How to serialize a form properly with input name array - javascript

I have a form with inputs that look like this:
<form id="myForm">
<input type="text" name="location[0]">
<input type="text" name="location[1]">
<input type="text" name="user[0]">
<input type="text" name="user[1]">
...
</form>
I am making an ajax call with the form data as the post body. When I try to serialize the form ($("#myForm").serializeArray), I do not get arrays within an array. I still get all fields as their own separate objects like so:
[
{
name: "location[0]",
value: "123"
},
{
name: "location[1]",
value: "456"
}
...
]
How do I serialize the form so that I have a multidimensional array as the data to send to my backend (in Scala)? I want it to look like:
[
{ name: "location",
value: [123, 456]
},
{ name: "user",
value: ["Jim", "Jane"]
}
]

Fiddle https://jsfiddle.net/w8bu4s10/
I don't know a basic function but you can use this function:
function getArray(element){
var result = new Array();
$(element).find('input').each(function(i,e){
// extract path from name
var path = $(e).attr('name').split('[');
for(var key in path){
if(path[key].endsWith(']')){
path[key] = path[key].substr(0, path[key].length-1);
}
}
// create path inside result array
var node = result;
for(var depth in path){
if(depth == path.length-1){
if(Number.isInteger(path[depth])){
node.splice(path[depth], 0, $(e).val());
}else{
node.push($(e).val());
}
}else{
var found = false;
for(var key in node){
if(node[key].name == path[depth]){
found = true;
node = node[key].value;
break;
}
}
if(!found){
var obj = new Object();
obj['name'] = path[depth];
obj['value'] = new Array();
node.push(obj);
node = node[node.length - 1].value;
}
}
}
});
return JSON.stringify(result);
}

I figured out how to do it. Name all inputs with array brackets at the end, but do not specify an index in []. Even though it doesn't look like a proper array value when printing the result of form.serializeArray(), the backend will properly interpret it. In my case, Scala Play consolidated all values with the same key into an ArrayBuffer.

Related

How to send HTML form values to localstorage in JSON string using JavaScript

what is the easiest way to retrieve form values to send to localStorage as a JSON string? I started a function with a for loop but am stuck..any nudges are greatly appreciated(still very new to this) No JQuery please. Thank you
<input type="submit" name="submit" value="submitOrder" onclick="return getValues();">
var userOrder='';
function getValues(){
for(var i=0; i < document.forms[0].length - 1; i++){
console.log(document.forms[0][i]);
return false;
}
}
localStorage.setItem('userOrder',JSON.stringify(userOrder));
console.log(localStorage.getItem('userOrder'));
You could do it like this:
html:
<form id="myform">
<input type="text" name="test">
<input type="submit" value="submitOrder">
</form>
js:
const userOrder = {};
function getValues(e) {
// turn form elements object into an array
const elements = Array.prototype.slice.call(e.target.elements);
// go over the array storing input name & value pairs
elements.forEach((el) => {
if (el.type !== "submit") {
userOrder[el.name] = el.value;
}
});
// finally save to localStorage
localStorage.setItem('userOrder', JSON.stringify(userOrder));
}
document.getElementById("myform").addEventListener("submit", getValues);
No need for jQuery. This uses ES 2015 syntax but if you need to support old browsers just run it through babel.
// Iterate over all the forms in the document as an array,
// the [...stuff] turns the nodelist into a real array
let userdata = [...document.forms].map(form => {
// iterate over all the relevant elements in the form and
// create key/value pairs for the name/object
return [...form.elements].reduce((obj, el) => {
// Every form control should have a name attribute
obj[el.name] = el.value;
return obj;
}, {});
});
// convert the data object to a JSON string and store it
localStorage.setItem('userOrder', JSON.stringify(userdata));
// pull it pack out and parse it back into an object
let data = JSON.parse(localStorage.getItem('userOrder'));
If the forms all have ids (and they should) you could also use reduce in the outer layer instead of map and hash on the form id:
let userdata = [...document.forms].reduce((result, frm) => {
result[frm.id] = [...frm.elements].reduce((obj, el) => {
and so on.

Twitter Typeahead 0.9.3 returning json object

I'm attempting to return a json object in my typeahead rather than just a single query. The idea is to pass along additional fields in my autocomplete menus to help filter down the results. Example year, make, model, trim. the json object would contain the filteredBy field id and field value. Example when searching make, the json object will contain the filter field id "year" and value"2013" plus the current field id and it's value.
Currently this works below, but only returns a single value.
return $field.typeahead({
replace: (uri, query) {
return extendURL(uri, "t:input": query);
}
}
This is how I'm trying to do it.
<input id="year" value="2013"/>
<input id="make" filterBy="year" value="ford"/>
<input id="model" filterBy="ford" value="fusion"/>
init = function(spec) {
var $field = $("#" + spec.id),
filterIdArray = [];
if (typeof spec.filterId !== 'undefined') {
filterIdArray = spec.filterId.split(',');
}
return $field.typeahead({
replace: function(uri, query) {
var params = {};
params["t:jsonStringField"] = searchField(spec.id, query);
params["t:jsonStringFilter"] = searchFilter(filterIdArray);
var stringify = JSON.stringify(params);
//I'm trying to pass back this stringified json object.
return extendURL(uri, stringify);
}
}
//The current search input
searchField = function(fieldId, query) {
return {name: fieldId, value: query};
};
//Additional fields used to create where clause within searchField
searchFilter = function(filterIdArray) {
var array = [];
//Field Id's and any fields being filtered by
for (var i = 0; i < filterIdArray.length; i++) {
var value = $("#" + filterIdArray[i]).val(),
name = filterIdArray[i];
array.push({name: name, value: value});
};
return array;
};
I end up getting the following error.
"NetworkError: 500 Internal Server Error - /TapDemo/sell/createlisting.year:autocomplete?category=aircraft&0={&1=%22&2=t&3=:&4=j&5=s&6=o&7=n&8=S&9=t&10=r&11=i&12=n&13=g&14=F&15=i&16=e&17=l&18=d&19=%22&20=:&21={&22=%22&23=n&24=a&25=m&26=e&27=%22&28=:&29=%22&30=y&31=e&32=a&33=r&34=%22&35=,&36=%22&37=v&38=a&39=l&40=u&41=e&42=%22&43=:&44=%22&45=5&46=%22&47=}&48=,&49=%22&50=j&51=s&52=o&53=n&54=S&55=t&56=r&57=i&58=n&59=g&60=F&61=i&62=l&63=t&64=e&65=r&66=%22&67=:&68=[&69=]&70=}"
Does anybody know what I'm doing wrong?
What you need to do is, send these values as json encode and make sure you decode the data as an array, in that way you be able to handle these values.

How can i send objects as parameter Javascript

I need to pass an array as parameter but i have a problem, i dont know how to explain it so here is the example:
I have this code:
var doc = document;
var Class = {};
Class.Validate = function(opc)
{
alert(opc.id);//
return Class;// when returns the object the alert trigger as expected showing "#name"
};
Class.Validate({
id: "#name",
})
But what im trying to do is this:
var Class = {};
Class.Validate = function(opc)
{
alert(opc.name);//when the object is return show display "carlosmaria"
return Class;//
};
Class.Validar({
name: {field:"carlos",field:"maria"},
})
how can i archived that?
alert(opc.name) should return something like {Object object} because it's an objet. The second point is that your object has twice "field" as property.
If you want to use an array, you should call this way:
Class.Validar({
name: ["carlos", "maria"]
})
Then, you could loop over opc.name to concatenate a full name. Something like this:
Class.Validate = function(opc)
{
var name = "";
for (var i=0, len=opc.name.length; i<len; ++i) {
name += opc.name[i];
}
alert(name);//when the object is return show display "carlosmaria"
return Class;//
};
Consider using actual arrays (via array literals):
Class.Validate({
name: ["carlos", "maria"]
});

How to build a json object with a loop?

I'm trying to loop through a number of items, and create a json object. Each loop should be a new item on the object, but I'm having some issues doing it. It seems that only one set of items gets added, instead of multiple ones.
Here is my code:
jsonObj = {}
rows.each(function (index) {
jsonObj["id"] = $this.find('.elementOne').val();
jsonObj["name"] = $this.find('.elementTwo').text();
});
Here is what my json looks like:
{
id: "3"
name: "Stuff"
},
Here is what I am trying to do:
{
id: "1"
name: "Stuff"
},
{
id: "2"
name: "Stuff"
},
{
id: "3"
name: "Stuff"
}
There is no JSON here. Please don't confuse:
A JavaScript object (a data structure)
A JavaScript object literal (code to create such a data structure)
JSON (a data format based on a subset of object literal notation)
If you want an ordered list of objects (or any other kind of JavaScript data structure) then use an array. Arrays have a push method.
var myData = [];
rows.each(function (index) {
var obj = {
id: $this.find('.elementOne').val(),
name: $this.find('.elementTwo').text()
};
myData.push(obj);
});
You override the object instead of adding it a new value each iteration.
Fixed code using an array:
jsonObj = [];
rows.each(function(index) {
jsonObj.push({
'id': $this.find('.elementOne').val(),
'name': $this.find('.elementTwo').text()
});
});​
What you want is an array of objects. When you try to write the same property on the same object multiple times, it gets overwritten which is why you're seeing id and name contain values for the last iteration of the loop.
Although you haven't tagged the question with jQuery, it does look like jQuery, so here's a solution:
I've taken the liberty to change $this to this because $this seems to be referring to the same object in each iteration, which is now what you may want (methinks)
var myArray = rows.map(function() {
return {
id: $(this).find('.elementOne').val(),
name: $(this).find('.elementTwo').text()
};
});
You can do it like this with jquery. The function will expect form elements of type input. It will iterate over thr passed form and it will collect each input name and value and it will create a json object like
Exmple:
HTML
<form action="" method="post" id="myForm">
<input type="text" name="field1" value="I am value of field 1"/>
<input type="text" name="field2" value="I am value of field 2"/>
</form>
Javascript
function buildObject(form) {
var jsonObject = [],
tempObj = {};
$(form).find("input:not(input[type='submit'])").each(function() {
tempObj[$(this).attr("name")] = $(this).val();
});
jsonObject.push(tempObj);
return jsonObject[0];
}
buildObject($("#myForm"));
//Will produce
jsonObj = {
field1 : "I am value of field 1",
field2 : "I am value of field 2"
}
This is because you're merely overwriting the same properties of your object, id and name, each time. You need to be making a sub-object for each, then push it into the master object (which I've converted to array, since it's non-associative).
var jsonObj = []
rows.each(function (index) {
var temp_obj = {};
temp_obj["id"] = $this.find('.elementOne').val();
temp_obj["name"] = $this.find('.elementTwo').text();
jsonObj.push(temp_obj);
});
[EDIT] - as Mark Eirich's answer shows, the temp_obj is unnecessary - you could push an anonymous object instead, but I defined temp_obj just to make it crystal clear what's happening.
Also read Quentin's very good points re: common confusion between JavaScript objects and JSON.
var jsonObj = [];
rows.each(function(index) {
jsonObj.push({
id: $this.find('.elementOne').val(),
name: $this.find('.elementTwo').text()
});
});

How to convert jQuery.serialize() data to JSON object?

Is there any better solution to convert a form data that is already serialized by jQuery function serialize(), when the form contains multiple input Array fields. I want to be able to convert the form data in to a JSON object to recreate some other informative tables. So tell me a better way to get the serialize string converted as a JSON object.
<form id='sampleform'>
<input name='MyName' type='text' /> // Raf
<!--array input fields below-->
<input name='friendname[]' type='text' /> // Bily
<input name='fiendemail[]' type='text' /> // bily#someemail.com
<!--duplicated fields below to add more friends -->
<input name='friendname[]' type='text' /> // Andy
<input name='fiendemail[]' type='text' /> // Andy#somwhere.com
<input name='friendname[]' type='text' /> // Adam
<input name='fiendemail[]' type='text' /> // Adam#herenthere.com
</form>
The jquery method applied to get the data
var MyForm = $("#sampleform").serialize();
/** result : MyName=Raf&friendname[]=Billy&fiendemail[]=bily#someemail.com&friendname[]=Andy&fiendemail[]=Andy#somwhere.com&friendname[]=Adam&fiendemail[]=Adam#herenthere.com
*/
how do I make this data in to a JSON object?
which should have the following example JSON data from the above form.
{
"MyName":"raf",
"friendname":[
{"0":"Bily"},
{"1":"Andy"},
{"2":"Adam"}
],
"friendemail":[
{"0":"bily#someemail.com"},
{"1":"Andy#somwhere.com"},
{"2":"Adam#herenthere.com"}
]
}
var formdata = $("#myform").serializeArray();
var data = {};
$(formdata ).each(function(index, obj){
data[obj.name] = obj.value;
});
Simple and fast ;)
I have recently had this exact problem. Initially, we were using jQuery's serializeArray() method, but that does not include form elements that are disabled. We will often disable form elements that are "sync'd" to other sources on the page, but we still need to include the data in our serialized object. So serializeArray() is out. We used the :input selector to get all input elements (both enabled and disabled) in a given container, and then $.map() to create our object.
var inputs = $("#container :input");
var obj = $.map(inputs, function(n, i)
{
var o = {};
o[n.name] = $(n).val();
return o;
});
console.log(obj);
Note that for this to work, each of your inputs will need a name attribute, which will be the name of the property of the resulting object.
That is actually slightly modified from what we used. We needed to create an object that was structured as a .NET IDictionary, so we used this: (I provide it here in case it's useful)
var obj = $.map(inputs, function(n, i)
{
return { Key: n.name, Value: $(n).val() };
});
console.log(obj);
I like both of these solutions, because they are simple uses of the $.map() function, and you have complete control over your selector (so, which elements you end up including in your resulting object). Also, no extra plugin required. Plain old jQuery.
Use the jQuery.serializeJSON plugin.
It converts forms using the same format as what you would find in a Rails params object, which is very standard and well tested.
I'm using this very little jQuery plugin, that I've extended from DocumentCloud:
https://github.com/documentcloud/documentcloud/blob/master/public/javascripts/lib/jquery_extensions.js
It is basically two lines of code, but it requires _.js (Underscore.js), since it is based on a reduce function.
$.fn.extend({
serializeJSON: function(exclude) {
exclude || (exclude = []);
return _.reduce(this.serializeArray(), function(hash, pair) {
pair.value && !(pair.name in exclude) && (hash[pair.name] = pair.value);
return hash;
}, {});
}
});
Extensions:
It doesn't serialize an input value if it's null
It can exclude some inputs by passing an array of input names to the exclude argument i.e. ["password_confirm"]
I think there're a lot of good answer here, and I made my own function based on these answers.
function formToJSON(f) {
var fd = $(f).serializeArray();
var d = {};
$(fd).each(function() {
if (d[this.name] !== undefined){
if (!Array.isArray(d[this.name])) {
d[this.name] = [d[this.name]];
}
d[this.name].push(this.value);
}else{
d[this.name] = this.value;
}
});
return d;
}
//The way to use it :
$('#myForm').submit(function(){
var datas = formToJSON(this);
return false;
});
Well let me explain basically why I prefer this solution...
If you have multiples input with the same name, all values will be stored in an Array but if not, the value will be stored directly as the value of the index in the JSON ... This is where it's different from Danilo Colasso's answer where the JSON returned is only based of array values...
So if you have a Form with a textarea named content and multiples authors, this function will return to you :
{
content : 'This is The Content',
authors :
[
0: 'me',
1: 'you',
2: 'him',
]
}
An equivalent solution to Danilo Colasso's, with the sames pros and cons of .serializeArray() (basically it uses .reduce instead of $.each).
With little effort it allows implementing the extra features in S.C.'s answers without requiring extensions.
$(selector).serializeArray()
.reduce(function(accum, item) {
// This 'if' allows ignoring some values
if (-1 === [ 'ignoreThis', 'andThat' ].indexOf(item.name)) {
// This allows ignoring NULL values
if (item.value !== null) {
accum[item.name] = item.value;
}
}
return accum;
},
{
// By supplying some initial values, we can add defaults
// for, say, disabled form controls.
preFilledName: preFilledValue, // optional
defaultName : defaultValue // optional
}
);
if you can use ES6, you could do
const obj = arr.reduce((acc, {name, value}) => ({...acc, [name]: value}), {})
for a serialized array works very well.
var formdata = $("#myform").serializeArray();
var data = {};
$(formdata ).each(function(index, obj){
if(data[obj.name] === undefined)
data[obj.name] = [];
data[obj.name].push(obj.value);
});
Using underscore & jQuery
var formdata = $("#myform").serializeArray();
var data = {};
_.each(formdata, function(element){
// Return all of the values of the object's properties.
var value = _.values(element);
// name : value
data[value[0]] = value[1];
});
console.log(data); //Example => {name:"alex",lastname:"amador"}
Using the power of reducing function!
$(form).serializeArray().reduce(function (output, value) {
output[value.name] = value.value
return output
}, {})
With all Given Answer there some problem which is...
If input name as array like name[key], but it will generate like this
name:{
key : value
}
For Example :
If i have form like this.
<form>
<input name="name" value="value" >
<input name="name1[key1]" value="value1" >
<input name="name2[key2]" value="value2" >
<input name="name3[key3]" value="value3" >
</form>
Then It will Generate Object like this with all given Answer.
Object {
name : 'value',
name1[key1] : 'value1',
name2[key2] : 'value2',
name3[key3] : 'value3',
}
But it have to Generate like below,anyone want to get like this as below.
Object {
name : 'value',
name1 : {
key1 : 'value1'
},
name2 : {
key2 : 'value2'
},
name3 : {
key2 : 'value2'
}
}
Then Try this below js code.
(function($) {
$.fn.getForm2obj = function() {
var _ = {};
$.map(this.serializeArray(), function(n) {
const keys = n.name.match(/[a-zA-Z0-9_]+|(?=\[\])/g);
if (keys.length > 1) {
let tmp = _;
pop = keys.pop();
for (let i = 0; i < keys.length, j = keys[i]; i++) {
tmp[j] = (!tmp[j] ? (pop == '') ? [] : {} : tmp[j]), tmp = tmp[j];
}
if (pop == '') tmp = (!Array.isArray(tmp) ? [] : tmp), tmp.push(n.value);
else tmp[pop] = n.value;
} else _[keys.pop()] = n.value;
});
return _;
}
console.log($('form').getForm2obj());
$('form input').change(function() {
console.clear();
console.log($('form').getForm2obj());
});
})(jQuery);
console.log($('form').getForm2obj());
<script src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
<form>
<input name="name" value="value">
<input name="name1[key1]" value="value1">
<input name="name2[key2]" value="value2">
<input name="name3[key3]" value="value3">
<input type="checkbox" name="name4[]" value="1" checked="checked">
<input type="checkbox" name="name4[]" value="2">
<input type="checkbox" name="name4[]" value="3">
</form>
if you are using ajax requests then no need to make it json-object only $('#sampleform').serialize() works excellently or if you have another purpose here is my solution:
var formserializeArray = $("#sampleform").serializeArray();
var jsonObj = {};
jQuery.map(formserializeArray , function (n, i) {
jsonObj[n.name] = n.value;
});
Use JSON.stringify() and serializeArray():
console.log(JSON.stringify($('#sampleform').serializeArray()));

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