The params hash contains the following values:

<% params.each do |key, value| %>

<%= key %>: <%= value %>

<% end %> CS 142 Lecture Notes: Rails Controllers and Views"> Rails Parameters

The params hash contains the following values:

<% params.each do |key, value| %>

<%= key %>: <%= value %>

<% end %> CS 142 Lecture Notes: Rails Controllers and Views">

Presentation is loading. Please wait.

Presentation is loading. Please wait.

CS 142 Lecture Notes: Rails Controllers and Views

Published byInge Kusnadi Modified over 5 years ago

Similar presentations

Presentation on theme: "CS 142 Lecture Notes: Rails Controllers and Views"— Presentation transcript:

1 CS 142 Lecture Notes: Rails Controllers and Views
Simple Rails Template <?xml version="1.0" encoding="utf-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" " <html xmlns=" xml:lang="en" lang="en"> <head> <title>Hello, User</title> </head> <body> <p> This page was fetched at <%= Time.now() %> </p> </body> </html> CS 142 Lecture Notes: Rails Controllers and Views

2 Control Structures in Templates
?xml version="1.0" encoding="utf-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" " <html xmlns=" xml:lang="en" lang="en"> <head> <title>Rails Parameters</title> </head> <body> <p> The <code>params</code> hash contains the following values: </p> <% params.each do |key, value| %> <p><%= key %>: <%= value %></p> <% end %> </body> </html> CS 142 Lecture Notes: Rails Controllers and Views

3 Control Structures, cont’d
Template: ... <% params.each do |key, value| %> <p><%= key %>: <%= value %></p> <% end %> HTML: ... <p>x: 44</p> <p>y: 92</p> <p>action: showParams</p> <p>controller: rails_intro</p> CS 142 Lecture Notes: Rails Controllers and Views

4 Controller: Compute Primes
class RailsIntroController < ApplicationController def show_primes if params[:count] != nil then count = params[:count].to_i() else count = 10 end @primes = [] candidate = 2 < count is_prime = true @primes.each do |prime| if (candidate % prime) == 0 then is_prime = false break if is_prime then @primes << candidate candidate += 1 Query value determines # primes to compute Fill array with prime numbers CS 142 Lecture Notes: Rails Controllers and Views

5 Template to Display Primes
<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE ...> <html ...> <head> %> Prime Numbers</title> <%= stylesheet_link_tag 'main' %> </head> <body> <p> The first %> prime numbers are: </p> <table class="oddEven" cellspacing="0"> <tr class="header"><td>Prime Numbers</td></tr> do |prime| %> <tr class="<%= cycle('odd', 'even') %>"> <td><%= prime %></td> </tr> <% end %> </table> </body> </html> CS 142 Lecture Notes: Rails Controllers and Views

6 CS 142 Lecture Notes: Rails Controllers and Views
Directory Structure app controllers rails_intro_controller.rb student_controller.rb views rails_intro hello.html.erb show_params.html.erb show_primes.html.erb student models assets javascripts stylesheets main.css db migrate public images CS 142 Lecture Notes: Rails Controllers and Views

7 Layouts app/views/layouts/application.html.erb:
<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" " <html xmlns=" xml:lang="en" lang="en"> <head> %></title> </head> <body> <%= yield %> </body> </html> app/views/rails_intro/hello.html.erb: = "Hello, user" %> <p> This page was fetched at <%= Time.now() %> </p> CS 142 Lecture Notes: Rails Controllers and Views

8 CS 140 Lecture Notes: File Systems

Download ppt "CS 142 Lecture Notes: Rails Controllers and Views"

Similar presentations

CS 142 Lecture Notes: Rails Controllers and ViewsSlide 1 Simple Rails Template

CS 142 Lecture Notes: Rails Controllers and ViewsSlide 1 Simple Rails Template
CS 142 Lecture Notes: HTMLSlide 1 Introduction This article is a review of the book Dietary Preferences of Penguins, by Alice Jones and Bill Smith. Jones.

CS 142 Lecture Notes: HTMLSlide 1 Introduction This article is a review of the book Dietary Preferences of Penguins, by Alice Jones and Bill Smith. Jones.
XHTML II DIGITAL MEDIA: COMMUNICATION AND DESIGN F2007.

XHTML II DIGITAL MEDIA: COMMUNICATION AND DESIGN F2007.
CS 142 Lecture Notes: HTMLSlide 1 Introduction There are several good reasons for taking CS142: Web Applications: ● You will learn a variety of interesting.

CS 142 Lecture Notes: HTMLSlide 1 Introduction There are several good reasons for taking CS142: Web Applications: ● You will learn a variety of interesting.
F2007 06.02.2007 DIGITAL MEDIA: COMMUNICATION AND DESIGN INTRODUCTION TO XML AND XHTML.

F DIGITAL MEDIA: COMMUNICATION AND DESIGN INTRODUCTION TO XML AND XHTML.
XHTML and Forms Review – Page 1CSCI 2910 – Client/Server-Side Programming CSCI 2910 Client/Server-Side Programming Topic: Review XHTML and Forms.

XHTML and Forms Review – Page 1CSCI 2910 – Client/Server-Side Programming CSCI 2910 Client/Server-Side Programming Topic: Review XHTML and Forms.
Using Html Basics, Text and Links. Objectives  Develop a web page using HTML codes according to specifications and verify that it works prior to submitting.

Using Html Basics, Text and Links. Objectives  Develop a web page using HTML codes according to specifications and verify that it works prior to submitting.
Chapter 15 © 2009 by Addison Wesley Longman, Inc. 1 15.1 Overview of Rails - Rails is a development framework for Web-based applications - Rails is written.

Chapter 15 © 2009 by Addison Wesley Longman, Inc Overview of Rails - Rails is a development framework for Web-based applications - Rails is written.
XHTML1-1 Extensible HyperText Markup Language (XHTML) Part 2 Xingquan (Hill) Zhu

XHTML1-1 Extensible HyperText Markup Language (XHTML) Part 2 Xingquan (Hill) Zhu
Images and Tables ables.asp.

Images and Tables ables.asp.
Chapter 15 © 2013 by Pearson. 1 15.1 Overview of Rails - Rails is a development framework for Web-based applications - Based on MVC architecture for applications.

Chapter 15 © 2013 by Pearson Overview of Rails - Rails is a development framework for Web-based applications - Based on MVC architecture for applications.
CIS 375—Web App Dev II JavaScript I. 2 Introduction to DTD JavaScript is a scripting language developed by ________. A scripting language is a lightweight.

CIS 375—Web App Dev II JavaScript I. 2 Introduction to DTD JavaScript is a scripting language developed by ________. A scripting language is a lightweight.
The Controller Carol Wolf Computer Science. Rails generate commands  Using the generate command, you can create a number of useful objects.  Rails:

The Controller Carol Wolf Computer Science. Rails generate commands  Using the generate command, you can create a number of useful objects.  Rails:
CIS 228 The Internet 9/20/11 XHTML 1.0. “Quirks” Mode Today, all browsers support standards Compliant pages are displayed similarly There are multiple.

CIS 228 The Internet 9/20/11 XHTML 1.0. “Quirks” Mode Today, all browsers support standards Compliant pages are displayed similarly There are multiple.
CS 160 and CMPE/SE 131 Software Engineering February 11 Class Meeting Department of Computer Science Department of Computer Engineering San José State.

CS 160 and CMPE/SE 131 Software Engineering February 11 Class Meeting Department of Computer Science Department of Computer Engineering San José State.
Ruby on Rails. Web Framework for Ruby Designed to make it easier to develop, deploy, and maintain web applications Design with Model-View-Controller –almost.

Ruby on Rails. Web Framework for Ruby Designed to make it easier to develop, deploy, and maintain web applications Design with Model-View-Controller –almost.
© 2016 Pearson Education, Inc., Hoboken, NJ. All rights reserved.

© 2016 Pearson Education, Inc., Hoboken, NJ. All rights reserved.
School of Business Administration HTML, Expression Web, WinSCP, &

School of Business Administration HTML, Expression Web, WinSCP, &
What is XHTML? XHTML stands for Extensible Hypertext Markup Language

What is XHTML? XHTML stands for Extensible Hypertext Markup Language
CSE 102 Introduction to Web Design and Programming

CSE 102 Introduction to Web Design and Programming

Similar presentations

Ads by Google