Controllers, just like models and viewers, need to be tested with Ruby communities favorite tool, RSpec. You can see a test illustrating this. You can watch this tutorial as a screencast Using Ajax and jQuery in Rails 5 Apps. 0(第4版)で実装したサンプルアプリケーションを元に、いいね(like)機能を拡張します。. Create a new Rails 5 app without spring. NOTE: This article is written for Rails 4. Only GitLab enables Concurrent DevOps to make the software lifecycle 200% faster. Unix timestamp (or epoch time or Unix time or POSIX time) is the number of seconds that have elapsed since January 1, 1970 00:00 UTC. The form is submitted to the server, which then sends back a response. Python is an object oriented programming language. Ruby lets us remove the extra parens and braces, leaving the stripped-down function call above. When you use these APIs you can get access to data like weather information, sports scores, movie listings, tweets, search engine results, and pictures. Potential benefits of bed rails include: Aiding in turning and repositioning within the bed. 1 /w Postgres. analyzer (Optional, string) Analyzer used to convert the text in the query value into tokens. This is very handy for debugging but sometimes it’s not desirable to have certain parameters, such as passwords, stored as plain text in the log. Ruby on Rails 6. Strong Parameters. 個別データの表示 show. Right-click the user-defined stored procedure that you want and click Execute Stored Procedure. 編集ページの表示 edit. It gives you certain parameters to work within, but you have a lot of flexibility about how the final product turns out. This article shows how to add a new version of Rails while keeping an old version. 2でログイン機能を実装する。 アンドロイド・アミーゴ・Rails Ruby on Railsログイン機能 KENJIRO LIFE: Ruby on Rails の flash 変数[環境] Windows8 Ruby 1. In many web apps, it's normal to connect to various third-party services by using APIs. escape(str) Parameters str A string to be encoded. Routes are set up in config/routes. 1 Summary of GLOBALS Parameters. req = Rack:: Request. And last but not least, any kind of discussion regarding Ruby on Rails documentation is very welcome on the rubyonrails-docs mailing list. We looked at our database of thousands of projects and found the top 10 Ruby on Rails errors. It is a security enhancement by removing the predictability of record discovery via the URL. When naming inputs, Rails uses certain conventions that make it possible to submit parameters with non-scalar values such as arrays or hashes, which will also be accessible in params. rake db :drop. See the code in action! Using image for submitting the form. Building a blog with comments using Ruby on Rails is a foundational exercise I went through to learn more about the framework. As in this case, we need to send only one data (keyword) to the server so the parameters variable contains only one property (to send more data, we can write more properties separated by comma). The first, config. Expand the Elasticsearch section and uncheck Elasticsearch indexing and Search with Elasticsearch enabled. Implement this method as follows. Delete record is another common functionality in grid listing. Rails has various url-processing functions which you can use here, so there's probably a few different ways of doing this. To send the data to the server, first we need to prepare an object. delete (:password) params. To learn about various bug fixes and changes, please refer to the change logs or check out the list of commits in the main Rails repository on GitHub. Let us Dive into Rails. I'm sure it comes as no surprise that this experience is made up of a series of requests and responses. Upgrading to Rails 5. Following these conventions for both HTTP method names and URL construction will allow your application to be consumed by ActiveResource, Jester, and other RESTful clients. June 29, 2007 at 9:36 am 12 comments. has_attached_file is the main method for adding a file attachment. As such, strong_params make even greater sense, as each controller defines the limitations for what it can change on the model. Ruby on Railsのコントローラに対するRSpecの書き方の紹介です。このドキュメントはRails 5. reCAPTCHA uses an advanced risk analysis engine and adaptive challenges to keep automated software from engaging in. The Picatinny rail (/ ˈ p ɪ k ə t ɪ n i / or / ˌ p ɪ k ə ˈ t ɪ n i /), or Pic rail for short, also known as a MIL-STD-1913 rail or STANAG 2324 rail, is a military standard rail interface system that provides a mounting platform for firearm accessories. Ruby on Rails tutorial 5. Built on Akka, Play provides predictable and minimal resource consumption (CPU, memory, threads) for highly-scalable applications. However, when we submit the form with existing tasks, the params[:project] hash will include a key called existing_task_attributes. Find all variables used in this code fragment. In the future, I will write about these frameworks and how to use them with Rails. This is the first part of my series - covering file uploading gems available for Rails developers. Great for both novice and experienced web developers. The values that can be assigned to the locale environment variables are names of locales generated on the system. It gives you certain parameters to work within, but you have a lot of flexibility about how the final product turns out. In this part of the tutorial, we'll implement token-based authentication with JWT (JSON Web Tokens). Updating to Rails 5. inc","content":" Follow Us On Facebook. Create a new Rails 5 app without spring. In this episode I show how to do exactly that. This works well when HTTP_REFERER is present and it redirects to previous page. If you are still getting billed, please email me at [email protected] UNCLASSIFIED TIPS * share the current directory tree (via http) at http://$HOSTNAME:8000/ >> python -m SimpleHTTPServer * Copy ssh keys to [email protected] to enable. Hibernate features a flexible and powerful version of this via declarative cascading persistence. These crud-operations can be directly mapped to the database, for example mongodb, if you are using the MEAN-stack. new (tags: [" rails ", " parameters "]) params. の機能を持つコントローラを考えます。 Viewは以下があるという認識で。 1. Note: You can watch your Rails console when creating a new post, you’ll be able to see the response to the create controller which contains a parameter called category_id with information. Returns true if a record exists in the table that matches the id or conditions given, or false otherwise. I am making an appointment app that holds a date range in one model (Project) and holds the available dates in another model (ProjectDate). It is designed to resemble the MVC architecture from frameworks like Ruby on Rails, but with support for the more modern, data-oriented style of web app development. Step 7 In the articles index page, click on the 'Delete' link. Uninstalling Go. 3+17110 contains a Cross ite Request Forgery (CSRF) vulnerability in Boxes that can result in CSRF admins to delete boxes. NOTE-- All parameters are mandatory unless otherwise noted. The web server is just a facilitator, it takes the request and hands it to your Rails application, which generates the. When passed this way, parameters are a list of key-value pairs separated by a space. But how does it work? If you came here to learn about link_to & the different options you can use with it then you're in the right place!. It can be used with any engine (bootstrap, jquery-ui, jquery only) and includes both popup and inline modes. Features include:. ruby-on-rails,ruby,ruby-on-rails-3,memory,heroku That log excert is from a one off dyno, a la heroku run console - this is entirely seperate to your web dynos which you may be runnning 2x dyno's for. The GLOBALS file stores parameters that relate to the Oracle GoldenGate instance as a whole, as opposed to runtime parameters for a specific process. Launch VS Code Quick Open (Ctrl+P), paste the following command, and press enter. This post tries to give an overview about the background and impact of the new Rails XML parameter parsing vulnerability patched today. With XML encoded parameters there are various typecasting possibilities. You can read/write in any public/private repo on github. Applications which pass user-controlled values to create_with could allow attackers to set arbitrary attributes on models. In this implementation, we'll proceed with our. In this tutorial I will show you how to build a blog platform using Ruby on Rails, we will make use of the gem ckeditor which is an integration gem for Ckeditor. The flash provides a way to pass temporary primitive-types (String, Array, Hash) between actions. This makes Action Controller parameters forbidden to be used in Active Model mass assignment until they have been explicitly enumerated. delete (key, &block) Link Deletes a key-value pair from Parameters and returns the value. To see your work: rake routes Create a controller: (controller. Today we are going to meet Carrierwave—one of the most popular file uploading solutions for Rails. Not only does it visually look better, in my opinion. About the game Factorio is a game in which you build and maintain factories. Remove a User. This is a tutorial for ajax use with Rails conventions. reCAPTCHA is a free service that protects your website from spam and abuse. rb, the Rails gods have given us a way of feeding default values easily and quickly to a fresh installation. What are resources? › Projects, comments. If you want to add additional parameters to the form_for helper, but still want to use one form for both your “create” and your “update” actions, you can add the additional parameters to the :url option, but you need to omit the :controller and :action keys. rb in your editor. How to update Rails versions and upgrade Rails applications. GR8Conf is a series of conferences founded to spread the word worldwide. Remove chromium, the Chromium web browser package. Windows: del file: rm foo. Browser js/css cache remains after Redmine application upgrade. Tips and Notes. rm -rf tree-app --actualize. This is a single SQL DELETE statement that goes straight to the database, much more efficient than destroy_all. This article shows how to add a new version of Rails while keeping an old version. NET, ActiveRecord for Ruby on Rails, EZPDO for PHP and many others. Browsers request pages from Rails by making a request for a URL using a specific HTTP method, such as GET, POST, PATCH, PUT and DELETE. rb in your editor. Only GitLab enables Concurrent DevOps to make the software lifecycle 200% faster. GR8Conf is a series of conferences founded to spread the word worldwide. If my post from a year ago is correct (and it seems to agree with those links) then the data should be in the entity body and not the URL. If not, we raise an. In this tutorial we'll install Ruby and Nginx on a DigitalOcean Ubuntu Droplet and configure Puma and Capistrano in our web app. If your macro definition contains a reference to a SQL Workbench/J variable, this will be treated the same way as in regular statements. , are between the employers and job applicants. permit (tags: []) Sometimes it is not possible or convenient to declare the valid keys of a hash parameter or its internal structure. We generally don’t need that kind of detail. However, I am going to show you how to select multiple checkboxes in Rails and delete all of the selected records at once. Returns true if a record exists in the table that matches the id or conditions given, or false otherwise. For implementing this app we'll use Ruby 2. Net MVC View to Controller. Rack::Request provides a convenient interface to a Rack environment. There are 2 things you usually want: parse JSON and generate/serialize into JSON format. The load restraint system consists of two sets of (4 rails) of steel horizontal load retainer rails installed on the interior side walls of the cargo area, two permanent bars at the nose, and a specified number of two (2) piece web-type strap assemblies to secure the cargo. The Presenter pattern addresses this problem by adding another layer of abstraction: a class representation of the state of the view. Web Browsers We're all familiar with surfing the web. This is step-by-step guide so you won't feel lost. - [Voiceover] My name is Kevin Skoglund. The complete SQLite database is stored in a single cross-platform disk file. このページに掲載しているサンプルプログラムは、シラバスの「はじめてのRailsアプリ 2chのかんようクローンアプリを作る」を参考にしました。 そのページではWebIDE(クラウド環境で開発ができる)のNitrous. It is designed to resemble the MVC architecture from frameworks like Ruby on Rails, but with support for the more modern, data-oriented style of web app development. Indicates whether Amazon S3 will remove a delete marker with no noncurrent versions. Where the Open Rails Train Developers can be contacted. Technique. It’s a feature we've all come to know and love using our favorite web apps. At least double the blocks you already have in your arsenal with this amazing set of new appearances and great functionalities combined to help you showcase any content in multiple ways without having to type a single line of code. if you need to remove your ruby session cookie on unix, look in /tmp for a file starting with ruby_sess and delete it. I'll tell you how to get Ruby on Rails running on your computer, and I'll give you an overview of the basic functionality of Rails and demonstrate how Rails' main parts work together. Whether you're new to Git or a seasoned user, GitHub Desktop simplifies your development workflow. When I am building a Rails app that I expect to be public facing in some sort of capacity, I don’t want to be displaying auto-incrementing, integer based IDs in my URLs. It deeply integrates with Vue. Vulnerability Rails even provide conveninent example!! # config/routes. From the resource and the selected route, Rails automatically determines the required URL and the required HTTP verb (in other words, whether it is a POST, GET, PUT or DELETE). list method. In Rails 5 you now have params. 9 前回作ったlessonプロジェクトにログイン画面を作ってみた。. For class Song, the initialize method takes three parameters. You don't need to change the protocol, host or path in this case so you can keep them the same. If set to true, the delete marker will be expired; if set to false the policy takes no action. 最近既存のコードを引き継ぐ形でRailsを触り始めました。 Railsの経験はなかったのですが、まあコード読めばわかるだろう、と思っていたら大間違い。 どうも不思議な魔法で動いている. delete (key) hash This is useful for limiting a set of parameters to everything but a few known toggles:. Ruby on Rails can seem overwhelming at first, but it doesn’t have to be! In this course, you'll follow along with step-by-step instructions for building your first web app in minutes. Later, you configure the Ruby on Rails application to connect to this database. A full-fledged example of an NGINX configuration. I am making an appointment app that holds a date range in one model (Project) and holds the available dates in another model (ProjectDate). user_params is a method, so when you do user_params. AngularJS is what HTML would have been, had it been designed for building web-apps. The argument can take five forms: Integer - Finds the record with this primary key. id AND producers. If you want to delete a record in to the database then you will use this method. (Optional) Delete the existing index by running one of these commands:. Following are some storage mechanism for sessions in Rails:. At the start of this year, I published a book through SitePoint titled Build Your Own Ruby On Rails Web Applications. It is a place to store data from first request that can be read from later requests. In my rails controller for update, my part of my params is "id"=>"1,2". params = ActionController:: Parameters. The generator will produce an empty app/admin/posts. add tables, remove. DataProcessor is a client-side library included into dhtmlxScheduler. The load restraint system consists of two sets of (4 rails) of steel horizontal load retainer rails installed on the interior side walls of the cargo area, two permanent bars at the nose, and a specified number of two (2) piece web-type strap assemblies to secure the cargo. Note: removing a user will immediately disable token verifications. Watch Queue Queue. We’ll be looking at two core elements: sending and receiving text messages and displaying them live in the web app using Action Cable. Routes are set up in config/routes. の機能を持つコントローラを考えます。 Viewは以下があるという認識で。 1. delete(:this_param), it computes the right hash, but any subsequent call to user_params will recompute the hash from scratch. ---get out of the folder. in Rails 4 params would contain an empty hash. RubyMine is an integrated development environment (IDE) that helps you be more productive in every aspect of Ruby/Rails projects development - from writing and debugging code to testing and deploying a completed application. Writes a new object to S3. A config var’s key should not begin with HEROKU_ unless it is set by the Heroku platform itself. NET Programmer Learn Ruby on Rails? or make your method signature parameters properly typed. rb # This is a legacy wild controller route that's not recommended for RESTful applications. com and I will look into it. This is also true if the app uses the feed dialog instead of the share dialog or if the app uses iframe web view. (Optional) Delete the existing index by running one of these commands:. Ruby on Rails 6. All that's needed is the create and destroy actions. Creating a social networking site often requires a self-referential association on the User model to define friends/followers. Many of the examples can be run (where it makes sense) by pressing the button on the right. RubyMine is an integrated development environment (IDE) that helps you be more productive in every aspect of Ruby/Rails projects development - from writing and debugging code to testing and deploying a completed application. They typically upload the file to Heroku and then stream it to S3. In this form there are a bunch of checkboxes, the values of which you want to persist to your database. If you're using Rails 5. params = ActionController::Parameters. delete(path) Execute a DELETE request. 1を前提とします。 コントローラの責務コントローラには次の責務があります。ユニットテストでは責務に対するテストを行います。. Note: You can watch your Rails console when creating a new post, you’ll be able to see the response to the create controller which contains a parameter called category_id with information. This approach means that it can also be used with earlier versions of Rails. You can watch this tutorial as a screencast Using Ajax and jQuery in Rails 5 Apps. Using the Paloma Gem. Ruby lets us remove the extra parens and braces, leaving the stripped-down function call above. Step 7 In the articles index page, click on the 'Delete' link. Wardenとは? 導入 1. After reading this guide, you will know: The generators you can use to create them. It deeply integrates with Vue. In my rails controller for update, my part of my params is "id"=>"1,2". Active Record MigrationsMigrations are a feature of Active Record that allows you to evolve your database schema over time. Improve Readability. Download RESTClient, a debugger for RESTful web services. Brakeman is now distributed under the Brakeman Public Use License which restricts commercial use of Brakeman. params set to nil on controller when an empty hash is passed to a param in test case. It provides a capability to execute page-specific JavaScript and it provides an easy way. dhtmlxGantt with Ruby on Rails. The original release of this highly useful plugin marked a turning point in collaborative Rails development by freeing the developer to commit their database migration without fear of having it ignored because of a higher placed migration number. About the author Itay Grudev is a student currently pursuing a degree in Computer Science and Physics at the University of Aberdeen, United Kingdom. This is a single SQL DELETE statement that goes straight to the database, much more efficient than destroy_all. Following are some storage mechanism for sessions in Rails:. Instructions and advice. Ruby on Rails 6. Adding Additional Parameters to form_for. param() method serializes deep objects recursively to accommodate modern scripting languages and frameworks such as PHP and Ruby on Rails. Launch VS Code Quick Open (Ctrl+P), paste the following command, and press enter. New ways to handle file uploads, share credentials with your team, set up Content Security Policy, even start your application—we are looking at what's new in Rails 5. Re: Delete old CAI Events and Params Suyog Bandhaokar Nov 15, 2013 3:55 AM ( in response to Hendy Hendy ) It is the last form you would want the records to be present. Quickly and easily develop desktop, mobile, and web applications with Java, JavaScript, HTML5, PHP, C/C++ and more. RSpec Rails Controller Test - DZone Web Dev. The values can be false to just filter them out,. The parsed parts of the URL are passed as parameters to the route callback. Undo: When you make a mistake (accidentally delete a component, etc. This is a single SQL DELETE statement that goes straight to the database, much more efficient than destroy_all. I don’t think anyone would have ever said using the Asset Pipeline in Rails was easy, but now with Webpacker, learning to add Javascript to Ruby on Rails is definitely worth the effort. You can read/write in any public/private repo on github. Issue comes up when HTTP_REFERER is not present and which in turn throws exception. Please take the time to understand how the parameter my_param makes it through to the template. It is designed to resemble the MVC architecture from frameworks like Ruby on Rails, but with support for the more modern, data-oriented style of web app development. When I am building a Rails app that I expect to be public facing in some sort of capacity, I don't want to be displaying auto-incrementing, integer based IDs in my URLs. Just map to an empty hash: params. Active Record automatically allows an application to read and manipulate data stored within tables. Basic sqlite3 meta commands. Welcome to Ruby on Rails Essential Training. Ruby on Rails File Upload with introduction, characteristics, installation, hello world, directory structure, active record, mvc, rvm, bundler, router, scaffolding etc. Rack rails or rack strips are generally used to mount rackmountable equipment into racks. I am wondering if the following is a good idea or not. In fact, it’s overkill to the point that even the Rails team has recognized this and has therefore introduced a new API-only mode in version 5. Three out of five times I have to fire up the docs and search for the examples (cause that's how I like to read the docs). Each method is a request to perform an operation on the resource. A resource route maps a number of related requests to actions in a single controller. Description. rails generate scaffold friend name:string address:string 次のようにいくつかのファイルが自動的に作成されます。 では作成されたファイルについて確認していきます。 モデルとマイグレーションスクリプト. To retrieve calendar IDs call the calendarList. You can additionally define a number of optional configuration parameters if relevant. org over HTTP. The first is to simulate HTTP's uniform interface for clients like web browsers that don't support PUT or DELETE" — RESTful Web Services , Leonard Richardson & Sam Ruby. This makes Postman a great tool for exploratory testing once the bugs are found. This is before pressing the Delete button your table: After pressing Delete key: Above you will see the vs1491’s information will remove permanently from our table. 0 when a column or a table is renamed the related indexes are also renamed. If you prefer to use a different PostgreSQL server, you can deploy this sample app to Google Cloud Platform (GCP) and configure it to use any PostgreSQL server of your choice. These serve two functions: they supply fuel to a multiple number of injectors (4 on a 4 cylinder, for example), and they physically locate the tops of the injectors. delete_all(conditions = nil) public Deletes the records matching conditions without instantiating the records first, and hence not calling the destroy method nor invoking callbacks. permit_all_parameters - If it's true, all the parameters will be permitted by default. There are a few example applications available on GitHub that demonstrate various features of Devise with different versions of Rails. com articles " The Restful Web " are very useful. In Object Explorer, connect to an instance of the SQL Server Database Engine, expand that instance, and then expand Databases. See the code in action! Using image for submitting the form. 得到的 params[:addresses] 是散列构成的数组,散列的键包括 line1、line2 和 city。如果 Rails 发现输入控件的名称已经存在于当前散列的键中,就会新建一个散列。 不过还有一个限制,尽管散列可以任意嵌套,但数组只能有一层。数组通常可以用散列替换。. delete(:admin) sanitization as with the following payload: user[admin(1)]=true As the multiparameter attribute gets parsed in user. I'm sure it comes as no surprise that this experience is made up of a series of requests and responses. Rails session is only available in controller or view and can use different storage mechanisms. ), you can undo the action by click on the Undo icon in the toolbar (shortcut key is ‘u’). I have done in Code behind. Web applications will typically have a small handful of pages that take an exceptionally long time to load. The data can be specified in different ways. A tutorial on how to use the RSpec tool for testing Ruby on Rails based web applications, from how to organize your data to the various types of tests. If given two parameters, thense defined the range of the charactes (beginning included, end excluded). user_params is a method, so when you do user_params. All subscriptions should be cancelled. In addition, if you’re using Subversion or another versioning system, you could add the version information to the end of the CSS file. Chances are if you're reading this you've built a traditional server-rendered web application with Rails before. Chances are if you're reading this you've built a traditional server-rendered web application with Rails before. ruby-on-rails,ruby,ruby-on-rails-3,memory,heroku That log excert is from a one off dyno, a la heroku run console - this is entirely seperate to your web dynos which you may be runnning 2x dyno's for. For implementing this app we'll use Ruby 2. Welcome to Ruby on Rails Essential Training. new(tags: ["rails", "parameters"]) params. Dynamically add and remove input field in rails without javascript when dealing with nested form field using accepts_nested_attributes_for in ruby on rails, I always tempted to ada feature where the user can dynamically add or remove form field on the form. View M2X API Docs for listing of. Ruby on Rails. Rails always comes up with some and creative new features, and Rails 4 is no exception. From the resource and the selected route, Rails automatically determines the required URL and the required HTTP verb (in other words, whether it is a POST, GET, PUT or DELETE). Returns true if a record exists in the table that matches the id or conditions given, or false otherwise. When naming inputs, Rails uses certain conventions that make it possible to submit parameters with non-scalar values such as arrays or hashes, which will also be accessible in params. A config var’s key should not begin with HEROKU_ unless it is set by the Heroku platform itself. NOTE: This article is written for Rails 4. There are only two parameters: the name (“View Post”) and a hash with 3 key/value pairs. You may want to read more about Ruby on Rails API in order to understand the this chapter. In this tutorial we'll install Ruby and Nginx on a DigitalOcean Ubuntu Droplet and configure Puma and Capistrano in our web app. In the future, I will write about these frameworks and how to use them with Rails. Install Rails gem install rails rails _5. In the first form, if no arguments are sent, the new array will be empty. This is very handy for debugging but sometimes it’s not desirable to have certain parameters, such as passwords, stored as plain text in the log. params = ActionController:: Parameters. For information on contributing see the Ubuntu Documentation Team wiki page. Be extra cautious with this as it would be too bad to delete something you still need :-. Create your database. This is a term invented by Roy Fielding to describe a standard way of creating HTTP APIs. This approach means that it can also be used with earlier versions of Rails. All that's needed is the create and destroy actions. params [" data "]. If no locale is specified in the URL the default locale will be used in all cases. It provides an interface for protecting attributes from end-user assignment. Ruby on Rails Tutorial Learn Web Development with Rails Michael Hartl Newly updated for Rails 6, the Ruby on Rails Tutorial book and screencast series teach you how to develop and deploy real, industrial-strength web applications with Ruby on Rails, the open-source web framework that powers top websites such as GitHub, Hulu, Shopify, and Airbnb. Groovy, Grails, and related technologies have seen astounding growth in interest and adoption over the past few years, and with good reason. It helps map a specific action to all the possible HTTP request methods: GET, POST, PATCH, DELETE, etc. You should also remove the Go bin directory from your PATH environment. Each method is a request to perform an operation on the resource. The create_with functionality in Active Record was implemented incorrectly and completely bypasses the strong parameters protection. They also review a little bit of information about metaprogramming and Ruby. Returns a new array. The default is false. For example, to delete all films produced by a given producer, one might do. Ajax enables you to retrieve data for a web page without having to refresh the contents of the entire page. Browser js/css cache remains after Redmine application upgrade. $ git clone https://github. It provides a very clean method API to help keep controllers DRY. Alternatevily you can use the command WbVarDelete myvar to remove a variable definition. However, I am going to show you how to select multiple checkboxes in Rails and delete all of the selected records at once. Be careful, these edges can be sharp. find_by_token(params[:user][:token]) if user #reset password here end end Such a token like the one pulled out of params in the code above typically is a random string, for now let's just assume this string is "IAmARandomToken". The argument can take five forms: Integer - Finds the record with this primary key. A tutorial on how to use the RSpec tool for testing Ruby on Rails based web applications, from how to organize your data to the various types of tests. Learn Ruby on Rails Web Services and Integration with MongoDB from Johns Hopkins University.