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Ruby On Rails

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Gautam Rege
Gautam Rege

Ruby On Rails basics

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Ruby On Rails Gautam Rege Josh Software Pvt. Ltd.
Speaker Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Part – 1 Ruby on Rails Introduction
History of Ruby ,[object Object],[object Object],[object Object],[object Object]
Ruby Vs Python ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Ruby Vs Perl ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Ruby Vs Perl contd.. ,[object Object],[object Object],[object Object]
Features of Ruby ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
What do I choose anyway?? ,[object Object],[object Object],[object Object]
Overall Comparison Rails Pylons cgi/perl Web-frameworks    Plug-ins / auto-installation    Object Oriented Nature  Weak References (leaks)    Garbage Collection    Loose Data Typing    Data Types: Arrays, Hash Ruby Python Perl Features
Web Technologies ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
J2EE, .NET Web Development ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
CGI / Perl & PHP ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Pylons ,[object Object],[object Object],[object Object],[object Object]
Ruby on Rails ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Ruby On Rails contd.. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Rails in the Real World ,[object Object],[object Object],[object Object],[object Object],[object Object]
Part 2 – Rails Architecture
Terminologies ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Model – View – Controller
Model - Overview ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Controller – Overview ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
View – Overview ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
MVC in Rails
Routing in Rails ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
A word about RESTfull Rails Routes: map.resources :teams
Session Break Coffee ?
Part 2.1 ActiveRecord ,[object Object],[object Object],[object Object],[object Object],[object Object]
Object Relational Mapping ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Database “rules” ,[object Object],[object Object],[object Object],[object Object],[object Object]
Database “rules” contd.. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Part 2.4 Migrations ,[object Object],[object Object],[object Object],[object Object]
Example of Migration ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],This creates customer_id field in database. Relation between Customer and Address is determined by the models. i.e. class Customer has_one :address
Rake ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Part 3 – Hands-on work Building a Rails Application
Ruby on Rails Installation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Setup the Environment ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Rails Project Layout ..../app ......../controller ......../helpers ......../models ......../views ............/layouts ..../config ..../components ..../db ..../doc ..../lib ..../log ..../public ..../script ..../test ..../tmp ..../vendor ......../plugins Core Application code: Controllers, Helpers, Models, Views Configuration for database, initializers,routes Database migrations Additional or custom libraries, rake tasks etc. The HTDOC for this web project. This contains JS, CSS, images etc. External plugins for this project.
Session Break Coffee ?
ActiveRecord Validations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ActiveRecord Callbacks ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ActiveRecord Relations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Database revisit ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],This line is actually not necessary in Rails as migrations handle this.
has_one ↔ belongs_to ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Database revisit ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
has_many ↔ belongs_to ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Camelization !!
Database Revist ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
has_many :through => ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Named Scopes ,[object Object],[object Object],[object Object],[object Object],[object Object]
Named Scope example class Customer < ActiveRecord::Base has_many :bank_accounts named_scope :hni, :conditions => [ ‘hni = ?’ true ] named_scope :high_risk lambda do | list | { :joins => ‘risk_customer_lists’, :conditions => [‘name in (?)’, list ] } End @customers = Customer.hni @customers = Customer.hni @customers = @customers.high_risk(terrorists) @customers = Customer.hni.high_risk(terrorists)
Hands On! ,[object Object],[object Object],[object Object],[object Object]
Session Break Coffee ?
Part 2.2 ActionController ,[object Object],[object Object],[object Object],[object Object],[object Object]
Processing a HTTP Rails request ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Helpers ,[object Object],[object Object],[object Object],Hmm.. Why are helpers not available to the model?
Filters ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ActionController example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],GET and POST parameters are accessed via params
Part 2.3 ActionView ,[object Object],[object Object],[object Object],[object Object]
Partials ,[object Object],[object Object],[object Object],[object Object]
Layouts ,[object Object],[object Object],[object Object]
Rendering Views ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
FormHelpers ,[object Object],[object Object],[object Object],[object Object],[object Object]
Ajax on Rails ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Session Break Coffee ?
Building a Rails Application ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Rails helps you build web applications really fast but YOU STILL HAVE TO DESIGN IT !!
Application Idea?? Lets think of one now Pre-decided
Survey Application ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Survey Application ,[object Object],[object Object],[object Object],[object Object]
Is the above too easy ??  ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Survey Application survey questions answers users
Relationships ,[object Object],[object Object],[object Object],[object Object],[object Object]
Migrations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Migrations contd.. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Scaffolding ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Checklist ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Actual Development (finally) ,[object Object],[object Object],[object Object],[object Object]
Session Break Coffee ?
Deploying the application ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Configuring routes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Enterprise Deployment ,[object Object],[object Object],[object Object],[object Object],[object Object]
Capistrano – Rails Deployment ,[object Object],[object Object],[object Object],[object Object]
Session Break Coffee ?
Advanced Topics ,[object Object],[object Object],[object Object],[object Object]
Behaviour Driven Development ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Test Driven Development ,[object Object],[object Object],[object Object],[object Object],[object Object]
Rspec ,[object Object],[object Object],[object Object],[object Object]
Nuances of Rspec ,[object Object],[object Object],[object Object],[object Object],[object Object]
Rspec - Typical Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Rspec – Pending Examples ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Before & After Code ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Before & after code example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Helper Routines ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Rspec – further reading ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Hands On! ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
References ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Thank You!

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Ruby On Rails

  • 1. Ruby On Rails Gautam Rege Josh Software Pvt. Ltd.
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  • 3. Part – 1 Ruby on Rails Introduction
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  • 10. Overall Comparison Rails Pylons cgi/perl Web-frameworks    Plug-ins / auto-installation    Object Oriented Nature  Weak References (leaks)    Garbage Collection    Loose Data Typing    Data Types: Arrays, Hash Ruby Python Perl Features
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  • 18. Part 2 – Rails Architecture
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  • 20. Model – View – Controller
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  • 26. A word about RESTfull Rails Routes: map.resources :teams
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  • 35. Part 3 – Hands-on work Building a Rails Application
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  • 38. Rails Project Layout ..../app ......../controller ......../helpers ......../models ......../views ............/layouts ..../config ..../components ..../db ..../doc ..../lib ..../log ..../public ..../script ..../test ..../tmp ..../vendor ......../plugins Core Application code: Controllers, Helpers, Models, Views Configuration for database, initializers,routes Database migrations Additional or custom libraries, rake tasks etc. The HTDOC for this web project. This contains JS, CSS, images etc. External plugins for this project.
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  • 50. Named Scope example class Customer < ActiveRecord::Base has_many :bank_accounts named_scope :hni, :conditions => [ ‘hni = ?’ true ] named_scope :high_risk lambda do | list | { :joins => ‘risk_customer_lists’, :conditions => [‘name in (?)’, list ] } End @customers = Customer.hni @customers = Customer.hni @customers = @customers.high_risk(terrorists) @customers = Customer.hni.high_risk(terrorists)
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  • 66. Application Idea?? Lets think of one now Pre-decided
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  • 70. Survey Application survey questions answers users
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