Django, API, REST, 1 - Serialization. Tutorial 1: Serialization Introduction. This tutorial will cover creating a simple pastebin code highlighting Web API. Along the way it will introduce the various components that make.It only needs a modern browser (tested in Chrome and Firefox). Optional Requirements. The following are not required, but can improve the style and usability of JSON Editor when present. A compatible JS template engine (Mustache, Underscore, Hogan, Handlebars, Swig, Markup, or EJS) A compatible CSS framework for styling (bootstrap 2/3, foundation 3/4/5, or jqueryui) A compatible icon library (bootstrap 2/3 glyphicons, foundation icons 2/3, jqueryui, or font awesome 3/4)SCEditor for WYSIWYG editing of HTML or BBCode content. Epic. Editor for editing of Markdown content. Ace Editor for editing code. In this test, each request is processed by fetching multiple rows from a simple database table and serializing these rows as a JSON response. The test is run multiple times: testing 1, 5, 10, 15, and 20. A curated list of awesome Python frameworks, libraries and software. Appcelerator Platform - Appcelerator Docs. Appcelerator Platform. Tempo takes information encoded as JSON and renders it according to an HTML template. Below is a sample array of JSON data. Building a RESTful API with Django-rest-framework By : Rakesh Vidya Chandra. API's turned to be the heart of every application in our time. With the rise of social media, API's are being developed at a faster pace and gaining. For many people, testing their Django applications is a mystery. They hear that they should be testing their code but often have no clue how to get started. And when they hit the testing docs, they find a deep dive on what. Select. 2 for nicer Select boxes. Selectize for nicer Select & Array boxesmath. Of, divisible. By, etc.)Usage. If you learn best by example, check these out: The rest of this README contains detailed documentation about every aspect of JSON Editor. See the Templates and Variables section below for more info. The CSS theme to use. Just like the CSS theme, you can set the icon lib globally or when initializing: // Set the global default. JSONEditor. defaults. You can use it by setting the format to any of the following: actionscript batchfile c c++ cpp (alias for c++) coffee csharp css dart django ejs erlang golang groovy handlebars haskell haxe html ini jade java javascript json less lisp lua makefile markdown matlab mysql objectivec pascal perl pgsql php python r ruby sass scala scss smarty sql stylus svg twig vbscript xml yaml. It has tabs on the left for switching between items. Here's an example of the table format. Works with schema using enum values. Should be a valid CSS width string (e. Should be a valid CSS width string (e. For example: // Add a resolver function to the beginning of the resolver list// This will make it run before any other ones. JSONEditor. defaults. Sammy. js / A Small Web Framework with Class / RESTFul Evented Java. Script. The JSON Store: A Sammy. Tutorial, Part IAs promised I’m starting a series of tutorials for getting to know Sammy. Instead of starting huge I’m going to start pretty small and slowly build up. However, instead of starting at Hello World (which the documentation pretty well covers), lets jump into a somewhat more realistic use case. Lets party like its 1. E- commerce front end! Its just like E- mail, but with more $$$.) We’ll call our shop The JSON Store (just to confuse people). The goal of this little walkthrough is to build a very basic e- commerce front end. It wont do everything yet. We’ll get to everything later. What it will do: load a selection of items from JSONDisplay the items in a grid, with images. Allow you to click on the product to view more details about them. OK. Its going to be a pretty basic run through, but hey! You can follow along with the commits and see the app get built bit by bit. First things first, lets build a simple directory layout. Right now we’re not going to be talking to any services or a backend, just flat files. Heres the structure I created. We also need j. Query. Those are all the dependencies. Lets also create an empty JS file to store our app code. We could just include the code inside of script tags in our HTML, but I find its cleaner and easier to manage as an external file. First j. Query, then sammy. One last thing to note before we start coding – since we’re not using any sort of backend, I’ve created a simple JSON file that contains the info about the items in our store. For now, we’re selling CD’s and an item looks like. In our app file (javascripts/json. This should be the page thats loaded if a user first comes to our lovely store. Since we have a good idea at this point that the we’re at least going to maintain a header throughout the site and only the content area will change, lets add the header to our html. Youdo this by setting the app’s element. Plan of attack: create a route to handle the indexajax fetch the item datarender each item using client- side templating. First step: create a route. When the browser hits . Lets just add a simple call to log to make sure our route is firing. So lets crack open our browser to index. Oy, It doesn’t. Even if we change the URL to . Quit banging your head. Theres a very good reason. Our Sammy app isn’t running! Sammy doesn’t run until you tell it to, and usually you want to tell it to run after the DOM has loaded. Lets add a call to run within a j. Query. ready callback. We’ll also pass it a . Our code should look like this. Open up our browser and it should go directly to ! Lets proceed to making our route actually useful. As we said, the first thing we want to do is load our item data via AJAX. We’ll get the data using $. In this callback well be iterating over the items. And for now, lets just log their names. Now that we have our data, we want to actual render it so that our thousands of potential shoppers can see it. Note about using Google Chrome (or Chromium) and AJAXIf you’re using a recent version of chrome and have followed the instructions up until this point, you might be scratching your head wondering why nothing seems to work, or at least the items dont seem to be fetched from the JSON. Since version 5, Chrome has blocked AJAX resquests to any protocol other than http: //. Of course, this includes file: //, so if you’re just running this code on your local machine the AJAX requests will seem to work, but just wont. There’s an easy solution, however, just run a local web server. If you’re coding in a Django, Sinatra, or Rails app, this shouldn’t be a problem. If you just want to serve files from a directory, there are a couple options. If you’re on OS X, you have Apache built in. Start Web Sharing in your Sharing Preferences and put you’re files under the Apache www directory. To make it even easier, I’ve included a simple ruby script called . The Render. Context tries to abstract away the problems of complex asynchronous templating, by creating a simple way to chain commands. The chaining looks a lot like j. Query’s own syntax, but Render. Context actually is doing a lot behind the scenes to make sure that each command happens in order whether its asynchronous or not. This means that you can fetch the data, interpolate it, and render it to the screen without ever making a callback. Sounds pretty nifty, eh? Lets start by changing the $. In our case we can just make this a call to then(). It tells the Render. Context to execute the callback as soon as the previous operation is done, passing the results as an argument. For example, we could chain as many then()s as we want, returning something different each time. To learn more about Render. Context, check out the API Documentation. By changing our original AJAX call to load() we’ve also gained parsing of the JSON, simply by using the . That tells Sammy to use the JSON . To do this we have to pick a templating engine and install the Sammy plugin for it. There are a lot of great options for client side templating these days – Mustache, EJS, HAML, Pure, Meld – I suggest when writing an app, you check them all out and evaluate which of them fits your needs. For the purposes of this tutorial, we’re going to pick an old and trusted friend: Sammy. Template. The Sammy. Template plugin provides us with a simple method based on John Resig’s templating code and Greg Borenstein’s $. HTML with embedded javascript and variables. In order to use Sammy. Template we need to include the plugin in our HTML and then ! Lets create a simple template for an item. In templates/item. Now that we have our template, lets render it. The method for rendering remote templates in Sammy is render. Instead of just logging, lets render the items with our new template. By using the extension . Next, we’re passing local variables to the template. Here its our our item. Because we’re not swapping out the entire content area, we use . To() to append the rendered content to our app’s $element. With our new partial we should see our items displaying! Clicking on an item to view its detail. We know how to start though right? Lets define a route for an item detail. This allows us to pull the id for the item into the params object. For the sake of simplicity, were going to say that an item id is its index in the items array. This means that before we can load the details, we need to load the items data again. Instead of a dreaded copy and paste, lets use the opportunity to refactor a bit. Since we know were going to need to load the items before each route, we could use the before() method to run something before each route runs. However, this won’t work because we’re not just doing anything before, we’re making an asynchronous request to the server/filesystem and then when its complete, we want to move on to the route. For this set of problems, we have around(). In our case, this would look something like. The first argument to the around callback is the next callback in the chain, or in this case the route. Once we’ve assigned the items, we can queue the callback, making sure that the items are always loaded before we run our route code. Now that we have the item data loaded in our context, lets pull out the item we want and render a detail view. For demonstration sake, here I’m using this instead of context to show that in a route callback, they’re equivalent. Its important to mention though, if your nesting callbacks, this will most likely change, which is why using the context from the arguments is rather helpful. We pull item item out of the array, assign it to item and then render a new item. This time, instead of using render(), we use partial() which internally calls render and then swaps our the content of the entire app element. The template code looks roughly the same as the index item template, except we’re going to use the large image and add a link to Amazon and a link back to the index. Thats not entirely true actually, if we type . Our back and forward buttons should work great, too! One last bug to fix: When we go back to the index after loading a detail, the detail is still there! This is because of how we’re loading the item partials, instead of using the app’s swap() method, we’ve been appending each partial to the content area. The fix is a single line. We just need to clear the content area before loading the partials. Next time we’ll learn how to use post() routes to handle form submissions and more! Go on to Part II Now.
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December 2016
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