Câu hỏi phỏng vấn Ruby on Rails
Câu hỏi

What Is ORM In Rails?

Câu trả lời

ORM (Object-Relational Mapping) in Ruby on Rails is a technique that maps database tables to Ruby classes, allowing developers to interact with the database using Ruby code instead of writing raw SQL queries[1][2][3][4].

In Rails, the ORM layer is called Active Record. It follows the standard ORM model where:

  • Tables correspond to classes
  • Rows correspond to objects
  • Columns correspond to object attributes[4]

Active Record provides an abstraction layer that simplifies database operations, such as creating, reading, updating, and deleting records. It also handles database schema migrations, which allow developers to modify the database structure usi...

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