如何在Ruby / Rails中指定私有或受保护的属性？

Question

How do you designate private or protected attributes in Ruby/Rails?

Are all DB fields automatically attributes, and don't need to be defined in the Model?

Any recommended tutorials?

Working in Rails 3.0.7.

Answer 1

The title doesn't match the question.

Yes, DB fields are automatically attributes (depending on what you mean by attribute; they're not simply @column_name as with attr_accessor ).

You can provide some level of accessibility by using attr_accessible and attr_protected , but that's for mass-assignment, not general access.

Answer 2

You can use attr_protected , attr_accessible or attr_readonly

The attr_protected , attr_readonly and attr_accessible macros control what is accepted for mass-assignment. Read those links if you're not familiar with the difference between those three macros.

Documentation of ActiveRecord model:

http://api.rubyonrails.org/classes/ActiveRecord/Base.html

http://apidock.com/rails/ActiveRecord/Base