ruby on rails web development tutorial

This chapter targets: Detail view, rails routing, Asset Pipeline, Sass1. Bootstrap is an open source web design framework developed by TwitterMockup is a Web concept diagram, often referred to as a "wireframe" in the web, used to show sketches of the final appearance of the applicationServo (P130)#link_to的第一个参数是链接文本, t

Cache and page display, this is the last part of the, I really did not think a serial actually spent a few hours. Tired... External links and tracking If you want to link and track external Web site resources, you can use the following helper method: Ruby Code External_link_to (Text,url) external_link_to (Image_tag (image), URL) These two ways to generate links (one is a text link, one is a graphi

This article will focus on how to build a ROR development environment under different operating systems and, at the end, detail how to install and configure the MySQL database under Windows operating systems. Construction of development environment under Windows system This article describes how to build a ROR development environment under Windows operating sys

It cannot be said that ROR has a huge impact on the web development mode, not only J2EE ProgramDevelopers are reflecting on why developing web programs using Java/J2EE is less efficient than ror. PHP programmers are also thinking about how to imitate and learn how to develop ror. Currently, PHP frameworks directly or indirectly affected by ror include: Ca

Before learning the processing of concurrent processing in rails, let's take a quick look at the concept of concurrent processing. In applications that have multiple processes that access the same database at the same time, this can happen because one process updates the rows in the database and makes the data held in another process obsolete. For example, A and B have extracted the same data from the database successively, and all made changes, then

At this point, the implementation of this shopping cart is complete. Now we can use Rdoc in ruby to generate documents for our program, just like dotnet, java, and python, rdoc can extract the comments before class and method declaration in our code to generate a document. For our depot program, run the rake appdoc command in the rails command line, After that, you can view the generated d

In the previous section, we demonstrated how to build a list of items, and this time we built a simple shopping cart based on the previous content. 1. First we want to create a table that holds customer shopping information: Database scripts: drop table if exists line_items; CREATE TABLE Line_items ( ID int not NULL auto_increment, product_id int not null, quantity int NOT null DEFAU Lt 0, unit_price decimal (10,2) NOT NULL, constraint fk_items_product foreign key (product_id) references Pro

The most frequently run query on a database is to return a conforming result set based on a specified condition, and the query may be to return all the names ' Dave's order, or all the titles on a blog with rails, in many other frameworks and programming languages, you need to create SQL to execute queries, and Active record takes advantage of the dynamic capabilities that the Ruby language contains. For e

Active support is a set of libraries provided with rails, active support extends some of the classes in Ruby, and this time we'll look at some of the most common features. 1. Extension of the number type The Fixnum class adds two methods: even and odd? The scaling method is also added: Puts 20.bytes #=> 20 Puts 20.kilobytes #=> 20480 Puts 20.megabytes #=> 20971520 Puts 20.gigabytes #=> 21474836480 P

1. The microblog model is as follows:2, the creation of Weibo resources, the command is as follows:$ rails Generate scaffold micropost content:text User_id:integer #生成微博资源$ bundle EXEC Rake db:migrate #执行迁移, update the database, use the new data model3, the content of micro-blog restrictions(1) Limit the length of WeiboIn the APP/MODELS/MICROPOST.RBclass Micropost activerecord::base validates:content, length:{maximum: }end(2) Weibo cannot be emptyclas

(Chapter I. Summary)First step: Build the project skeleton$ Rails _4.1.6_ New Toy_appStep Two: Modify GemfileStep three: Install the gem$ bundle Install--without productionFourth step: Add the app to the GIT version control system$ git init$ git add-a$ git commit-m "Initialize repository"Fifth step: Push the code to the remote repository#在GitHub网站创建新的repository$ git Remote add origin [email Protected]:lihuasun/toy_app$ Git push-u origin--allSixth step

I recently learned how to develop agile Web applications-applying rails for agile web development, version 2nd. When I implemented depot in chapter 1 Create the "goods maintenance" application, Class admincontroller Scaffold: Product End Then Depot> Ruby script/Server

Agile Web Development with Rails Translator (17) Chapter Nineth Task D: Settlement! So far, we have built a basic product management system, we implement a catalog and have a nice shopping cart. Now we need to get the buyer to actually buy something in the shopping cart. Before proceeding, let us implement the settlement function first. We are not going to go

Agile Web Development with Rails Translator (18) The only interesting thing here is the code associated with the selection list. We have already assumed that the list of valid payment options is a property of the order model-it will be an array of an array in the model file. The first element of each sub-array is made into a string that is displayed as an option

Agile Web Development with Rails translations (18) Here, the only interesting thing is the code associated with the select list. We have assumed that the list of valid payment options is an attribute of order model-it will be an array of an array in the model file. The first element of each sub array is a string that is displayed as an option selected, and the s

://www.bkjia.com/uploads/allimg/131023/09311131A-0.jpg "/> Once upon a time, Ruby was the best language ever, and all other languages were nothing compared. Now it's time to look back and it's a joke. Ruby's condition is far less dramatic than it was before. The track car (rails train) has actually slipped from orbit-and now the Ruby Camp has a

represents a fairly good object-oriented scripting language. It was born in 1993, and in recent years, with Ruby on Rails This "killer application" is rapidly growing in the field of Web development. Ruby was originally designed to absorb the essence of many other languages

Agile Web Development with Rails Translator (16) 8.5 cycle C3: Complete shopping cart Let's start processing the empty shopping cart connection on the shopping cart display. We know we have to implement a Empty_cart () method within the store "controller". Let's delegate its responsibilities to the cart class. April 17, 2006 Update def Empty_cart find_cart.emp

0 reply content :--- Update: Add a meteor react translation address. --- I feel that the difference will become very small after a framework is used. You don't have to talk about writing native. For example, PHP's Laravel and Rails are not very different. I am working on Laravel, but I have been familiar with Rail and I have written a little bit of Rails gadgets. After using it, I think it's almost the sa

Agile Web Development with Rails Translator (15) Organize your shopping cart Before we finish this work and show the customer, let's tidy up the shopping cart display page. Instead of simply dumping this product, let's add some formatting. At the same time, we can add some continuous shopping connections so that we don't have to press the back button only. Whe