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DJR

DJR (Direct jQuery Remoting) will generate the JavaScript code from Rails Controllers to allow browsers to securely call into Ruby code almost as if it was running locally

Getting started

Add it to your Gemfile with:

gem 'djr'

Run the bundle command to install it.

Configure assets in app/assets/application.js file:

//= require jquery
//= require djr
//= require_tree .

Import script in your pages:

<script type="text/javascript" charset="utf-8" src="/djr"></script>

In javascript, call your Controller like:

productsController = new ProductsController

productsController.save({
	name: "IPhone 4s",
	value: "500.00"
}, callbackFunction);

//or more complete

productsController.index({
	query: "IPhone"
}, function(productsListAsJson){
	showProductsFunction(productsListAsJson);
}, function(error) {
	errorHandler(error);
});

Your controller should be something like that:

class ProductsController < ApplicationController
    
    respond_to :html, :json
    
    def index
		@query = params[:query]
        @products = Product.search do
			fulltext @query
		end
        respond_with @products
    end
    
end

Conventions

controller.action( dataAsJson, callbackFunction, errorHandler );

License

MIT License. Copyright (c) 2012 Milfont Consulting. http://milfont.org