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Module: ActiveRecord::AttributeMethods::Read

Relationships & Source Files
Namespace Children
Modules:
ClassMethods
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::ActiveSupport::Concern
Defined in: activerecord/lib/active_record/attribute_methods/read.rb

Overview

=====================================

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

Instance Method Details

#_read_attr(attr_name)

This method is for internal use only.

Like #_read_attribute, but a missing attribute raises ::ActiveModel::MissingAttributeError.

[ GitHub ] 

  


# File 'activerecord/lib/active_record/attribute_methods/read.rb', line 57



def _read_attr(attr_name) # :nodoc:
  @attributes.fetch_value!(attr_name)
end


  








  

    #_read_attribute(attr_name, &block)  
    Also known as: #attribute
  

  

    This method is for internal use only.
  



  

    
This method exists to avoid the expensive primary_key check internally, without
breaking compatibility with the read_attribute API

  



  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/attribute_methods/read.rb', line 51



def _read_attribute(attr_name, &block) # :nodoc:
  @attributes.fetch_value(attr_name, &block)
end


  








  

    #attribute(attr_name, &block)   (private)
  



  

    
Alias for #_read_attribute.

  



  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/attribute_methods/read.rb', line 61



alias :attribute :_read_attribute


  








  

    #read_attr(attr_name)  
  

  

    This method is for internal use only.
  



  

    
Like #read_attribute, but attr_name must be a ::String, and a missing
attribute raises ::ActiveModel::MissingAttributeError.
We assume that attribute name is a string.  This is an internal method,
don't call it!

  



  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/attribute_methods/read.rb', line 45



def read_attr(attr_name) # :nodoc:
  @attributes.fetch_value!(resolve_alias(attr_name))
end


  








  

    #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.)

  



  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/attribute_methods/read.rb', line 35



def read_attribute(attr_name, &block)
  name = resolve_alias(attr_name.to_s)

  @attributes.fetch_value(name, &block)
end