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For 2021 - online Python 3 training - see ((here)).

Our plans were to retire in summer 2020 and see the world, but Coronavirus has lead us into a lot of lockdown programming in Python 3 and PHP 7.
We can now offer tailored online training - small groups, real tutors - works really well for groups of 4 to 14 delegates. Anywhere in the world; course language English.

Please ask about private 'maintenance' training for Python 2, Tcl, Perl, PHP, Lua, etc.
Ruby of Rails - cleanly displaying model data in the view

The display of data from our model has - thus far - been formatted in the Controller (when that really ought be in the view) and has been liable to fail to display properly if the data contains HTML special characters such as < and &. The solution to this is provided for you by rails - simply pass through the model object to be displayed to the view, and use the h method therein to "webify" the data.

1. Pass the complete object that you want to display through the controller into the view

  def single
    @main_result = "-"
    stockdata = Product.all
    stockdata.each do |stock|
      if stock.pname == params[:name] # Params is from a "form"
        @info = stock
      end
    end
  end


2. In the view, use the h function on individual member fields to ensure that they're cleaned on output

  <h1>Single Record Report</h1>
  To revert to product list: <b><%= @main_result %></b><br /><br />
  All about the product: <b><%= h @info.pname %></b><br />
    Price: <%= h @info.unitprice %><br />
    Quantity: <%= h @info.stocklevel %>
    <br /><br />



This is one of a series of summaries taking you from initial installation of Ruby and Rails through to a complete multitable application:
[link] - Installing Ruby and Rails
[link] - Hello World, Ruby on Rails Style
[link] - What and Why - Model, View, Controller
[link] - Multiple views, same model
[link] - A form to allow data to be added to the model
[link] - Validating data entries for storage in the model
[link] - Cleanly viewing model data
[link] - Complete sample, including a multiple table model
These topics are covered on our Introduction to Rails day - an optional extension of Ruby Programming or Learning to program in Ruby



(written 2012-06-23)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
R202 - Ruby on Rails
  [1050] The HTML++ Metalanguage - (2007-01-22)
  [1302] Ruby, Ruby, Ruby. Rails, Rails, Rails. - (2007-08-13)
  [1375] Python v Ruby - (2007-10-02)
  [1745] Moodle, Drupal, Django (and Rails) - (2008-08-08)
  [2605] Ruby on Rails - a sample application to teach you how - (2010-01-30)
  [2607] Answers on Ruby on Rails - (2010-01-30)
  [2609] Scope of variables - important to Ruby on Rails - (2010-01-31)
  [3624] Why do we need a Model, View, Controller architecture? - (2012-02-25)
  [3756] Ruby on Rails - how it flows, and where the files go - (2012-06-08)
  [3772] Hello World - Ruby on Rails - a checklist of each step - (2012-06-22)
  [3777] Multiple views in a single appication - sharing common parts of the template - Ruby on Rails - (2012-06-23)
  [3778] Providing a form to allow the user to add data to the model - Ruby on Rails - (2012-06-23)
  [3779] Adding validation to form entries and sticky fields - Ruby on Rails - (2012-06-23)
  [3919] What is a web framework? - (2012-11-10)
  [4010] Really Simple Rails - (2013-02-17)
  [4013] Web Frameworks - nested templates - (2013-02-22)


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Private, Protected, Public in Ruby. What about interfaces and abstract classes in Ruby?
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Steam train calls at Melksham - Pictures
Load path, load and require in Ruby, and a change from 1.8 to 1.9
Standard methods available on all objects in Ruby
Private, Protected, Public in Ruby. What about interfaces and abstract classes in Ruby?
Ruby of Rails - cleanly displaying model data in the view
Some traps it's so easy to fall into in designing your web site
Alan Turing - 1912 to 1954
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This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

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