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Tie a Text Field to a Model

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File: controllers\hello_controller.rb

class HelloController < ApplicationController
  def there
    @data_hash = params[:cruncher]
    @cruncher = Cruncher.new(@data_hash[:crunch])

    @data = @cruncher.crunch
  end

  def input
  end
end

File: app\models\cruncher.rb

class Cruncher
  attr_reader :crunch
  attr_writer :crunch

  def initialize(data)
    @crunch = data
  end

end

File: app\views\hello\input.rhtml

<html>
  <head>
    <title>Using Text Fields</title>
  </head>
  <body>
    <h1>Working With Text Fields</h1>
    This Ruby on Rails application lets you read data from text fields.
    <br>
    <%= form_tag ({:action => 'there'}, {:method => 'post'}) %>
      Please enter your name.
      <br>
      <%= text_field ('cruncher', 'crunch', {'size' => 30}) %>
      <br>
      <br>
      <input type='submit'/>
    <%= form_tag %>
  </body>
</html>

File: app\views\hello\there.rhtml

<html>
  <head>
    <title>Using HTML Control Shortcuts</title>
  </head>

  <body>
    <h1>Using HTML Control Shortcuts</h1>
    This application uses Rails HTML control shortcuts.
    <br>
    <br>
    Your name is <%= @data %>.
    <br>
    <br>
  </body>
</html>

Start the WEBrick server: ruby script/server
http://localhost:3000/hello/input

标签:Ruby,Rails

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