TAILIEUCHUNG - HandBooks Professional Java-C-Scrip-SQL part 24

Tham khảo tài liệu 'handbooks professional java-c-scrip-sql part 24', công nghệ thông tin, kỹ thuật lập trình phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | . The Essence So Rails is not a toy and it s not a gimmick. In my opinion Rails represents a significant advance in the state of the art. You ve probably seen frameworks like this one solve the database-with-UI problem in several different ways Object-oriented development frameworks are flexible and robust. They re usually at a lower abstraction level so they may not be as productive. You can use them to create flexible robust and powerful applications but you re going to pay for it with productivity. Quick compromise frameworks trade conventional wisdom and sound design for implementation speed. PHP and Visual Basic for example compromise by trading design wisdom frameworks should encourage separation of model and view logic for development speed. Code generation frameworks generate most of the code for such an application at compile time. They trade the feedback cycle easy maintenance and often customization for speed. Customization point frameworks take a few parameters like database tables or models and build default implementations with a few well-defined anticipated customization points. These frameworks break down when the inventor s imagination doesn t anticipate important hook points. Rails is none of these. It uses macros to help you quickly generate code based on the structure of the database and a few well-placed macros. Since you effectively get generated code at runtime without tangled source code you don t have to maintain the added code. Rails avoids the trap of customization points through Ruby s extensive hook points. You start with a clean design. You can then extend it through subclassing changing class definitions or any of the other metaprogramming techniques we discussed. You can even replace major Rails components like Active Record. Rails accelerates your development through meaningful conventions and defaults. By guiding your naming strategies in the database Rails can save you lots of typing and infer your intent by the consistent .

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