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Add documentation for class_attribute options

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This commit is contained in:
Glauco Custódio 2017-07-11 14:19:10 -03:00
parent fb129373a3
commit 5fa6563f09
2 changed files with 11 additions and 2 deletions
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10
activesupport/lib/active_support/core_ext/class/attribute.rb
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@ -7,6 +7,16 @@ class Class
# Declare a class-level attribute whose value is inheritable by subclasses.
# Subclasses can change their own value and it will not impact parent class.
#
# ==== Options
#
# * <tt>:instance_reader</tt> - Sets the instance reader method (defaults to true).
# * <tt>:instance_writer</tt> - Sets the instance writer method (defaults to true).
# * <tt>:instance_accessor</tt> - Sets both instance methods (defaults to true).
# * <tt>:instance_predicate</tt> - Sets a predicate method (defaults to true).
# * <tt>:default</tt> - Sets a default value for the attribute (defaults to nil).
#
# ==== Examples
#
# class Base
# class_attribute :setting
# end

3
guides/source/active_support_core_extensions.md
View file

@ -927,8 +927,7 @@ The generation of the writer instance method can be prevented by setting the opt
```ruby
module ActiveRecord
class Base
class_attribute :table_name_prefix, instance_writer: false
self.table_name_prefix = ""
class_attribute :table_name_prefix, instance_writer: false, default: "my"
end
end
```