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The rails 3 way

The rails 3 way get flash player free latest Iconic best-seller The Rails Way returns in a brand new edition, fully updated to the. Foreword; Foreword to The Rails 4 Way; Foreword to The Rails 3 Way.


Summary: Many Rails developers don't understand what causes Active Record to actually execute a SQL query. But it’s an abstraction, intended to insulate you from the actual SQL queries being run on your database. Let's look at three common cases: misuse of the count method, using where to select subsets, and the present? You may be causing extra queries and N 1s through the abuse of these three methods. And, if you don’t understand how Active Record works, you may be causing SQL queries to run that you didn’t intend to. Unfortunately, the performance costs of many features of Active Record means we can’t afford to ignore unnecessary usage or treat our ORM as just an implementation detail. We need to understand exactly what queries are being run on our performance-sensitive endpoints. One particular case of Active Record misuse that I find is common amongst my clients is that Active Record is executing SQL queries that aren’t really necessary. Most of my clients are completely unaware that this is even happening. Ruby on Rails (“Rails”) is a popular open source framework, based on the Ruby programming language that strives to simplify and streamline the web application development process. Rails is built on the principle of convention over configuration. Simply put, this means that, by default, Rails assumes that its expert developers will follow “standard” best practice conventions (for things like naming, code structure, and so on) and, if you do, things will work for you “auto-magically” without your needing to specify these details. While this paradigm has its advantages, it is also not without its pitfalls. Most notably, the “magic” that happens behind the scenes in the framework can sometimes lead to headfakes, confusion, and “what the heck is going on? It can also have undesirable ramifications with regard to security and performance. The rails 3 way onam pictures free The expert guide to building Ruby on Rails applications Ruby on Rails. development I don't think its practical to buy any rails book thats over 3 months old. Iconic best-seller The Rails Way returns in a brand new edition, fully updated to the. Foreword; Foreword to The Rails 4 Way; Foreword to The Rails 3 Way.