2010/9/22 Abder-Rahman Ali <[email protected]> > I have a small Rails application I'm creating. > > I have for example a field called "sales_result". > > I also have another two fields, namely, "price" and "quantity_sold". > > I have the following formula: > > sales_result = price * quantity_sold > > How can I perform this formula in my rails application? Such that, when > I for example enter the following values: > > price = 3.0 > quantity_sold = 3 > > I get this result calculated automatically for "sales_result": > > sales_result = 9 > > Where should I start in the Rails application in performing this > calculation? >
The Rails' Way of doing things is to have fat models and thin views. In other ways, most of the code that deals with critical operations like calculations, database manipulations need to be done at a "model" level. Remember that Rails is a Ruby framework, where as Ruby is object oriented. And by being an object-oriented programming language, most of the operations happen within the object itself. If you want to get the calculations automatically, consider using AJAX. --- Edmond Software Developer | Baobab Health Trust (http://www.baobabhealth.org/) | Malawi Cell: +265 999 465 137 | +265 881 234 717 *"Many people doubt open source software and probably don’t realize that there is an alternative… which is just as good.." -- Kevin Scannell* -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
