By Dave Thomas
I purchased this one with 'Programming Ruby' pondering that i'd desire either to appreciate what RoR is all approximately, yet 'Programming Ruby' remains to be at the shelf and in a couple of days i used to be operating the buying cart instance. wonderful means to benefit easy methods to use the framework. And from what I observed, the recent model is evolving on the comparable quick velocity as Rails. that is my subsequent purchase.
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Extra info for Agile Web Development with Rails: A Pragmatic Guide (Pragmatic Programmers)
Example text
Well, we could just hack. After all, a Rails application is just Ruby source code. But Rails also does a lot of magic behind the curtain to get our applications to work with a minimum of explicit configuration. To get this magic to work, Rails needs to find all the various components of your application. 2, Directory Structure, on page 173), this means that we need to create a specific directory structure, slotting the code we write into the appropriate places. The rails command simply creates this directory structure for us and populates it with some standard Rails code.
Finally, you might have noticed that I’ve duplicated the product’s price in the line item data. Here I’m breaking the “initially, keep it simple” rule slightly, but it’s a transgression based on experience. If the price of a product changes, that price change should not be reflected in the line item price of currently open orders, so each line item needs to reflect the price of the product at the time the order was made. Again, at this point I’ll double check with my customer that we’re still on the right track.
Be slightly careful here—if you have an existing directory called demo, you will be asked if you want to overwrite any existing files. log work> The command has created a directory named demo. Pop down into that directory, and list its contents (using ls on a Unix box or dir under Windows). You should see a bunch of files and subdirectories. work> cd demo demo> ls -p CHANGELOG README Rakefile app/ components/ config/ db/ doc/ lib/ log/ public/ script/ test/ vendor/ All these directories (and the files they contain) can be intimidating to start with, but we can ignore most of them when we start out.