1、Rails has a somewhat magical component called the Active Record.
2、There are many Active Record updates in this release including the introduction of nested transactions.
3、Active Record users do not always need to change model objects as the data model changes.
4、The Streamlined creators could have easily added customization data to Active Record.
5、Move away from Active Record into complete Domain Driven development, separating my data access away from the user object.
6、The Streamlined approach lets a single place consolidate common view characteristics, much as Active Record does for persistence concerns.
7、The framework queries two sources of metadata: the Active Record model and a custom metadata file for each model object.
8、With ORM, you can work with software objects that represent your data and let the Active Record library take care of communicating with the database.
9、Active Record associates a class with a table and dynamically adds an attribute to each class for every column in the database.
10、Through some nifty lexical analysis, Active Record is able to determine that the ORDER class will map to the ORDERS table in the database.
11、view accessing the Active Record Trail model and looping through each trail in @trails with the for trail in @trails %> command.
