Module: ActiveRecord::AttributeMethods::PrimaryKey

Extended by:
ActiveSupport::Concern
Defined in:
activerecord/lib/active_record/attribute_methods/primary_key.rb

Defined Under Namespace

Modules: ClassMethods

Instance Method Summary collapse

Methods included from ActiveSupport::Concern

append_features, class_methods, extended, included

Instance Method Details

#idObject

Returns the primary key value.


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# File 'activerecord/lib/active_record/attribute_methods/primary_key.rb', line 17

def id
  if pk = self.class.primary_key
    sync_with_transaction_state
    _read_attribute(pk)
  end
end

#id=(value) ⇒ Object

Sets the primary key value.


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# File 'activerecord/lib/active_record/attribute_methods/primary_key.rb', line 25

def id=(value)
  sync_with_transaction_state
  write_attribute(self.class.primary_key, value) if self.class.primary_key
end

#id?Boolean

Queries the primary key value.

Returns:

  • (Boolean)

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# File 'activerecord/lib/active_record/attribute_methods/primary_key.rb', line 31

def id?
  sync_with_transaction_state
  query_attribute(self.class.primary_key)
end

#id_before_type_castObject

Returns the primary key value before type cast.


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# File 'activerecord/lib/active_record/attribute_methods/primary_key.rb', line 37

def id_before_type_cast
  sync_with_transaction_state
  read_attribute_before_type_cast(self.class.primary_key)
end

#id_wasObject

Returns the primary key previous value.


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# File 'activerecord/lib/active_record/attribute_methods/primary_key.rb', line 43

def id_was
  sync_with_transaction_state
  attribute_was(self.class.primary_key)
end

#to_keyObject

Returns this record's primary key value wrapped in an Array if one is available.


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# File 'activerecord/lib/active_record/attribute_methods/primary_key.rb', line 10

def to_key
  sync_with_transaction_state
  key = self.id
  [key] if key
end