How to serialize a form into an object (with tree structure)?
I have a form
<form>
<input type="text" name="Name" />
<input type="checkbox" name="开发者_JAVA技巧Feature.Translate" />
<input type="checkbox" name="Feature.Share" />
<input type="submit" value="Convert into an object" />
</form>
I want to convert it in an object
{
Name: "John Connor's Terminator",
Feature:
{
Translate: true // if checked
// Share wasn't checked
}
}
How can I map the form to an object that has this tree structure?
Add this method to help you build the tree
// add keys to an object as a tree
// ["a", "b", "c"] will generate
// a { b: { c: def } }
// def is the value of the leaf node
var AddToTree = function(obj, keys, def)
{
for (var i = 0, length = keys.length; i < length; ++i)
obj = obj[keys[i]] = i == length - 1 ? def : obj[keys[i]] || {};
};
Create a function for a jQuery selector that will convert the form in an object
$.fn.serializeObject = function()
{
var o = {}; // final object
var a = this.serializeArray(); // retrieves an array of all form values as
// objects { name: "", value: "" }
$.each(a, function() {
var ns = this.name.split("."); // split name to get namespace
AddToTree(o, ns, this.value); // creates a tree structure
// with values in the namespace
});
return o;
};
With these two functions define you can set an event on the submit button:
$(":submit").click(function(e){
// contains the object from the form
// respecting element namespaces
var obj = $("form").serializeObject();
});
Something like the following should work:
function serializeData() {
//this is where we'll store our serialized data
var serializedData = {};
//iterate over input, select, and textarea elements
jQuery("input, select, textarea").each(function(index) {
var $element = jQuery(this);
var name = $element.attr("name");
//we only want to serialize the element if it has a 'name' attribute
if(typeof name != "undefined") {
//split on the . to get an array
var parts = name.split(/\./);
//start building the serialized data
var currentPart = serializedData;
for(var i = 0; i < parts.length; i++) {
//if this particular element doesn't already exist in our hash, create it
//and initialize it to an empty hash
if(typeof serializedData[parts[i]] == "undefined") {
currentPart[parts[i]] = {};
}
//if we're currently looking at the very last element in the array then
//it means that we need to set its value to the value of the corresponding
//input element. Otherwise, it means that there are still keys within the
//array and so we set `currentPart` to the new hash that we just created
if(i == parts.length - 1) {
//if the element is a checkbox or a radio, we need to see if it's checked
//instead of looking at its value
if($element.attr("type").toLowerCase() == "checkbox" || $element.attr("type").toLowerCase() == "radio") {
currentPart[parts[i]] = $element.is(":checked");
}
else {
currentPart[parts[i]] = $element.val();
}
}
else {
currentPart = currentPart[parts[i]];
}
}
}
});
console.log(serializedData);
}
Check out the fiddle.
All you need to do now is to bind serializeData
to the submit
event on the form.
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