Download Advanced Rails Recipes by Mike Clark PDF

By Mike Clark

From the writer of the imperative Rails Recipes , and with the aid of a brand new grasp Rails chef within the kitchen, listed below are seventy two new how one can kick your Ruby on Rails apps up a notch. extra Rails Recipes is a suite of useful recipes for dressing up your net program with little fuss. you will find out how the professionals have solved the cruel difficulties utilizing the main state of the art Rails ideas so that you can convey your lovely net app swifter and more straightforward.

builders through the millions are coming to Rails-the advantages are transparent, either to members and their corporations.

yet how can a developer be anticipated to put in writing idiomatic, potent Rails code whilst the know-how is so new? the answer's to paintings along masters, humans who have been there from the beginning (and who've the scars to end up it). And, what higher technique to examine from their adventure than to examine their code and skim their reasons of why it truly is written that method? or even larger think if that code might be lifted and positioned correct into your personal software.

this can be higher than simply cut-and-paste: the recipe layout capacity you are going to comprehend the code, and be ready to alter it to fit your wishes. And the record of recipes is so large that you are guaranteed to locate assistance and strategies the place you are going to say "Oh! that is how they do that," or, "I did not be aware of you'll do this in Rails."

With extra Rails Recipes , a following as much as the preferred unique Rails Recipes , you could cook dinner up a storm.

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Now we know our Active Record operations are flowing to the appropriate database. 55 10. ] Now we can distribute the bulk of the database load across a number of slave databases and let the master database focus on handling write operations. Discussion Using slave databases has some disadvantages, primarily the replication lag. While the replication is in progress, the slave database won’t have the latest data. org) Pierre-Alexandre is a 21-year-old French application developer specializing in Ruby on Rails.

All { render :nothing => true, :status => "404 Not Found" } end end end 7. C ATCH A LL 404 S There’s not much to this controller. com), the path (/please/catch/me), and the URL of the page that triggered this request if it exists. save end end Using find_and_initialize_by lets us fetch the FourOhFour record if it already exists or initialize a new object (but not save it) if this is a unique 404. Incrementing the count gives us some indication of the 404 URL’s popularity. rb file, we’ll end up with a permanent record.

On a practical note, you have a number of knobs to turn and levers to pull to help your application scale. One naive approach to improving scalability is to throw more Mongrel processes into the mix. But that’s futile if your database is the real bottleneck. In that situation, after tuning your SQL queries, you may want to partition database access into read and write operations using master/slave database replication. But once you’ve set that up at the database level, how do you arrange things in your application to take advantage of it?

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