Retiring, March 2020 - sorry, you have missed our final public course.
The Coronavirus situation has lead us to suspend public training - which was on the cards anyway, with no plans to resume
Please ask about private 'maintenance' training for Python, Tcl, Perl, PHP, Lua, etc
Happily continuing private consultancy / programming work
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
2. In the view, use the
@main_result = "-"
stockdata = Product.all
stockdata.each do |stock|
if stock.pname == params[:name] # Params is from a "form"
@info = stock
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
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articlesR202 - Ruby on Rails 
Web Frameworks - nested templates - (2013-02-22) 
Really Simple Rails - (2013-02-17) 
What is a web framework? - (2012-11-10) 
Adding validation to form entries and sticky fields - Ruby on Rails - (2012-06-23) 
Providing a form to allow the user to add data to the model - Ruby on Rails - (2012-06-23) 
Multiple views in a single appication - sharing common parts of the template - Ruby on Rails - (2012-06-23) 
Hello World - Ruby on Rails - a checklist of each step - (2012-06-22) 
Ruby on Rails - how it flows, and where the files go - (2012-06-08) 
Why do we need a Model, View, Controller architecture? - (2012-02-25) 
Scope of variables - important to Ruby on Rails - (2010-01-31) 
Answers on Ruby on Rails - (2010-01-30) 
Ruby on Rails - a sample application to teach you how - (2010-01-30) 
Moodle, Drupal, Django (and Rails) - (2008-08-08) 
Python v Ruby - (2007-10-02) 
Ruby, Ruby, Ruby. Rails, Rails, Rails. - (2007-08-13) 
The HTML++ Metalanguage - (2007-01-22)
Some other Articles
Steam train calls at Melksham - PicturesLoad path, load and require in Ruby, and a change from 1.8 to 1.9Standard methods available on all objects in RubyPrivate, Protected, Public in Ruby. What about interfaces and abstract classes in Ruby?Ruby of Rails - cleanly displaying model data in the viewSome traps it's so easy to fall into in designing your web siteAlan Turing - 1912 to 1954
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