Advanced Rails Recipes by Mike Clark

By Mike Clark

From the writer of the fundamental 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 set of useful recipes for dressing up your net program with little fuss. you are going to learn the way the professionals have solved the harsh difficulties utilizing the main state-of-the-art Rails ideas so that you can bring your lovely internet app swifter and more straightforward.

builders by way of the hundreds of thousands are coming to Rails-the merits are transparent, either to members and their firms.

yet how can a developer be anticipated to write 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 higher method to research from their adventure than to examine their code and browse their reasons of why it is written that approach? or even greater think if that code may be lifted and put correct into your individual program.

this is often larger than simply cut-and-paste: the recipe structure potential you will comprehend the code, and be capable to alter it to fit your wishes. And the checklist of recipes is so huge that you are sure to locate information and methods 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 prepare dinner up a storm.

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If the update succeeds, we use head :ok to return an HTTP 200 response. If the update fails, we use head :unprocessable_entity to return an HTTP 422 response. This works well when you’re toggling attributes with Ajax, because you don’t care about the response. The fixed attribute in this case isn’t bound by any validation rules, so updating it isn’t likely to fail. If the update is dependent on validation, then your best bet is to use a full form and a synchronous request. 32 Recipe 5 Authenticate REST Clients Problem You’re developing a RESTful application such as an event management system with user accounts.

Between being an active father, husband, and outdoorsman, he finds time to run the Boulder Ruby group in Boulder, Colorado. After working for a series of start-up companies to deliver video-related applications, Andrew escaped neither burnt out nor dot-com rich. Much wiser for the experience, he currently leads a very pleasant life writing web applications under contract from his home in Lawrence, Kansas. Problem You want to stockpile multiple, distinct sets of data and easily load them into your database for different situations: impressive-looking data for sales demos, vast quantities of data for stress testing, real-life data for production seeding, and so on.

A DD F OREIGN K EY C ONSTRAINTS The fk method simply uses the execute method to add a foreign key constraint, and the drop_fk method does the opposite. Next, we’ll revise our migration for the line_items table to use the new fk and drop_fk methods. down drop_fk :line_items, :order_id drop_fk :line_items, :product_id drop_table :line_items end end We’ve used extend to add the methods in the MigrationHelpers module to our migration class. When the migration is applied, we call fk to add foreign key constraints.

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