterange").val();
var current_room_number = $("#mod-current-room-number").val();
var current_room_state = $("#mod-current-room-state").val();
var myData = {"post_date_range": current_date_range, "post_room_number": current_room_number, "post_room_state": current_room_state};
var myJSON = JSON.stringify(myData);
$.ajax({
type: "POST",
url: "sql.php",
contentType: "application/json; charset=utf-8",
dataType: "json",
async: true,
data: myJSON,
beforeSend: function() {
$("#ajax").html("<div class='loading'><img src='/images/loader.gif' alt='Loading...' /></div>");
},
success: function(result){
$("#ajax").empty();
$("#ajax").html(result);
$("#ajax").fadeIn("slow");
window.location.reload(true);
},
error: function(){
alert(myJSON);
$("#ajax").html("<p class='error'> <strong>Oops!</strong> Try that again in a few moments.</p>");
}
})
}
I get the data just fine (as you can see I have checked in the error: function() with alert(myJSON);). It looks like this: {"post_date_range":"12/19/2018 - 12/28/2018","post_room_number":"118","post_room_state":"3"}. Nevermind that the daterangepicker.js returns dates in the hideous MM/DD/YYYY format, which I would very much like to change to YYYY-MM-DD. The real problem is, the code never gets to success: function().
Now my sql.php is in the same folder as calendar.js and index.php.
In sql.php I try to retrieve those values with:
$currentDateRange = $_REQUEST['post_date_range'];
$currentRoomNumber = intval($_REQUEST['post_room_number']);
$currentRoomState = intval($_REQUEST['post_room_state']);
I have checked many other SO Q&As and none have helped me solve my problem. I don't see any spelling errors. It's not disobeying same origin policy rule. I don't want to use jQuery $.post function. Anyone sees the obvious solution?
You want to send array in post rather than the string so directly send myData to get array value in your PHP file rather converting to JSON string It would work with your current PHP file as you require.
You should specify a POST key for the JSON data string you are sending:
var myJSON = JSON.stringify(myData);
(...)
$.ajax({
(...)
data: 'data=' + myJSON,
You need to parse (decode) this string in your PHP file to be able to use it as an array/object again:
$data = json_decode($_REQUEST['data']);
$currentDateRange = $data['post_date_range'];
$currentRoomNumber = intval($data['post_room_number']);
$currentRoomState = intval($data['post_room_state']);
Also, dataType in jQuery.ajax function is specified as "The type of data that you're expecting back from the server." according to jQuery documentation. As far as I can tell from your code, you might rather expect something else as your response, so try excluding this line.
I am sorry to have burdened you all. It's my third week programming so my lack of knowledge is at fault.
I did not know how dataflow works between AJAX and PHP in the URL...
While I was searching for other errors, I printed or echoed out many different things. The PHP file should echo only 1 thing, although it can be an array with multiple values.
Like this for example:
$return_arr = array("sql"=>$sql1, "result"=>$result, "out"=>$out);
echo json_encode($return_arr);
I appologize again.
End goal: from a given URL (assume same server/domain) that contains some data in this form:
{"foo":6481,"value":13,"thing":"12_3"}
Get JavaScript code to read the data and put it into an array/object so that it can be used to plot the "value" on a graph. The server will automatically update the link with new data, but for now just trying to figure out how to access "value"
To test, I created a .json file and an .html file and am just trying to print '13' from "value" to see how I can access it, but am having trouble getting anything to work. I've spent MANY hours on stack overflow and google trying to figure this out. This is the closest thing to what I thought could help me: How to create JAVASCRIPT ARRAY from external file JSON, but it isn't working
What I've tried for datadata.json:
{"foo":6481,"value":13,"thing":"12_3"}
[{"foo":6481,"value":13,"thing":"12_3"}]
'[{"foo":6481,"value":13,"thing":"12_3"}]'
then for my JS file:
var newArray = new Array ();
$.ajax({
async: false,
url: 'datadata.json',
data: "",
accepts: 'application/json',
dataType: 'json',
success: function(data) {
newArray.push(data.value); //or data.name
}
})
console.log(newArray);
This will print empty brackets, and this error:
SyntaxError: Unexpected token ':'. Parse error.
Also tried XMLHttpRequest which results in same error:
var jsonArr = new XMLHttpRequest();
jsonArr.open('GET', 'datadata.json', true);
jsonArr.onreadystatechange = function(data) {
console.log(jsonArr.name);
};
jsonArr.send();
When the .json file data has a name for the array:
data = '[{"foo":6481,"value":13,"thing":"12_3"}]'
using JSON.parse(data) works.
Why is this and how can I get the data to parse from a URL?
Also, I do NOT want to use PHP for this.
---Working solution, but still with error for .json file---
var myArray = new Array ();
$.getJSON( "datadata.json", function( data ){
myArray = data;
console.log(myArray.value);
});
using this format:
{"foo":6481,"value":13,"thing":"12_3"}
I've been searching around, but I cannot find an answer, my guess is that my question is not defined very well, so i hope to get some guidance
I'm using turbogears2.2
I'm sending from the client view a JavaScript object through $.post(),
On the server I receive this object (as kw):
{'phones[1][surname]': u'sym', 'phones[2][name]': u'', 'phones[1][phone]': u'5498498', 'phones[0][phone]': u'0564', 'phones[1][name]': u'jhon', 'phones[0][surname]': u'cat', 'phones[2][phone]': u'', 'phones[0][name]': u'bob'}
I'm sending a data from a table with 3 columns
On my server I'm trying to separate the data for each row, but I'm a bit lost here.
how can I split that dict into different rows of data?
Doing
import json
json.loads(str(kw))
Fails
{ValueError}: Expecting property name: line 1 column 2 (char 1)
How can I convert that dict/object to a nested dictionary (or something else)?
Thanks
Thanks for the help Martijn Pieters , I thought I was posting JSON, but i wasn't.
You didn't post JSON; you posted application/x-www-form-urlencoded data that jQuery formatted for the PHP array feature. – Martijn Pieters
Here is my JavaScript, I'm trying out HandsOnTable (jQuery data grid editor)
$("#sendToServer").click(function(){
var tableData = $("#myTable").data('handsontable');
$.post(
URL,
{phones:tableData.getData()},
function(data){
console.log(data)
}
)
})
And that wasn't JSON, even though I thought it was
Anyway, simple fix:
Client side (JavaScript):
var tableData = $("#myTable").data('handsontable');
var jsonData = JSON.stringify(tableData.getData())
...
$.post(URL,
{phones:jsonData},
...
)
And now on the server side (Python):
import json
def getPhones(self,**kw):
phones = json.loads(kw['phones'])
...
And I have the data as a dict of rows, great
Thanks for the guidance
To post JSON, don't use $.post(). Use $.ajax() instead, and set the content type explicitly:
$.ajax({
url: URL,
type: "POST",
data: JSON.stringify({phone: tableData.getData()}),
contentType: 'application/json; charset=utf-8'
dataType: 'json',
success: function(data) {
console.log(response);
},
});
This can especially help if you have a controller that handles JSON directly, such as those provided by TurboGears Web Services.
I have a php returning some json in response to a POST request made via an ajax function.
In my php function I format the data like this:
//json return
$return["answers"] = json_encode($result);
echo json_encode($return);
This returns the following string:
answers: "[{"aa":"Purple","0":"Purple","ab":"Blue","1":"Blue","ac":"Red","2":"Red","ad":"Yellow","3":"Yellow"}]"
And this is where I am trying to catch it to use the data:
$.ajax({
type: "POST",
url: "http://ldsmatch.com/pieces/functions/question.functions.php",
dataType : 'JSON',
data: dataString,
success: function(data) {
alert(data.answers[0]["aa"]);
}
});
I've been trying to just alert the data so I can visualize it before setting up the vars I need, but am having some trouble formatting it correctly so it is usable.
If I alert data.answers[0] then it just shows me the first character in the string, which is a bracket [ and if i subsequently change the number it will go through each character in the returned string.
I have tried other variations, such as:
data.answers[0]["aa"] (this returns 'undefined' in the alert)
data.answers["aa"] (this returns 'undefined' in the alert)
data.answers[0] (this returns the first character of the string)
I feel like I'm close, but missing something. Any guidance appreciated.
edit:
thanks for all the suggestions. I removed the second json_encode and was able to parse with data.answers[0].aa
success: function(data) {
var json = $.parseJSON(data);
alert(json.answers[0]["aa"]);
}
Use parseJson like this
var json = $.parseJSON(data);
$(json).each(function(i,val){
$.each(val,function(k,v){
console.log(k+" : "+ v);
});
});
What if you remove double-encoding on PHP side? You've got an object with JSON string instead of object with first property being object itself, or you may explicitly decode "answers" property on client side as it was suggested above.
I try to implement the following code
var flag = new Array();
var name = $("#myselectedset").val();
$.ajax({
type: 'post',
cache: false,
url: 'moveto.php',
data: {'myselectset' : name,
'my_flag' : flag
},
success: function(msg){
$("#statusafter").ajaxComplete(function(){$(this).fadeIn("slow").html(msg)});
}
});
You can see that the name is a single string and the flag is an arry, am I using the right format for passing them throw ajax call, anyone could help me, thanks
It is impossible to pass arrays in a POST request. Only strings.
You will either need to stringify your array, or consider posting as JSON instead.
You should be able to do something quite simple, like replace your "data" property with:
data : JSON.stringify( { myselectset : name, my_flag : flag } )
That will convert the data into a JSON string that you can turn into PHP on the other side, using json_decode($_POST["my_flag"]);
Very important note:
For JSON.stringify to work, there can't be any functions in the array - not even functions that are object methods.
Also, because this is a quick example, make sure that you're testing for null data and all of the rest of the best-practices.