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Class: ActiveModel::Attribute::FromDatabase

Do not use. This class is for internal use only.
Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::ActiveModel::Attribute
Instance Chain:
self, ::ActiveModel::Attribute
Inherits: ActiveModel::Attribute
Defined in: activemodel/lib/active_model/attribute.rb

Class Method Summary

::ActiveModel::Attribute - Inherited

.from_database, .from_user,
.new

This method should not be called directly.
.null, .uninitialized, .with_cast_value

Instance Attribute Summary

::ActiveModel::Attribute - Inherited

#came_from_user?, #changed?, #changed_in_place?, #has_been_read?, #initialized?, #name, #type, #value_before_type_cast,
#assigned?

Alias for #original_attribute.
#changed_from_assignment?, #original_attribute

Instance Method Summary

::ActiveModel::Attribute - Inherited

#==, #encode_with,
#eql?

Alias for #==.
#forgetting_assignment, #hash, #init_with, #original_value, #original_value_for_database, #serializable?, #type_cast, #value, #value_for_database, #with_cast_value, #with_type, #with_user_default, #with_value_from_database, #with_value_from_user, #_original_value_for_database, #_value_for_database, #initialize_dup

Constructor Details

This class inherits a constructor from ActiveModel::Attribute

Instance Method Details

#_original_value_for_database (private)

[ GitHub ] 

  


# File 'activemodel/lib/active_model/attribute.rb', line 192



def _original_value_for_database
  value_before_type_cast
end


  








  

    #forgetting_assignment  
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/attribute.rb', line 178



def forgetting_assignment
  # If this attribute was not persisted (with a `value_for_database`
  # that might differ from `value_before_type_cast`) and `value` has not
  # changed in place, we can use the existing `value_before_type_cast`
  # to avoid deserialize / cast / serialize calls from computing the new
  # attribute's `value_before_type_cast`.
  if !defined?(@value_for_database) && !changed_in_place?
    with_value_from_database(value_before_type_cast)
  else
    super
  end
end


  








  

    #type_cast(value)  
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/attribute.rb', line 174



def type_cast(value)
  type.deserialize(value)
end