Creating the application

Nov 6, 2010Download as PPT, PDF0 likes320 views

The document outlines the steps to create a Rails application called Depot that includes a Product model with title, description, image_url, and price attributes. It describes generating a scaffold for the Product model, running migrations to set up the database table, seeding the database with sample data, and pushing the application to Heroku. Key steps include generating the Rails application, adding the Product model, configuring the database, and deploying the application.

Creating a Rails application
• rvm --create use 1.8.7@rails3
• rails new depot
• cd depot
• echo ‘rvm use 1.8.7@rails3’ >> .rvmrc
• bundle install
• rails generate scaffold Product
title:string description:text
image_url:string price:decimal

Rails Migration
• db/migrate/2010031041958_create_products.
rb (yours may vary)

Run Your DB Migrations
• rake db:migrate
– Creates the products table
– Includes the fields we listed
• rake db:rollback
– Reverts last migration
– Drops the products table

Let’s try it
• rails server
• http://localhost:3000/products
– Create a new Product
– Verify product was created
– Reload /products to see list of products
– Try deleting a product

Change view files
• We want to change the number of lines
in the description field to 6
• app/views/products/_form.html.erb
– Change
<%= f.text_area :description %>
to
<%= f.text_area :description, :rows => 6 %>

Run tests
• rake test
– You should see 0 failures, 0 errors
– We’ll cover this more later

Add seed data to our DB
• We don’t want to have to create test
data manually all the time
• Rails offers db/seeds.rb which will
“seed” your database with test data
• curl -o db/seeds.rb
http://media.pragprog.com/titles/rails4/c
ode/depot_b/db/seeds.rb

Grab book images and layout
• http://media.pragprog.com/titles/rails4/code/d
epot_b/public/images/
– Download each image and put it in public/images/
• curl -o public/stylesheets/depot.css
http://media.pragprog.com/titles/rails4/code/d
epot_b/public/stylesheets/depot.css
• rm public/stylesheets/scaffold.css

Seed our database
• rake db:seed
– Runs content in db/seeds.rb
• Reload /products to see our new “seed”
books

Add stylesheet
• System wide layout file
• app/views/layouts/application.html.erb
• <%= stylesheet_link_tag :all %>

Push Depot to Heroku
• Add Heroku to Gemfile
• “bundle install”
• heroku create
• git push heroku master
• heroku rake db:migrate
• heroku rake db:seed
• heroku open (add /products to URL)

The document discusses testing and deploying a workflow service application using Windows Server AppFabric and provides the following steps: 1. Prepare a demo workflow service app in Visual Studio to add and return the sum of two input integers. 2. Publish the app to a local IIS website using web deploy and test it using the WCF test client. 3. View and configure the services and endpoints for the site using the AppFabric dashboard. 4. Update the project's web.config and add error handling to demonstrate the AppFabric logging capabilities.

Rails enginesIsmael G Marín C

Rails engines allow developers to build reusable applications that can be mounted within other Rails applications. Engines define their own controllers, models, and other code within a module namespace. This forces developers to isolate dependencies and make their code reusable. The rails plugin generator can be used to generate the skeleton for a Rails engine, including options for a full engine with its own MVC structure or a mountable engine that is namespaced. Popular engines include Devise for authentication and Spree for e-commerce functionality.

Ab testing work flowJainul Khan

A/B testing compares two versions of a web page by randomly showing visitors version A or B and measuring which performs better based on conversion rates. JavaScript and web services are used to determine which version a visitor sees and to save visit and conversion data which can then be viewed in a dashboard report showing metrics like visits, conversions, and conversion rates for each version over time periods like day, week, or month.

Reactive cocoaHSIEH CHING-FAN

ReactiveCocoa is a framework that uses functional reactive programming (FRP) to handle asynchronous data flows and events in a declarative way. It provides RACStream and RACSignal components to represent push-driven and pull-driven streams of data. RACSignal can be used to observe and chain together events like KVO observations. RACSequence represents pull-driven collections and adds higher-order functions. The document demonstrates using ReactiveCocoa and MVVM to build a reactive BMI calculator app, separating presentation logic from the view controller for easier testing and UI changes.

Seif_mike_gsoc_2014_cloudstackseif_100

PostgreSQL v9.4featuresSameer Kumar

Dynamics Talks: "Writing Spark Pipelines with Less Boilerplate Code" - Egor P...Grid Dynamics

Apache Spark is a general-purpose big data execution engine. You can work with different data sources with the same set of API in both batch and streaming mode. Such flexibility is great if you are experienced Spark developer solving a complicated data engineering problem, which might include ML or streaming. In Airbnb, 95% of all data pipelines are daily batch jobs, which read from Hive tables and write to Hive tables. For such jobs, you would like to trade some flexibility for more extensive functionality around writing to Hive or multiple days processing orchestration. Another advantage of reducing flexibility is creating "best practices", which can be followed by less experienced data engineers. In Airbnb, we've created a framework called "Sputnik," which tries to address these issues. In this talk, I'll show the typical boilerplate code, which Sputnik tries to reduce and concepts it introduces to simplify pipeline development.

Getting a Quick Start with Visualforce Mohammed Safwat Abu Kwaik

This document provides an overview of creating and working with Visualforce pages in Salesforce, including: - Creating a basic "Hello World" Visualforce page - Displaying field values using the Visualforce expression language - Using common Visualforce components like <apex:pageBlock> and <apex:detail> - Adding input fields, dependent picklists, and inline editing capabilities - Rendering Visualforce pages as PDFs - Building tables to display multiple records and enable editing - Implementing partial page refreshes using Ajax

Apache GobblinMike Frampton

This presentation gives an overview of the Apache Gobblin project. It explains Apache Gobblin in terms of it's architecture, data sources/sinks and it's work unit processing. Links for further information and connecting http://www.amazon.com/Michael-Frampton/e/B00NIQDOOM/ https://nz.linkedin.com/pub/mike-frampton/20/630/385 https://open-source-systems.blogspot.com/

Understanding Open Source Serverless Platforms: Design Considerations and Per...Johnny Li

Serverless computing is increasingly popular because of the promise of lower cost and the convenience it provides to users who do not need to focus on server management. This has resulted in the availability of a number of proprietary and open-source serverless solutions. We seek to understand how the performance of serverless computing depends on a number of design issues using several popular open-source serverless platforms. We identify the idiosyncrasies affecting performance (throughput and latency) for different open-source serverless platforms. Further, we observe that just having either resource-based (CPU and memory) or workload-based (request per second (RPS) or concurrent requests) auto-scaling is inadequate to address the needs of the serverless platforms.

Rails on RackBruno Andrade

Rack is a Ruby web server interface specification for building web applications. It defines an API for web servers to communicate with Ruby applications. Rack applications respond to the call method and return a three-element array containing the status, headers, and response. Rails uses Rack as its interface to communicate with web servers like WEBrick or Unicorn. Rack middleware can be added to Rails applications to add functionality like access logging or authentication. Common uses of Rack middleware include visitor counting, blocking access, and authentication with Devise.

Controls in asp.netbaabtra.com - No. 1 supplier of quality freshers

This document provides an overview of various controls in ASP.NET, including their properties and uses. It discusses standard controls like labels, text boxes, buttons, link buttons, hyperlinks, list boxes, check boxes, dropdown lists, radio buttons, images and image maps. It also covers validators, data controls like grid views, repeaters, data lists and details views, and data sources. The document is intended as a training guide for new ASP.NET developers.

Benchmarking Redis by itself and versus other NoSQL databasesItamar Haber

RichControl in Asp.netBhumivaghasiya

Operation Migration: Migrating Static Content into Cascade Server with our ne...hannonhill

How to Optimize GIS WorkflowsSafe Software

The document provides an overview of new transformers in FME that help optimize GIS workflows by simplifying attribute and data validation tasks. The AttributeManager allows consolidated handling of attribute tasks like creation, renaming, copying, and validation. The AttributeValidator performs validation tests on attributes and outputs validation messages. The FeatureWriter enables writing features in workflows to avoid chaining workspaces and support post-processing like notifications and automation.

RichFaces: rich:* component libraryMax Katz

1) This webinar reviewed JBoss RichFaces, a library of AJAX-enabled UI components for JavaServer Faces applications. 2) It covered basic concepts like partial view rendering and processing. It also demonstrated many of the rich UI components in the rich:* tag library. 3) Recent updates to RichFaces were highlighted, including new components in version 3.3.1 like rich:colorPicker and themes with predefined layouts. 4) Future plans for RichFaces 4.0 were discussed, which will integrate fully with JSF 2.0 and focus on consistency and performance.

Exciting Features for SQL Devs in SQL 2012Brij Mishra

SQL 2012 includes several new features for SQL developers including contained databases, columnstore indexes, sequence objects, data paging improvements, and new analytic functions like LEAD() and LAG(). It also enhances Transact-SQL with new conversion, date/time and logical functions and improves metadata discovery and error handling. Visual Studio integration is also improved with tighter management studio integration.

Discover/Register Everything in consulLeandro Totino Pereira

This document discusses using Consul for service discovery and configuration management. It describes how services can register with Consul to make their information available to other services and tools. Consul Template is used to generate configuration files for services like HAProxy, Bind9, and iptables from information stored in Consul. The document provides an introduction to service discovery benefits and Consul registration. It then demonstrates how Consul Template can be used to automatically generate configurations for HAProxy load balancing, DNS records in Bind9, and iptables rules based on services registered in Consul.

Functional Reactive Programming (CocoaHeads Bratislava)Michal Grman

Orchestrating workflows Apache Airflow on GCP & AWSDerrick Qin

Working in a cloud or on-premises environment, we all somehow move data from A to B on-demand or on schedule. It is essential to have a tool that can automate recurring workflows. This can be anything from an ETL(Extract, Transform, and Load) job for a regular analytics report all the way to automatically re-training a machine learning model. In this talk, we will introduce Apache Airflow and how it can help orchestrate your workflows. We will cover key concepts, features, and use cases of Apache Airflow, as well as how you can enjoy Apache Airflow on GCP and AWS by demo-ing a few practical workflows.

Cart creation-101217222728-phpapp01Jason Noble

This document summarizes steps for creating a shopping cart in a Rails application. It covers generating a Cart model and LineItem model with relationships, using Rails sessions to associate the cart with each user, adding public and private methods, callbacks and validations, adding a button to add items to the cart, and modifying views and controllers. Testing is done to ensure functionality. Homework includes enhancing the functionality by adding a click handler, session counter, and conditional display.

Ged compass bpl user 5911Nell Eckersley

The GED Compass website provides information and resources for prospective GED test takers in New York. It contains information about the GED test, practice tests, videos of past students, and a program locator to find free education programs. The site also has a seat reservation system to sign up for upcoming GED tests. It averages over 18,000 visits per year. Users can create a public profile to reserve seats, check their application status, and view a checklist of steps to complete the GED process. The site content is similar for New York City and State users, though the program locator and seat reservation search criteria vary by location.

Atlanta Pm Git 101Jason Noble

- Git is a distributed revision control system that keeps track of changes made to files over time through log messages and allows developers to easily share changes. - Git has a basic workflow of modifying files, staging files, and committing files to the local repository. - GitHub is a hosting service for Git repositories that allows collaboration on projects by multiple developers through pushing and pulling changes from a shared remote repository.

GIT, RVM, FIRST HEROKU APPPavel Tyk

This document provides a summary of key steps for setting up Git, RVM, Rails, and deploying a Rails app to Heroku. It includes installing and configuring Git, installing RVM and Ruby, generating a new Rails project, committing code to a Git repository, and pushing the Rails app to Heroku. The tips section suggests automating Ruby/gemset selection with .rvmrc, disabling documentation installation for faster gem installation, and customizing the command prompt.

Smarter cartJason Noble

This document discusses improvements made to an online shopping cart application in Rails. It covers adding a quantity column to line items with a default of 1, updating models and controllers to handle quantities, fixing duplicates in existing carts through a migration, using flash messages to notify users, and styling the cart view with CSS. Future tasks proposed are storing product price in line items, adding tests for unique and duplicate adds, improving flash messages, and enabling deletion or decrement of individual line items.

Dash of ajaxJason Noble

This document discusses adding Ajax functionality to a shopping cart application. It describes using partial templates to render cart items, modifying the "Add to Cart" button to use Ajax, highlighting updated items, and hiding the empty cart. Tests are written to verify the Ajax actions. Homework includes making other interactions like adding from the product image or removing items use Ajax as well.

Enterprise Heroku for JavaAyumu Aizawa

This document provides an overview of Heroku's Platform as a Service (PaaS) offering for professional application developers. Key points include: - Heroku allows developers to focus on code instead of servers by providing agile deployment, automatic scaling, and real-time logging and monitoring. - It supports a variety of programming languages and frameworks and allows running any type of application or process. - Heroku takes responsibility for application health while giving developers full control via APIs. It has over 2 million apps running on its erosion-resistant architecture. - The document highlights Heroku Enterprise for Java which provides a complete cloud solution for agile Java development with continuous delivery, integration with Bamboo, native Java

Davinci git brown_bagJason Noble

This document provides an overview of revision control systems like Git and GitHub. It discusses what revision control is, some early systems like SCCS and RCS, and then focuses on more modern distributed systems like SVN, Git, and Mercurial. For Git specifically, it covers features like non-linear development, easy branching and merging, auditing of history, and distributed development. It provides instructions for getting started with Git locally and also hosting projects on GitHub. Finally it advertises an additional hands-on training session for working through more examples.

Validation unit testingJason Noble

This document discusses validation and unit testing in Ruby on Rails. It provides examples of: 1. Validating that text fields are not empty, price is greater than $0.01, title is unique, and image URL format is valid on the Product model. 2. Running model unit tests to validate the product attributes and specific validations like price being positive. 3. Using test fixtures to populate the test database with sample data and test assumptions by ensuring tests fail when validations are removed.

More Related Content

What's hot (13)

Apache GobblinMike Frampton

Understanding Open Source Serverless Platforms: Design Considerations and Per...Johnny Li

Rails on RackBruno Andrade

Controls in asp.netbaabtra.com - No. 1 supplier of quality freshers

Benchmarking Redis by itself and versus other NoSQL databasesItamar Haber

RichControl in Asp.netBhumivaghasiya

Operation Migration: Migrating Static Content into Cascade Server with our ne...hannonhill

How to Optimize GIS WorkflowsSafe Software

RichFaces: rich:* component libraryMax Katz

Exciting Features for SQL Devs in SQL 2012Brij Mishra

Discover/Register Everything in consulLeandro Totino Pereira

Functional Reactive Programming (CocoaHeads Bratislava)Michal Grman

Orchestrating workflows Apache Airflow on GCP & AWSDerrick Qin

Apache GobblinMike Frampton

Understanding Open Source Serverless Platforms: Design Considerations and Per...Johnny Li

Rails on RackBruno Andrade

Controls in asp.netbaabtra.com - No. 1 supplier of quality freshers

Benchmarking Redis by itself and versus other NoSQL databasesItamar Haber

RichControl in Asp.netBhumivaghasiya

Operation Migration: Migrating Static Content into Cascade Server with our ne...hannonhill

How to Optimize GIS WorkflowsSafe Software

RichFaces: rich:* component libraryMax Katz

Exciting Features for SQL Devs in SQL 2012Brij Mishra

Discover/Register Everything in consulLeandro Totino Pereira

Functional Reactive Programming (CocoaHeads Bratislava)Michal Grman

Orchestrating workflows Apache Airflow on GCP & AWSDerrick Qin

Viewers also liked (10)

Cart creation-101217222728-phpapp01Jason Noble

Ged compass bpl user 5911Nell Eckersley

Atlanta Pm Git 101Jason Noble

GIT, RVM, FIRST HEROKU APPPavel Tyk

Smarter cartJason Noble

Dash of ajaxJason Noble

Enterprise Heroku for JavaAyumu Aizawa

Davinci git brown_bagJason Noble

Validation unit testingJason Noble

Google appsJason Noble

This document summarizes Google Apps, a free suite of business productivity applications from Google including Gmail, Google Calendar, Google Docs, and Google Sites. It provides an overview of the free and paid versions of Google Apps and guides users through the setup process, which involves signing up with a custom domain name and creating administrator and user accounts. Instructions are included for sharing calendars between users and embedding public calendars on websites.

Cart creation-101217222728-phpapp01Jason Noble

Ged compass bpl user 5911Nell Eckersley

Atlanta Pm Git 101Jason Noble

GIT, RVM, FIRST HEROKU APPPavel Tyk

Smarter cartJason Noble

Dash of ajaxJason Noble

Enterprise Heroku for JavaAyumu Aizawa

Davinci git brown_bagJason Noble

Validation unit testingJason Noble

Google appsJason Noble

Similar to Creating the application (20)

12 Introduction to RailsDeepak Hagadur Bheemaraju

Rails is a web application framework written in Ruby that makes programming web applications easier. The key principles of Rails are DRY (Don't Repeat Yourself), convention over configuration, and using RESTful architecture. Rails uses the MVC pattern with models representing data, views representing the user interface, and controllers handling requests and passing data between models and views. Creating a Rails application involves generating the app, setting up the database schema through migrations, and using validations and callbacks to control object state changes.

Ruby on Rails Kickstart 103 & 104Heng-Yi Wu

The document discusses Ruby on Rails scaffolds and the MVC pattern. It provides instructions for generating a scaffold using the rails generate scaffold command, adding and removing fields via database migrations, and modifying the associated controller and views. It also includes overviews of the MVC components in Rails - controllers handle requests and transfer data between models and views, models query and process data, and views build HTML responses.

Learning to code for startup mvp session 3Henry S

This document provides an overview of learning to code for a startup minimum viable product (MVP) using Ruby on Rails. It discusses setting up a development environment, using Git version control, the Ruby programming language basics, Rails models and object-relational mapping, authentication with Devise, Rails controllers and routing, and using scaffolding to build out a sample Mini Twitter app with Posts and Users models. The goal is to provide attendees with the necessary skills to build a basic MVP for a startup.

Jasig rubyon rails_zaMmer_

Ruby on Rails is an open-source web application framework that uses the Model-View-Controller pattern. It uses Ruby as its programming language. Rails provides conventions for building database-backed web applications, including generating scaffolding for basic CRUD operations. The document demonstrates how to generate a Rails application, scaffold a Bookmarks model, add validations and associations to Categories, and integrate Ajax functionality. Rails emphasizes conventions over configuration for directory structure and default actions.

Jasig rubyon rails_zaMmer_

Ruby on Rails is an open-source web application framework that uses the Model-View-Controller pattern. It uses Ruby as its programming language. Rails provides conventions for building database-backed web applications, including scaffolding that automatically generates the basic structure and files needed for a model. Rails emphasizes conventions over configuration, including naming conventions and default directory structures. The document provides an overview of Rails and demonstrates how to generate a sample bookmarks application using Rails, including generating models, views, controllers, and associations between models.

Rails - getting startedTrue North

Rails is a web application framework written in Ruby that uses the MVC architecture. It aims to reduce coding burden through its APIs and generators. Rails makes use of conventions like naming and placement of files to reduce configuration. The large Rails community provides support through documentation and libraries called gems that extend the framework's functionality. Key Rails concepts include routes, migrations, generators, object relationships and validations. Migrations allow managing the database schema through versions. Generators produce common code artifacts to speed development. Relationships define how objects connect to each other in the database. Validations ensure data integrity.

Introduction to RailsBlazing Cloud

RailsSHC

API-Testing-SOAPUI-1.pptxamarnathdeo

This document provides an overview of API testing and web services protocols. It discusses XML, SOAP, REST, and introduces the tool SoapUI for testing web services. Key points include: 1. XML is used to transport and store data on the web. It has elements, attributes, and syntax rules. XML Namespaces avoid element name conflicts. 2. SOAP is a protocol for accessing web services. It uses XML, includes envelope, header and body elements. WSDL describes SOAP web services operations. 3. REST services use HTTP to manipulate resources via operations like GET, PUT, POST and DELETE. It can output JSON, XML and is language/platform independent. 4.

Supa fast Ruby + RailsJean-Baptiste Feldis

This document provides a fast-paced introduction to Ruby, Rails, and additional technologies. It begins with an overview of Ruby basics, syntax, and uses beyond scripts. It then covers Rails fundamentals including MVC architecture, scaffolding, models, views, controllers, and routes. Additional topics discussed include gems, Git, and deploying to Heroku. The document concludes by outlining a sample project to build a marketplace for buying and selling robot spare parts.

Ruby on Rails introduction Tran Hung

Ruby is an object-oriented programming language created in 1993, while Rails is a web application framework built using Ruby. The document provides an overview of Ruby and Rails, including what Rails is and its key advantages such as convention over configuration, don't repeat yourself (DRY) principles, and object-relational mapping (ORM). It also demonstrates creating a sample Rails application and using the Spree e-commerce gem.

Ruby on RailsSadakathullah Appa College

This document provides an introduction and overview of Ruby on Rails. It discusses that Rails is a full-stack web application framework written in Ruby that follows conventions like DRY and MVC. It allows developers to build database-backed web applications more quickly compared to other frameworks. The document then covers key Rails concepts like migrations, Active Record, associations, validations, and the query interface. It provides examples of generating models and controllers and implementing RESTful actions to perform CRUD operations.

An Intense Overview of the React EcosystemRami Sayar

React has been named the front-end library to learn in 2016 however few people talk about the React without mentioning Flux (or Redux or React Native or Relay). In this talk, we will explore the ecosystem of tools and libraries that surround React. We will look at the various Flux implementations (including a short explanation of Flux) like Redux, at react-router, at some of the reactive database or reactive API libraries and finally at everyday tools and techniques that make the React developer happy. By the end of this talk, you will have a greater grasp of the ecosystem and leave with new tools in your developer arsenal.

Aspose pdfJim Jones

This document provides an overview of Ruby on Rails, a web application framework written in Ruby. It discusses what Ruby and Rails are, the key strengths of Rails like productivity and convention over configuration. It then demonstrates how to build a basic Rails application, including generating models and controllers, scaffolding, and adding relationships between models. The document aims to introduce developers to Ruby on Rails and demonstrate its capabilities.

Ruby on Rails + AngularJS + Twitter BootstrapMarcio Marinho

This document provides an overview of setting up a Ruby on Rails application that integrates AngularJS and Twitter Bootstrap. It discusses why these technologies are used together and how to set them up, including installing necessary gems, modifying files, and adding AngularJS controllers. Code examples are provided to demonstrate basic CRUD functionality using Rails and AngularJS. The document concludes by describing the presenters' consulting company and providing contact information.

Rails Request & MiddlewaresSantosh Wadghule

This document summarizes the Rails request lifecycle and describes various middlewares used in Rails. It begins by explaining what a request is and how it travels from the browser to the Rails application. It then discusses the roles of the web server and app server. The bulk of the document describes each middleware in the Rails stack, from Rack middlewares to ActionDispatch middlewares to ActiveRecord middlewares. It explains what each middleware does to filter requests and responses. Finally, it outlines how the request travels through the middleware stack to the routes, controller, and back out again to complete the response sent to the client.

Rails request & middlewaresSantosh Wadghule

Rail3 intro 29th_sep_surendranSPRITLE SOFTWARE PRIVATE LIMIT ED

Intro to Rails Give Camp AtlantaJason Noble

This document provides an introduction and overview of Ruby on Rails, including: its history and initial release in 2004; the Model-View-Controller architecture and included components; installing and setting up a basic Rails application; scaffolding a product catalog with CRUD functionality; adding validation, testing, and pushing the application to Heroku for deployment. It then demonstrates expanding the application by adding a shopping cart and checkout functionality using additional scaffolds, models, and controllers.

Ruby on Rails - IntroductionVagmi Mudumbai

Turbocharge your web development with Rails Vagmi Mudumbai presented an overview of Ruby on Rails web development. The presentation covered installing Ruby and Rails, the MVC framework, generating models and migrations, querying the database, controllers and routes, views and forms. Attendees learned the basics of building a Rails application including setting up models, controllers and views to create, read, update and delete data through a RESTful interface.

12 Introduction to RailsDeepak Hagadur Bheemaraju

Ruby on Rails Kickstart 103 & 104Heng-Yi Wu

Learning to code for startup mvp session 3Henry S

Jasig rubyon rails_zaMmer_

Rails - getting startedTrue North

Introduction to RailsBlazing Cloud

RailsSHC

API-Testing-SOAPUI-1.pptxamarnathdeo

Supa fast Ruby + RailsJean-Baptiste Feldis

Ruby on Rails introduction Tran Hung

Ruby on RailsSadakathullah Appa College

An Intense Overview of the React EcosystemRami Sayar

Aspose pdfJim Jones

Ruby on Rails + AngularJS + Twitter BootstrapMarcio Marinho

Rails Request & MiddlewaresSantosh Wadghule

Rails request & middlewaresSantosh Wadghule

Rail3 intro 29th_sep_surendranSPRITLE SOFTWARE PRIVATE LIMIT ED

Intro to Rails Give Camp AtlantaJason Noble

Ruby on Rails - IntroductionVagmi Mudumbai

More from Jason Noble (9)

Intro to TDD and BDDJason Noble

Rspec 101Jason Noble

RSpec 101 provides an overview of RSpec and its main concepts: 1. describe() and it() are used to define example groups and examples (tests) within those groups. describe blocks can be nested and context() is an alias for describe(). 2. before(), after(), around() hooks allow setting up and tearing down test environment/state. before(:each) runs before each example while before(:all) runs once for the group. 3. expect() is used to set expectations for what should happen rather than assertions for what will. Matchers like .equal(), .include() check expectations. 4. Helper methods, shared examples, and mocks can be used to DRY up

jQuery IntroJason Noble

The document provides an overview of jQuery, a popular JavaScript library, including its history and benefits such as easy DOM manipulation, AJAX capabilities, and cross-browser compatibility. It then demonstrates several jQuery functions and selectors for modifying HTML elements, handling events, and making AJAX requests to update content without page refreshes. Examples are given for selecting elements, updating styles, handling events like clicks, and validating form input with plugins.

Catalog displayJason Noble

The document discusses setting up a basic online store application in Rails. It covers generating a Store controller, routing requests to the store index action, displaying a list of products from the database, adding styles with CSS, using Rails helpers like number_to_currency to format prices, and writing functional tests for the controller. Homework includes adding a date to the sidebar, experimenting with number formatting options, and writing tests for the products controller.

CapistranoJason Noble

This document provides instructions for deploying a Rails application using Capistrano. It includes steps to set up Capistrano, configure the deploy.rb file, generate SSH keys, add the deploy key to GitHub, run Capistrano tasks to deploy the application, and make subsequent deploys when code changes. The application is deployed to a server at 192.168.255.54 running Mongrel and uses Git for version control.

Regex IntroJason Noble

Git101Jason Noble

Git AtlrugJason Noble

Git102Jason Noble

Intro to TDD and BDDJason Noble

Rspec 101Jason Noble

jQuery IntroJason Noble

Catalog displayJason Noble

CapistranoJason Noble

Regex IntroJason Noble

Git101Jason Noble

Git AtlrugJason Noble

Git102Jason Noble

Recently uploaded (20)

Splunk Security Update | Public Sector Summit Germany 2025Splunk

Into The Box Conference Keynote Day 1 (ITB2025)Ortus Solutions, Corp

What is Model Context Protocol(MCP) - The new technology for communication bw...Vishnu Singh Chundawat

The MCP (Model Context Protocol) is a framework designed to manage context and interaction within complex systems. This SlideShare presentation will provide a detailed overview of the MCP Model, its applications, and how it plays a crucial role in improving communication and decision-making in distributed systems. We will explore the key concepts behind the protocol, including the importance of context, data management, and how this model enhances system adaptability and responsiveness. Ideal for software developers, system architects, and IT professionals, this presentation will offer valuable insights into how the MCP Model can streamline workflows, improve efficiency, and create more intuitive systems for a wide range of use cases.

Noah Loul Shares 5 Steps to Implement AI Agents for Maximum Business Efficien...Noah Loul

Artificial intelligence is changing how businesses operate. Companies are using AI agents to automate tasks, reduce time spent on repetitive work, and focus more on high-value activities. Noah Loul, an AI strategist and entrepreneur, has helped dozens of companies streamline their operations using smart automation. He believes AI agents aren't just tools—they're workers that take on repeatable tasks so your human team can focus on what matters. If you want to reduce time waste and increase output, AI agents are the next move.

Procurement Insights Cost To Value Guide.pptxJon Hansen

Enhancing ICU Intelligence: How Our Functional Testing Enabled a Healthcare I...Impelsys Inc.

Cyber Awareness overview for 2025 month of securityriccardosl1

Designing Low-Latency Systems with Rust and ScyllaDB: An Architectural Deep DiveScyllaDB

Want to learn practical tips for designing systems that can scale efficiently without compromising speed? Join us for a workshop where we’ll address these challenges head-on and explore how to architect low-latency systems using Rust. During this free interactive workshop oriented for developers, engineers, and architects, we’ll cover how Rust’s unique language features and the Tokio async runtime enable high-performance application development. As you explore key principles of designing low-latency systems with Rust, you will learn how to: - Create and compile a real-world app with Rust - Connect the application to ScyllaDB (NoSQL data store) - Negotiate tradeoffs related to data modeling and querying - Manage and monitor the database for consistently low latencies

AI Changes Everything – Talk at Cardiff Metropolitan University, 29th April 2...Alan Dix

Talk at the final event of Data Fusion Dynamics: A Collaborative UK-Saudi Initiative in Cybersecurity and Artificial Intelligence funded by the British Council UK-Saudi Challenge Fund 2024, Cardiff Metropolitan University, 29th April 2025 https://alandix.com/academic/talks/CMet2025-AI-Changes-Everything/ Is AI just another technology, or does it fundamentally change the way we live and think? Every technology has a direct impact with micro-ethical consequences, some good, some bad. However more profound are the ways in which some technologies reshape the very fabric of society with macro-ethical impacts. The invention of the stirrup revolutionised mounted combat, but as a side effect gave rise to the feudal system, which still shapes politics today. The internal combustion engine offers personal freedom and creates pollution, but has also transformed the nature of urban planning and international trade. When we look at AI the micro-ethical issues, such as bias, are most obvious, but the macro-ethical challenges may be greater. At a micro-ethical level AI has the potential to deepen social, ethnic and gender bias, issues I have warned about since the early 1990s! It is also being used increasingly on the battlefield. However, it also offers amazing opportunities in health and educations, as the recent Nobel prizes for the developers of AlphaFold illustrate. More radically, the need to encode ethics acts as a mirror to surface essential ethical problems and conflicts. At the macro-ethical level, by the early 2000s digital technology had already begun to undermine sovereignty (e.g. gambling), market economics (through network effects and emergent monopolies), and the very meaning of money. Modern AI is the child of big data, big computation and ultimately big business, intensifying the inherent tendency of digital technology to concentrate power. AI is already unravelling the fundamentals of the social, political and economic world around us, but this is a world that needs radical reimagining to overcome the global environmental and human challenges that confront us. Our challenge is whether to let the threads fall as they may, or to use them to weave a better future.

Drupalcamp Finland – Measuring Front-end Energy ConsumptionExove

Complete Guide to Advanced Logistics Management Software in Riyadh.pdfSoftware Company

Explore the benefits and features of advanced logistics management software for businesses in Riyadh. This guide delves into the latest technologies, from real-time tracking and route optimization to warehouse management and inventory control, helping businesses streamline their logistics operations and reduce costs. Learn how implementing the right software solution can enhance efficiency, improve customer satisfaction, and provide a competitive edge in the growing logistics sector of Riyadh.

Semantic Cultivators : The Critical Future Role to Enable AIartmondano

Heap, Types of Heap, Insertion and DeletionJaydeep Kale

Manifest Pre-Seed Update | A Humanoid OEM Deeptech In Francechb3

AI EngineHost Review: Revolutionary USA Datacenter-Based Hosting with NVIDIA ...SOFTTECHHUB

I started my online journey with several hosting services before stumbling upon Ai EngineHost. At first, the idea of paying one fee and getting lifetime access seemed too good to pass up. The platform is built on reliable US-based servers, ensuring your projects run at high speeds and remain safe. Let me take you step by step through its benefits and features as I explain why this hosting solution is a perfect fit for digital entrepreneurs.

AI and Data Privacy in 2025: Global TrendsInData Labs

In this infographic, we explore how businesses can implement effective governance frameworks to address AI data privacy. Understanding it is crucial for developing effective strategies that ensure compliance, safeguard customer trust, and leverage AI responsibly. Equip yourself with insights that can drive informed decision-making and position your organization for success in the future of data privacy. This infographic contains: -AI and data privacy: Key findings -Statistics on AI data privacy in the today’s world -Tips on how to overcome data privacy challenges -Benefits of AI data security investments. Keep up-to-date on how AI is reshaping privacy standards and what this entails for both individuals and organizations.

How analogue intelligence complements AIPaul Rowe

Artificial Intelligence is providing benefits in many areas of work within the heritage sector, from image analysis, to ideas generation, and new research tools. However, it is more critical than ever for people, with analogue intelligence, to ensure the integrity and ethical use of AI. Including real people can improve the use of AI by identifying potential biases, cross-checking results, refining workflows, and providing contextual relevance to AI-driven results. News about the impact of AI often paints a rosy picture. In practice, there are many potential pitfalls. This presentation discusses these issues and looks at the role of analogue intelligence and analogue interfaces in providing the best results to our audiences. How do we deal with factually incorrect results? How do we get content generated that better reflects the diversity of our communities? What roles are there for physical, in-person experiences in the digital world?

Greenhouse_Monitoring_Presentation.pptx.hpbmnnxrvb

Technology Trends in 2025: AI and Big Data AnalyticsInData Labs

At InData Labs, we have been keeping an ear to the ground, looking out for AI-enabled digital transformation trends coming our way in 2025. Our report will provide a look into the technology landscape of the future, including: -Artificial Intelligence Market Overview -Strategies for AI Adoption in 2025 -Anticipated drivers of AI adoption and transformative technologies -Benefits of AI and Big data for your business -Tips on how to prepare your business for innovation -AI and data privacy: Strategies for securing data privacy in AI models, etc. Download your free copy nowand implement the key findings to improve your business.

ThousandEyes Partner Innovation Updates for May 2025ThousandEyes

Splunk Security Update | Public Sector Summit Germany 2025Splunk

Into The Box Conference Keynote Day 1 (ITB2025)Ortus Solutions, Corp

What is Model Context Protocol(MCP) - The new technology for communication bw...Vishnu Singh Chundawat

Noah Loul Shares 5 Steps to Implement AI Agents for Maximum Business Efficien...Noah Loul

Procurement Insights Cost To Value Guide.pptxJon Hansen

Enhancing ICU Intelligence: How Our Functional Testing Enabled a Healthcare I...Impelsys Inc.

Cyber Awareness overview for 2025 month of securityriccardosl1

Designing Low-Latency Systems with Rust and ScyllaDB: An Architectural Deep DiveScyllaDB

AI Changes Everything – Talk at Cardiff Metropolitan University, 29th April 2...Alan Dix

Drupalcamp Finland – Measuring Front-end Energy ConsumptionExove

Complete Guide to Advanced Logistics Management Software in Riyadh.pdfSoftware Company

Semantic Cultivators : The Critical Future Role to Enable AIartmondano

Heap, Types of Heap, Insertion and DeletionJaydeep Kale

Manifest Pre-Seed Update | A Humanoid OEM Deeptech In Francechb3

AI EngineHost Review: Revolutionary USA Datacenter-Based Hosting with NVIDIA ...SOFTTECHHUB

AI and Data Privacy in 2025: Global TrendsInData Labs

How analogue intelligence complements AIPaul Rowe

Greenhouse_Monitoring_Presentation.pptx.hpbmnnxrvb

Technology Trends in 2025: AI and Big Data AnalyticsInData Labs

ThousandEyes Partner Innovation Updates for May 2025ThousandEyes

Creating the application

1. Creating the Application

2. Creating a Rails application • rvm --create use 1.8.7@rails3 • rails new depot • cd depot • echo ‘rvm use 1.8.7@rails3’ >> .rvmrc • bundle install • rails generate scaffold Product title:string description:text image_url:string price:decimal

3. Rails Migration • db/migrate/2010031041958_create_products. rb (yours may vary)

4. Run Your DB Migrations • rake db:migrate – Creates the products table – Includes the fields we listed • rake db:rollback – Reverts last migration – Drops the products table

5. Let’s try it • rails server • http://localhost:3000/products – Create a new Product – Verify product was created – Reload /products to see list of products – Try deleting a product

6. Change view files • We want to change the number of lines in the description field to 6 • app/views/products/_form.html.erb – Change <%= f.text_area :description %> to <%= f.text_area :description, :rows => 6 %>

7. Run tests • rake test – You should see 0 failures, 0 errors – We’ll cover this more later

8. Add seed data to our DB • We don’t want to have to create test data manually all the time • Rails offers db/seeds.rb which will “seed” your database with test data • curl -o db/seeds.rb http://media.pragprog.com/titles/rails4/c ode/depot_b/db/seeds.rb

9. Grab book images and layout • http://media.pragprog.com/titles/rails4/code/d epot_b/public/images/ – Download each image and put it in public/images/ • curl -o public/stylesheets/depot.css http://media.pragprog.com/titles/rails4/code/d epot_b/public/stylesheets/depot.css • rm public/stylesheets/scaffold.css

10. Seed our database • rake db:seed – Runs content in db/seeds.rb • Reload /products to see our new “seed” books

11. Add stylesheet • System wide layout file • app/views/layouts/application.html.erb • <%= stylesheet_link_tag :all %>

12. app/views/products/index.html.erb

13. Push Depot to Heroku • Add Heroku to Gemfile • “bundle install” • heroku create • git push heroku master • heroku rake db:migrate • heroku rake db:seed • heroku open (add /products to URL)

Creating the application

Recommended

More Related Content

What's hot (13)

Viewers also liked (10)

Similar to Creating the application (20)

More from Jason Noble (9)

Recently uploaded (20)

Creating the application