If you want to know more about form_with then you can peruse the original DHH's proposal, check the pull request in which it was implemented, check the API documentation and play with it in a test project. This is not a full on tutorial because I didn't implement it fully but rather my understanding of how it works. Ruby on Rails 5. Get Started Ruby on Rails guides, screencasts, and tutorials for web developers learning Ruby, Rails, Javascript, Turbolinks, Stimulus. [Rails] Render 404 Error instead of 500 on ::ActionController::RoutingError. In Rails, incoming requests are routed by Action Dispatch to an appropriate controller, and controller classes are derived from ActionController::Base. A plea for integrating a gem into Rails. As of Rails 4. As new code gets added, Rails controller actions can get “fat”. We'll do the runner first. GitHub Gist: instantly share code, notes, and snippets. html # index. haml format. Rails provides a very simple way to generate xml. Merchant Marine vessels transit Pearl Harbor, Hawaii. Rails remote code execution using render :inline Description Ruby on Rails web applications that pass unverified user input to the render method in a controller or a view may be vulnerable to a code injection. Because the apps you create run on the same infrastructure that powers all of Google's products, you can be confident that they can scale to serve all of your users, whether there are a few or millions of them. Calling render will create a full response that is sent back to the browser. All Photos | IRender nXt is the premier, easy to use rendering tool for SketchUp. Welcome to another installment in my Let’s build with Ruby on Rails: Extending Devise series. That said, I would prefer to leave the rendering stack simpler without need to check for extra flash keys. 78% improvement of test application Using a new gem I created, I was able to optimize a Rails action by 78% (152 ms to 34 ms). Here's how I set up Minitest with Rails, and the gotchas I encountered along the way. Render Async is a great idea to render asynchronously part of the content. All content Product Data Sheet Literature Case Studies BIM Objects Products in NBS Companies Technical Summaries Advisory Organisations OLS Keyfiles BBA Certificates CPD RIBA Online CPD. A request hits the app, a route is matched to a controller action from routes. Handle formats at the controller level. " An illness might render you unable to walk, or a shocking site might render you speechless. It started simple enough. Return render in Ruby on Rails. Heroku has an ephemeral file store , so while page caching may appear to work, it won't work as intended. The Complete Ruby on Rails & 3D Rendering Humans for Games Hands-on training content is the best way to get from A to B. If your app has a url that reads something like /employees?company_id=1 , a switch to nested resources would cause it to read /companies/1/employees. Customers are complaining, and your infrastructure team is provisioning even more servers but it is just not helping. This post summarizes how to pass data from a Rails application to the client and how to execute JavaScript code in Rails views. Rails Contributors - All time Showing 5436 people. Rails can render templates and files, making it possible to also render images, raw text and various file formats like html, xml, json, and txt. A vulnerability recently discovered in the Ruby on Rails web framework may allow attackers to read arbitrary files from the server file system by sending a request that contains a specially crafted Accept header. I am having difficulty with the rails render_to_string function. 该篇文章在个人博客中也可查阅:Rails render 和 redirect_to 进阶理解 基本用法 不同的跳转姿势 Rails 新手开发者会简单地认为 redirect_to和 goto指令一样,单纯地跳转执行 Rails 代码,这是不正确的。. Gemfile gem prawn. The Rails application will be vulnerable only if it calls the render function in one of. I lost some time searching for a solution, so here's the summary of the solution to save others the hassle. The content from a Rails view is inserted where you place the yield keyword. axlsx templates. Basically the application makes an API call to twitter and searches for all tweets which include '@youtube' in the tweet text. Ruby on Rails - Render - Usually the view template with the same name as the controller method is used to render the results. The Rails application will be vulnerable only if it calls the render function in one of. Unfortunately for us, the documentation is not very helpful either. This package provides commands to open file depending on file which is being opened by active editor. According to the documentaiton on Rails Api, AbstractController::Rendering comes in default and this Module contains the render_to_string method. Using A Model As A Camera. render synonyms, render pronunciation, render translation, English dictionary definition of render. All Photos | IRender nXt is the premier, easy to use rendering tool for SketchUp. comments, but here we'll focus on usage within the controller. Never render layout for XHR requests in Rails 2014-09-20 In Ruby on Rails, it’s easy to set the application-wide default to never render a layout in response to XHR requests. Rails offers a great way to render a collection using a partial by passing the collection option to the render method. If you do not have a render or a redirect_to in your controller method for a particular action then Rails will automatically render the template for that action. A view is what the user sees. It precisely targets only the styles that need normalizing. The issue is, that the list of prospects is actually the part that needs to be rendered on the page, so this was not. A ship passing the USS Arizona Memorial renders honors by sounding, “Attention,” and all hands topside render a hand salute until the ship has passed the. Gemfile gem prawn. Ruby on Rails contributors. To test out this fresh-baked RenderFilter you just have to require this file or files (depends how you decided to organize your code) and define a before_render :foobar in your controller just like you would use any other Rails dispatch filter. Get Started Ruby on Rails guides, screencasts, and tutorials for web developers learning Ruby, Rails, Javascript, Turbolinks, Stimulus. A component with a render prop takes a function that returns a React element and calls it instead of implementing its own render logic. All other controllers inherit from ApplicationController. Join Kevin Skoglund for an in-depth discussion in this video Rendering templates, part of Ruby on Rails 4 Essential Training Lynda. When refactoring rails controllers you can stumble upon one gottcha. It's very easy to use and provides a lot of flexibility in defining exactly what attributes are included in and how the response is formatted and nested. So what you can do is this: define a method in your controller and put all the page. Rails Casts has a free episode which goes into greater detail about Jbuilder. Alternatively, you can render JSON output by. Grails relies on expressive domain-specific languages (DSLs) for validation, querying, markup rendering, and more. Ruby on Rails 6. There is a rails method called render_to_string which can really help you out. You can cache each layer of the view. CVE-2016-0752. It takes an opinionated approach to application development, assuming that set conventions best serve developers where there is a common goal. In many routes there are glichy scenery like that in the attached picture. log(resp) and actually use jQuery to replace the initial div with your content/html the server will return. comments, but here we'll focus on usage within the controller. -Redirect is used to tell the browser to issue a new request. IDE Support Developers can access support at any time via IDEs and text editors, such as Intellij IDEA, Eclipse, Sublime, and Textmate. Rails is a web application framework written in Ruby. I am having difficulty with the rails render_to_string function. 14 I recently spent a while learning how to do custom AJAX queries with jQuery and Rails 3. Let's dig into the grid system in a little more detail before integrating Bootstrap into your application. 0 Release NotesHighlights in Rails 6. If you are still getting billed, please email me at [email protected] No observers. A controller is a server-side component of Rails that responds to external requests from the web server to the application, by determining which view file to render. The controller is also a home to a number of important ancillary services. This how-to guide aims to give you the best start to building your Rails API. Whereas, render is a method used to create the content. Check out axlsx_styler by sakovias for easier styles and borders! Usage. "Before stumbling upon Hrishi's Complete React on Rails course, I had been browsing for numerous articles, and youtube videos on how to learn React. That gem provides a Rails engine to get up and running with static pages quickly and provides some helper methods as well. axlsx templates. I decided to pick this course because it is project based. infer_spec_type_from_file_location! by placing them in spec/controllers. First thing's first. Server-Side Rendering with Node server: Use serverside rendering using ReactDOMServer and headless browser protocol to render HTML and JS and generate a pdf. The problem is that Rails's SimpleFormatter's call method is a bit dumb compared to Ruby logger's call method. This includes both code snippets embedded in the card text and code that is included as a file attachment. The new default headers setting that has been added to rails 4 makes it really easy to set HTTP headers across your app. Rendering of partials from the controller makes it possible to use the same partial template in both the full-page rendering (by calling it from within the template) and when sub-page updates happen (from the controller action responding to Ajax calls). The Rails controller is the logical center of your application. We started with a regular rails application and went through the process of installing and configuring Webpacker, React, and React on Rails. On average the cached renders were 55 times faster. This post will also assume you have generated a new Rails app with rails new app_name and running a rails server on the default port 3000. infer_spec_type_from_file_location! by placing them in spec/controllers. Models that inherit from ActiveRecord::Base will return a partial name based on the model's name by default. With an empty response, it defaults to a content type of text/html. Suppose we have a Rails app that serves widgets, and there is a widgets/index. We can do a script two ways. com courses again, please join LinkedIn Learning. It adds the :xlsx format and parses. Our next step is to create a template for our action to render. Handle formats at the controller level. Writing it like this makes it look the render returns a meaningful value that is then returned by create and used by the code that calls create, which is not the case. From Rails guide. 78% improvement of test application Using a new gem I created, I was able to optimize a Rails action by 78% (152 ms to 34 ms). Slim is a Ruby template language whose goal is reduce html syntax to the essential parts without becoming cryptic. If your app has a url that reads something like /employees?company_id=1 , a switch to nested resources would cause it to read /companies/1/employees. This is a very in-depth guide for those who are already familiar with client-side Vue development, server-side Node. com is now LinkedIn Learning! To access Lynda. fullpath` set when the developer supplies them View specs render the described view file. rb, so put that right before require 'rails/all' require statement and. They are used to ensure that only valid details are entered into your database. Jbuilder is included with Rails, so it is used quite a bit. It coordinates the interaction between the user, the views, and the model. (2 replies) render_to_string returns the result of executing some template or partial in a string instead of sending it as the response body to the browser. What now? That can happen as. In many routes there are glichy scenery like that in the attached picture. The whole process works fine when using ionic serve, however using ionic emulate or when building in xcode the authentication process fails. Faster Rails partial rendering and caching. Ruby on Rails Templates and Layouts (Page 1 of 2 ). You know your Rails application is slow at times. A controller is a server-side component of Rails that responds to external requests from the web server to the application, by determining which view file to render. rb file, or in a specific environment you add to the hash of default headers that Rails adds to every response:. Here I will show you the contrast. Basically the application makes an API call to twitter and searches for all tweets which include '@youtube' in the tweet text. The ultimate goal of your Ruby on Rails application is to render a view. By default, only the ApplicationController in a Rails application inherits from ActionController::Base. In this hands-on tutorial, Hrishi Mittal shows how to build an idea board React app that works with a Rails 5. to your freshly created Rails project or an existing Rails project. The Holy Grail. 2: Active Storage Redis Cache Store HTTP/2 Early Hints Credentials Content Security Policy These release notes cover only the major changes. A Ruby developer goes over the redirect_to function in the Ruby-on-Rails framework, what it is used for in apps, and the code devs need to use it properly. A view is what the user sees. In the last episode we talked about importing from CSV files to create records in your rails application, and in this episode we're going to talk about exporting those same records, we're going to use the same CSV libraries before, and you're going to want to make sure that you have a require 'csv' inside your application. I am ready to start learning Rails with GoRails screencasts. Let's look at two ways we can accomplish this. After configuring, we replaced our search to be a react component which dynamically fetches and renders search results from a new JSON endpoint on our Rails app. Along the way we will explore the Rails rendering stack and get a better handle on the Rails code, which will make the custom code work easy!. We are going to render this template inside our script. Keep up to date with Rails on Twitter and This Week in Rails. * render * render-action * render-action-layout. Attention! This article assumes you have at least a basic understanding of Ruby on Rails In Ruby on Rails there is a good convention with partials. Suppose we have a Rails app that serves widgets, and there is a widgets/index. It started simple enough. The united UI layer. Rendering A Rails Partial As A jQuery Template. All source code included in the card Render a view from a model in Rails is licensed under the license stated below. rails render and content type. Pretty simple to get going, but my biggest complaint is that I have to define my data on the rails side for server rendering. A request hits the app, a route is matched to a controller action from routes. erb inside the views folder…. Even though I love Rails, I hate the way it locks you into only working within its paradigm, making it virtually impossible to break out of the MVC box even when it makes far more sense to do so. remote exploit for Multiple platform. All other controllers inherit from ApplicationController. erb Youll need to edit the console. I had to write Javascript, use Redux, write Mocha tests, rspec tests, and rails code for implementing the feature. Now, you will learn about the View templates, naming of template files, ERB tags, and how to use ERB tags in HTML templates. Controllers load and manipulate models, and render view templates in order to generate the appropriate HTTP response. render :xml => @product You don’t need to call to_xml on the object that you want to render. It’s the culmination of all the work your app has to do , combining logic, data & view templates to serve the user’s request. This avoids additional round-trips for data fetching and templating on the client, since it’s handled before the browser gets a response. js, and more. Place some barrier blocks so that they curve. How to create PDFs from HTML with PDFKIT How to render inline PDFs. Railsのコントローラーでのrenderメソッドの使い方について説明します。 renderメソッドは、「コントローラー(Controller)」と「ビュー(View)」のそれぞれにあります。 ここではコントローラーのrenderメソッドの使い方を示します。. What now? That can happen as. How to replicate: 1. We have enough to get started with. One final thing – usually Rails infers the content type from the content itself. Rails make it easy to add validations to your model classes and allows you to create your own validation methods as well. Jbuilder is included with Rails, so it is used quite a bit. Rails Transporter. Pretty simple to get going, but my biggest complaint is that I have to define my data on the rails side for server rendering. The controller is also a home to a number of important ancillary services. You can render text, JSON, or XML. The term “render prop” refers to a technique for sharing code between React components using a prop whose value is a function. Rails render_to_string. render: [verb] to treat so as to convert into industrial fats and oils or fertilizer. It is easy to read by humans and easy to parse by. comments to get a list of Comment objects that belong to the @post object. Rails can render templates and files, making it possible to also render images, raw text and various file formats like html, xml, json, and txt. render controllerで処理した結果の出力先Viewを指定する controllerのインスタンス変数は、そのままViewに渡される redirect_to 指定したcontroller、actionに再度リクエストを送信 controllerのインスタンス変数は、リダイレクト先で新たに生成 参考記事 [Rails] renderとredirect_to. According to the documentaiton on Rails Api, AbstractController::Rendering comes in default and this Module contains the render_to_string method. remote exploit for Multiple platform. Ruby on Railsガイドの以下のページでもrenderについて触れていますので、もっと詳しく知りたい方はこちらも参考にしてください。 参考: 準備 renderの動作を確認するために、Ruby on Railsをインストールして、Railsサーバーを起動しておきましょう。. This gem depends on Axlsx. A plea for integrating a gem into Rails. The united UI layer. This is a very in-depth guide for those who are already familiar with client-side Vue development, server-side Node. This comes in handy if you want to attach, say, an HTML receipt to an order confirmation email, or render an HTML template for wkhtmltopdf to convert to PDF. " Default rendering is an excellent example of this. [code] # Inside your controller: referer = env['HTTP_REFERER'] routes = env['action_dispatch. Whereas, render only works in case the controller is being set up properly with the variables that needs to be rendered. Another even more abstract method Rails gives us to do this is passing an array directly to the render method. One is with rails runner, and one is just with ruby. Heroku has an ephemeral file store , so while page caching may appear to work, it won't work as intended. A ship passing the USS Arizona Memorial renders honors by sounding, "Attention," and all hands topside render a hand salute until the ship has passed the. Notice that you are capitalizing Book and using the singular form. I don't think the --api flag is the problem. Each rail is a line segment, arc, or bezier curve positioned in 3D space. 0 Release NotesHighlights in Rails 6. Get Started Ruby on Rails guides, screencasts, and tutorials for web developers learning Ruby, Rails, Javascript, Turbolinks, Stimulus. 3, we can also simplify render in controllers. (2 replies) render_to_string returns the result of executing some template or partial in a string instead of sending it as the response body to the browser. 1 you must use render_to_string to render a mail attachment. Rails::Engine allows you to wrap a specific Rails application or subset of functionality and share it with other applications or within a larger packaged application. 1 introduced the asset pipeline in August 2011. Quick overview of Grid. An action is defined as a public method on the controller, which will automatically be made accessible to the web-server through Rails Routes. Pretty simple to get going, but my biggest complaint is that I have to define my data on the rails side for server rendering. This includes both code snippets embedded in the card text and code that is included as a file attachment. It coordinates the interaction between the user, the views, and the model. Record - The URL will be generated by calling url_for with the options. We can do a script two ways. It comes with many flavors including: Render Action : render an action in the current controller, you can specify if you want layout printed or not. I just finished writing together yet another convoluted system to allow a Rails app to send a file and render a page or redirect. There seems to be a fixed overhead for every partial, as well as garbage collection kicking in when rendering a lot of partials in a view. Also, I'm guessing from the code that I'd call this with something like render user and to_partial_path would select the correct partial, right? \$\endgroup\$ - GorrillaMcD Nov 14 '12 at 21:59 \$\begingroup\$ @GorrillaMcD it's (negligibly) more verbose, but arguably more correct, since it's "the Rails Way" to have a model define its partial path. You can cache each layer of the view. The problem is that Rails's SimpleFormatter's call method is a bit dumb compared to Ruby logger's call method. IDE Support Developers can access support at any time via IDEs and text editors, such as Intellij IDEA, Eclipse, Sublime, and Textmate. Ruby on Railsガイドの以下のページでもrenderについて触れていますので、もっと詳しく知りたい方はこちらも参考にしてください。 参考: 準備 renderの動作を確認するために、Ruby on Railsをインストールして、Railsサーバーを起動しておきましょう。. The controller is also a home to a number of important ancillary services. rails render and content type. Whereas, render is a method used to create the content. Keys can be auto formatted using key_format!, this can be used to convert keynames from the standard ruby_format to camelCase:. This is a Rails. One final thing – usually Rails infers the content type from the content itself. For example if you have a blog with multiple posts then you use something like render partial: 'posts/post', collection: @posts, cached: true to cache the rendering of the posts. Render the partial but without a layout, like this render partial: 'some/thing', layout: false, that will return only the exact HTML you want without the surrounding layout. First thing's first. Slim is a Ruby template language whose goal is reduce html syntax to the essential parts without becoming cryptic. And have you ever wanted to render an action which expect some parameters ?!. On average the cached renders were 55 times faster. Our partial renders with the output of “this is a partial. Rails render partial from sub-directory Posted: 19 Jan 2017 08:31 AM PST I've just implemented the Devise Invitable gem in my rails app and now I'm having an issue getting my partials to render. Rendering partials. Thanks for your patch but tendering flash. Mountains and stuff at far away doesn't render correctly. The 13-year-old framework gives you a plethora of tools out of the box, which allows building complete applications in a very short time. ActionController::Rendering#render_to_string render_to_string (options = nil, &block) protected Renders according to the same rules as render, but returns the result in a string instead of sending it as the response body to the browser. In this tutorial, you'll see a very simple example of how to send a JavaScript response from the server and some of the more interesting things that can be done. Suggestions fo Open Rails Roadmap Improvements to Side Tank Engines Define specific LightGlow for train Suggestions and Ideas For Open Rails Roadmap Bi - Modular Engines Environment Real time weather Storm and lightning weather effects Refine sunrise and sunset times Water visual improvements Lights and Freight Anims. If you want to know more about form_with then you can peruse the original DHH's proposal, check the pull request in which it was implemented, check the API documentation and play with it in a test project. A rail's geometry is generated by assigning positions and a width to a Unity Line Renderer and positioning it on the map. Rendering Resolution. Introduction. comments, but here we'll focus on usage within the controller. rb, so put that right before require 'rails/all' require statement and. Rails remote code execution using render :inline Description Ruby on Rails web applications that pass unverified user input to the render method in a controller or a view may be vulnerable to a code injection. A component with a render prop takes a function that returns a React element and calls it instead of implementing its own render logic. The 13-year-old framework gives you a plethora of tools out of the box, which allows building complete applications in a very short time. Record - The URL will be generated by calling url_for with the options. We are going to render this template inside our script. Grails relies on expressive domain-specific languages (DSLs) for validation, querying, markup rendering, and more. Ruby on Rails Tutorial Learn Web Development with Rails Michael Hartl. Similar to CVE-2014-0130, using dynamic render paths can lead to directory traversal and code execution. The number of calls to render the partials was only 29. It coordinates the interaction between the user, the views, and the model. If the message it is going to print is of class Exception then it prints backtrace also. For Rails 5 we're massively speeding up rendering collections of cached partials. Rails's redirect_to - DZone Web Dev. Which would render the following: Further Reading. To learn more about why Rails is so different from many other web-application frameworks and paradigms, examine The Rails Doctrine. Noteworthy here is the respond_to method invoked near the top that will allow us to render both html and javascript responses with all of our controller actions. Before the advent of Rails 5, the best option for building APIs in Ruby was arguably Grape. , are between the employers and job applicants. Coast Guard, and U. Rails by default comes with an asynchronous queuing implementation that runs jobs with an in-process thread pool. Re-render the entire app on every change. Minitest is a fast, easy to read alternative to RSpec for writing Rails tests, but it can be confusing at first. We'll also cover how integration tests can sometimes serve as a replacement for controller tests. Attention! This article assumes you have at least a basic understanding of Ruby on Rails In Ruby on Rails there is a good convention with partials. Most developers encounter it within the view template, using render :partial => 'form' or render @post. The problem is that Rails's SimpleFormatter's call method is a bit dumb compared to Ruby logger's call method. This command provides 2 features. Alternatively, you can render JSON output by. Join Kevin Skoglund for an in-depth discussion in this video Rendering templates, part of Ruby on Rails 4 Essential Training Lynda. We have enough to get started with. This gem depends on Axlsx. If you use the :xml option, render will automatically call to_xml for you. We have seen in our previous tutorial about how controller loads view based on the url. axlsx templates. 1) to fetch multiple keys at once. In this hands-on tutorial, Hrishi Mittal shows how to build an idea board React app that works with a Rails 5. This course is full of practical examples. Similar to CVE-2014-0130, using dynamic render paths can lead to directory traversal and code execution. After reading this guide, you will know: How to use the various rendering methods built into Rails. IDE Support Developers can access support at any time via IDEs and text editors, such as Intellij IDEA, Eclipse, Sublime, and Textmate. The term “render prop” refers to a technique for sharing code between React components using a prop whose value is a function. Let's start by creating a new Rails application called BaseballApp and then generate a Player resource with name and batting average attributes. Hi, I have some scenery drawing issue in Open Rails. While your application benefits from this setup, specifying appropriate cache headers for all requests, even dynamic ones, can give you an order of magnitude improvement in response times, user experience and resources required to power your application. json { render :json => { 'key' : 'value' } end. Now, you will learn about the View templates, naming of template files, ERB tags, and how to use ERB tags in HTML templates. Controllers load and manipulate models, and render view templates in order to generate the appropriate HTTP response. In this post, I'm going to explain how does Rails renders your templates from Ruby. Ruby on Rails - Render - Usually the view template with the same name as the controller method is used to render the results. If view rendering is taking enough time that you're considering speeding it up I would turn to fragment caching for the heavy parts (http://guides. ren·dered , ren·der·ing , ren·ders 1. By default, Rails will render a template that has the same name as the action being called, and it will look for that template in a directory whose name matches the current controller name. Join Kevin Skoglund for an in-depth discussion in this video Rendering templates, part of Ruby on Rails 4 Essential Training Lynda. Gemfile gem prawn. No magical data binding. Alternatively, you can render JSON output by. It adds the :xlsx format and parses. In this post, I'm going to explain how does Rails renders your templates from Ruby. Ruby on Rails Tutorial Learn Web Development with Rails Michael Hartl. Our services include interlibrary delivery, shared catalog support, continuing education, consulting, shared e-book collections, cooperative purchasing, and more. To force it to return an application/json content type we could specify the format inline in that render call, but we can go one better and specify json as the default format in our routes file:. json { render :json => { 'key' : 'value' } end. The 13-year-old framework gives you a plethora of tools out of the box, which allows building complete applications in a very short time. form_tag, form_for, form_with… Which one should I use? (pixabay. Current information obtained by google does not seem to provide all the info needed to generate custom xml. Heroku has an ephemeral file store , so while page caching may appear to work, it won't work as intended. This is a Rails. This course is full of practical examples. In my experience using Rails with HAML views, lots of small partials does slow rendering significantly. If you are interested in learning more about the Ruby language, then please go to the Ruby Programming book. If the message it is going to print is of class Exception then it prints backtrace also. This takes all the same options as render but returns a string instead of sending a response back to the browser. The render method is very overloaded in Rails. There is a rails method called render_to_string which can really help you out. Maybe we could add some option like "Rails. Keep reading to find out how to generate your own custom xml for your rails 2. #RUBYONRAILS #API #JBUILDER To make our codebase scalable we have to use views to craft our JSON response. If you want to submit a form using AJAX you can do this without having to write an AJAX request. Intermediate Rails: Understanding Models, Views and Controllers Home › Web › Intermediate Rails: Understanding Models, Views and Controllers I'm glad people liked the introduction to Rails ; now you scallawags get to avoid my headaches with the model-view-controller (MVC) pattern. fullpath` set View spec actions that require extra parameters have `request. However, form markup can quickly become tedious to write and maintain because of the need to handle form control naming and its numerous attributes. Here's how I set up Minitest with Rails, and the gotchas I encountered along the way.