Syntax JSON.stringify([, [, ]]) Parameters value The value to convert to a JSON string. replacer Optional A function that alters the behavior of the stringification process, or an array of String and Number objects that serve as a whitelist for selecting the properties of the value object to be included in the JSON string. Space Optional. Using JSON Data with Google Charts. Truly live web applications are typically data driven.
For example, a Facebook wall is a collection of posts, photos, interests and personal data, a Google search result page is a collection of ten URL listings, etc. The data in these pages is independent of the page - it is loaded and usually updated after you request and interact with the page. In this week's lesson we learn how this technique is accomplished. AJAX is a general term, as well as the name of the JQuery function, that makes a spontaneous HTTP request of a server. The Exercise After going through the tutorial and getting the basic page working, there are many ways you can continue to explore AJAX, the data transformation routine of this program, or Google Charts - either exploring the additional options of the GeoChart type or using the States data to create different types of charts.
The Tutorial US Demographic Data by State (April 2013) Sorted by income Step by Step instructions var dimension = "population";
18.2. json — JSON encoder and decoder — Python 2.7.10 documentation. Extensible JSON encoder for Python data structures.
Supports the following objects and types by default: To extend this to recognize other objects, subclass and implement a default() method with another method that returns a serializable object for o if possible, otherwise it should call the superclass implementation (to raise TypeError). If skipkeys is False (the default), then it is a TypeError to attempt encoding of keys that are not str, int, long, float or None. If skipkeys is True, such items are simply skipped. If ensure_ascii is True (the default), all non-ASCII characters in the output are escaped with \uXXXX sequences, and the results are str instances consisting of ASCII characters only. If check_circular is True (the default), then lists, dicts, and custom encoded objects will be checked for circular references during encoding to prevent an infinite recursion (which would cause an OverflowError).
Note If specified, separators should be an (item_separator, key_separator) tuple. Using Django templates with jQuery AJAX. I recently discovered a neat way of displaying data retrieved using jQuery AJAX in concert with Django’s template engine.
You can create a view in Django which simply uses the render_to_response shortcut function to render the results server-side and then just use jquery.load to dynamically fetch the results. Eventhough, returning some raw JSON data is much more efficient as far as bandwidth is concerned, this method is a lot simpler. I have been using jQuery for over a year now. I have found that its built-in DOM manipulation features are a bit limited, especially for manipulating tables (e.g., adding rows dynamically).
This method is much cleaner than doing all that DOM manipulation. Here is all the jQuery code to handle the search and AJAX spinner display: Python - Rendering JSON objects using a Django template after an Ajax call. Untitled. Working with JSON and Django - GoDjango. In this day and age of web development we work with json, a lot, especially with using web services.
Unfortunately, sometimes you can forget what does what, when, and where when dealing with json. I know I have to look up the same thing over and over at times. Working with JSON and Django - GoDjango. Djangosnippets: Render specific blocks from templates (useful for AJAX, alternative) Python - Rendering JSON objects using a Django template after an Ajax call. Python - django serialize queryset.values() into json. What is the difference between JSON and Object Literal Notation? Django returning JSON for AJAX requests. Django/JQuery.ajax. Get values from JSON using ajax. How to implement two dropdowns dependent on each other using Django and jQueryDevInterface Blog.
Django: Get database object value in template using Ajax. Ajax() Description: Perform an asynchronous HTTP (Ajax) request.
The $.ajax() function underlies all Ajax requests sent by jQuery. It is often unnecessary to directly call this function, as several higher-level alternatives like $.get() and .load() are available and are easier to use. If less common options are required, though, $.ajax() can be used more flexibly. At its simplest, the $.ajax() function can be called with no arguments: Note: Default settings can be set globally by using the $.ajaxSetup() function. This example, using no options, loads the contents of the current page, but does nothing with the result. The jqXHR Object. How do I use AJAX along side Django ? Introduction Within this example we will show you a simple example of how to integrate AJAX with Django.