ruby on rails tutorial michael hartl

1. Auxiliary methods2. StringEnter "IRB" into the ruby command-line development environment, and the controller starts by executing "rails console" on the command line.(1) String connection>>"foo"+"bar"="foobar" (2) Interpolation by special syntax #{}>>first_name="Amy" ="Amy">>" #{first_name} Sun"+"Amy Sun "(3) The difference between a single-quote string and a double-quote string: Single-quote strings the

about REST, SOAP, Rails Active Resource, and how to improve interoperability between multiple applications. Ruby on Rails Ruby on Rails (also known as rails or RoR) is an open source Web application framework written in

Before you start About this tutorial Ruby on Rails (rails) is a full-stack WEB application framework written in Ruby, and Ruby is a rich, free, extensible, portable, object-oriented scripting language.

Images can be said to be a critical part of any application. From social networks to a simple bug tracker, images play an important role. Managing images, however, is not an easy task and requires a lot of time and energy to plan ahead. This article demonstrates how to achieve this goal in rail. How do you handle your images and create multiple versions in the background? How to improve the performance of the page by compressing the image without compromising the image quality? These are the on

Tutorial on efficient unit tests on Ruby on Rails, rubyrails In the system developed by the author, a large amount of data needs to be analyzed, which not only requires accurate data analysis, but also requires a certain speed. Before writing the test code, I used several major methods to achieve this requirement. As you can imagine, the code is complex, difficul

Learning and developing the Ruby on Rails application process is done on the local computer. That is, you need to create a Rails project on your local computer, run it, and then learn or do real development. Either way, you can install all the tools for the rails project directly on your local computer, and then run th

1. Goal: Mastering MVC and Rest, generators, migrations, routes, embedded RubyThis book deals with the Rails,ruby language, the test framework (minitest) that rails uses by default, the Unix command line, HTML,CSS, a small amount of javascript, and a bit of SQL.2. Demo Application:Hello_app (v. 1.3)Toy_app (2nd Chapter)Sample_app (chapters 3rd through 12th)3. The

If you've never heard of rails, you're welcome to return from an extraterrestrial trip, and in recent years it's probably the only place that hasn't heard of Ruby on rails. The most compelling thing about Rails is the ability to quickly build a full-featured application and run it. Rails's built-in integrated Prototype

Description: User resources include user data models and Web pages related to this model.1. The user data model is as follows:2. Using rails built-in scaffolding to generate user resources, execute the following command:$ rails Generate scaffold User name:string email:string #创建模型$ rails Destroy Scaffold User #销毁模型$ bundle EXEC Rake db:migrate #用Rake来迁移数据库, in or

1, Cloud development environment, CLOUD9 (https://ide.c9.io/). The development environment is pre-installed with most of the software required for rails development, including Ruby, RubyGems, and git, and requires you to install rails yourself.(1) Installing rails: $gem Install rai