Module: ActiveRecord::AttributeMethods::Read
Relationships & Source Files | |
Namespace Children | |
Modules:
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Super Chains via Extension / Inclusion / Inheritance | |
Class Chain:
self,
::ActiveSupport::Concern
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Defined in: | activerecord/lib/active_record/attribute_methods/read.rb |
Class Method Summary
::ActiveSupport::Concern
- Extended
class_methods | Define class methods from given block. |
included | Evaluate given block in context of base class, so that you can write class macros here. |
prepended | Evaluate given block in context of base class, so that you can write class macros here. |
append_features, prepend_features |
Instance Method Summary
-
#read_attribute(attr_name, &block)
Returns the value of the attribute identified by
attr_name
after it has been type cast. -
#attribute(attr_name, &block)
private
Alias for #_read_attribute.
-
#_read_attribute(attr_name, &block)
(also: #attribute)
Internal use only
This method exists to avoid the expensive primary_key check internally, without breaking compatibility with the read_attribute API.
Instance Method Details
#_read_attribute(attr_name, &block) Also known as: #attribute
This method exists to avoid the expensive primary_key check internally, without breaking compatibility with the read_attribute API
# File 'activerecord/lib/active_record/attribute_methods/read.rb', line 38
def _read_attribute(attr_name, &block) # :nodoc: @attributes.fetch_value(attr_name, &block) end
#attribute(attr_name, &block) (private)
Alias for #_read_attribute.
# File 'activerecord/lib/active_record/attribute_methods/read.rb', line 42
alias :attribute :_read_attribute
#read_attribute(attr_name, &block)
Returns the value of the attribute identified by attr_name
after it has been type cast. For example, a date attribute will cast “2004-12-12” to Date.new(2004, 12, 12)
. (For information about specific type casting behavior, see the types under ::ActiveModel::Type
.)
# File 'activerecord/lib/active_record/attribute_methods/read.rb', line 29
def read_attribute(attr_name, &block) name = attr_name.to_s name = self.class.attribute_aliases[name] || name @attributes.fetch_value(name, &block) end