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has a kind of thing called GFW, full name is great Firewall, commonly known as "the Wall". (More on Wikipedia), simply speaking, it leads meThere are no direct access to many websites and services. This wall has seriously affected everyone's life, especially it people, because there are countless good sites, good service has been blocked. And for those who are learning Ruby and Rails, the wall is more dire
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$
is better to build, deploy, or publish applications using Ruby scripts than Nant.Rake is a standard build tool used in Ruby on Rails development. Rake uses the ruby syntax, which means you need to use Ruby to compile your build script when building and deploying different a
Here simply add a few validations, non-empty, minimum length, uniqueModifying a modelModify the App/models/post.rb file as follows:Class Post At this time to run the service, modify/New model, when nothing is filled, can not be submitted, nor error.What's the reason?Because you didn't show the error message.Modify viewsModify the App/views/posts/new.html.erb file as follows:That is, addFor App/views/posts/edit.html.erb.Running the serviceRails S-b 192.168.xxx.xxx-p 3000, add a record, do not fil
everything is set up, it is time to install Rails. To start, open terminal and type in: gem install rails This process may take a while, be patient with it. Once it finishes you will have Ruby on Rails installed on your droplet. -- Source to network. For Ruby on
Introduction: Ruby on Rails is just one aspect of making Ruby very powerful, just as EJB is part of the Java Enterprise platform. Andrew Glover reveals what Java developers can do with Ruby. Before I begin this article, I need to clarify a few things. First, it's not an article about
1995. So although Ruby is a mature language, it is not as popular as other languages. This makes the Ruby programming language camp not as powerful as the Java, PHP, and Perl camps. Therefore, you will find that there are few frameworks, libraries, books, websites, blogs, and other resources dedicated to this language. After David Heinemeier Hanson launched the
counterintuitive, this technique is similar to how it works. However, it is easy to use this technique to do too much nesting, especially if the architecture is complex. Simple use cases are fine, as shown in Listing 9, but cumbersome nesting can also be problematic. In some cases, too much loading of Ruby objects may be slower than dealing with n+1 problems-especially when each object is not being taken over by the entire tree. In this case, other s
Brief introduction Today's applications need to interoperate not only with browser-based clients, but with other applications as well. For interoperability, Web applications typically provide a Web service API. The Web services API provides remote access to applications through a network, such as the Internet. Until recently, the Web services API had also been integrated with heavy, complex, SOAP-based Web services, which had little merit and would take a long time to implement. The
and access the methods and variables in your Rail application. This tutorial explains how to configure and use RJB in a Rails application. Goal In this tutorial, you will learn how to: Download, compile, and install RJB Set up RJB to access the shared Java library Load Legacy Java code into a Rails application and acces
non-lookup SQL statements ActiveRecord::Base.connection.execute "ALTER TABLE some_table CHANGE COLUMN..." Most mode operations, such as adding or deleting columns, can be completed using the built-in Rails method. However, if necessary, you can also use the ability to execute arbitrary SQL code. Conclusion Like all the frameworks, Ruby on Rails may also suffer
effort to modify the Rails environment. Again, I can't find a reason not to use the organization that Rails provides, and in most cases it's "fits Your Brain" (as the proponents of Ruby like to say). For example, if you are designing a framework from scratch (at least if you think in Ruby mode), then these directory n
-related work. Memory problems are the primary cause of Slow Ruby applications. The 80-20 rule for Rails performance optimization is like this: the 80% increase is due to the memory optimization, and the remaining 20% is another factor. Why is memory consumption so important? Because the more memory you allocate, the more work Ruby GC (Ruby's garbage collection m
reduced to 2, and the code was optimized. The Rails cache is also easy to implement. The block cache in Rails 4 is pretty good. The Rails documentation is an excellent source of information about caching. However, caching does not become the ultimate solution to performance problems compared with capacity expansion. If your code doesn't work as expected, you'll
Several solutions to improve Ruby on Rails performance: rubyrails Introduction The Ruby On Rails framework has received wide attention since it was proposed. Under the guidance of ideas such as "do not repeat yourself" and "convention is better than configuration, rails brin
Brief introduction The Ruby on Rails framework has been widely watched since its inception and, guided by ideas like "Don't repeat Yourself" and "contract is superior to configuration", rails gives Web developers a very high level of development efficiency. ActiveRecord's flexibility allows you to use a very easy-to-use Hibernate without cumbersome configuration
One: Website and its blog: 1.http://ihower.tw/training/ The Ruby on Rails Learning Network is a professional website that communicates to learn about the knowledge of Ruby on Rails. 2.http://www.javaeye.com/wiki/rails_weeklyRails Weekly One question 3.http://www.5iror.
Using Ruby On Rails on Bluehost: This is intended to be a brief introduction to developing ruby on rails applications on a bluehost account. at the bottom of this article you will find a number of resources to help you learn more
technical resource center ", you can quickly find technical reference resources that can help you complete Ajax-related application development. A description of Rails So what is Rails? Rails is a Web application platform built on the Ruby programming language.
Ruby and rails Knowledge, part of the answer,Ruby Meta-programming did not answer, and eventually did not want me. The reasons for the response are:1, the actual experience of the project is insufficient. This is a mishap, because the project has limitations, will only involve a very narrow knowledge, the use of the Gem is very few. 2, English listening and spe