Rails contoller view
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Rails contoller view
- 1. The MVC Pattern John Abraham Model-View-Controller
- 4. C in MVC • Controller is responsible for making sense of the request and initiates in the cycle to generate a appropriate output • A middle man between models and views • Makes the model data available to the view so it can display that data to the user, and it saves or updates data from the • REST
- 5. C in MVC cont… • A controller is a Ruby class which inherits from ApplicationController • ApplicationController inherits from ActionController::Base, which defines a number of helpful methods • Params Hash - query string & post data • Eg: “GET /clients?id=1&name=Joe” params = {‘id’ => ‘1’, ‘name’ => ‘Joe’}
- 6. HostName Port (default 80) Controller Name Action Name REST URL id class User < ApplicationController before_action :authenticate def show id = params[‘id’] … … end end
- 7. V in MVC
- 8. V in MVC • Views represent the user interface of your application. • In Rails, views are often HTML files with embedded Ruby code that perform tasks related solely to the presentation of the data. • Views handle the job of providing data to the web browser
- 9. ERB <html> <head> … … … </head> <body> Hi, this is <%= @name %>. </body> </html>
- 10. Directory Structure class UserController < ApplicationController def show @name = ‘John’ …… end end controllers/user_controller.rb <h1>Hi this is <%= @name %>.</h1> views/users/show.html.erb
- 11. Layouts <html> <head></head> <body> <%= yield %> </body> </html> <h1>Hi this is <%= @name %>.</h1> <html> <head></head> <body> Hi, this is John. </body> </html>
- 12. Thank You …