Read e-book online Advanced Rails Recipes PDF

By Mike Clark

ISBN-10: 0978739221

ISBN-13: 9780978739225

From the writer of the crucial Rails Recipes , and with the aid of a brand new grasp Rails chef within the kitchen, listed below are seventy two new how you can kick your Ruby on Rails apps up a notch. extra Rails Recipes is a set of functional recipes for dressing up your net software with little fuss. you will find out how the professionals have solved the cruel difficulties utilizing the main state-of-the-art Rails recommendations so that you can convey your gorgeous internet app speedier and more straightforward.

builders through the hundreds of thousands are coming to Rails-the merits are transparent, either to members and their corporations.

yet how can a developer be anticipated to jot down idiomatic, powerful Rails code while the expertise is so new? the answer's to paintings along masters, humans who have been there from the beginning (and who've the scars to turn out it). And, what greater technique to research from their adventure than to examine their code and skim their motives of why it really is written that method? or even greater think if that code should be lifted and positioned correct into your individual program.

this is often larger than simply cut-and-paste: the recipe structure capability 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 certain to locate suggestions and strategies the place you are going to say "Oh! that is how they do that," or, "I did not understand you may do this in Rails."

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

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Extra resources for Advanced Rails Recipes

Example text

When someone shouts, we want it to go to the master (write) database. The database server will then take care of replicating the shout record down to our slave database. Lots of people listen for shouts from their friends, so we want reading shout records to go through the slave database. Once we’ve configured replication at the database server level,1 the masochism plug-in lets us seamlessly take advantage of the master/ Because database replication is very specific to your database, it’s beyond the scope of this recipe.

Find(:all) => [] As expected, we gave a shout-out, and it was written to the master database. However, because we haven’t configured database replication between the master and slave, calling find doesn’t find the shout. This tells us that the find is using the slave database. 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.

It doesn’t take much to start using fixture files for more than testing. We’ll use the Rake tasks that come with the dataset plug-in, but you can easily use this as a springboard to write your own custom tasks. For example, say we’ve used our web application to whip up some slick data for an upcoming sales demo. We’ve created new accounts, added 1. html 12. U SE F IXTURES FOR C ANNED D ATASETS some goodies to each account, and formed other model relationships. Now we just need to preserve the state of the database in a set of fixtures (a dataset).

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Advanced Rails Recipes by Mike Clark

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