Active Record Attribute Methods Primary Key

Namespace

Module

Methods

Instance Public methods

id()

Returns the primary key column’s value. If the primary key is composite, returns an array of the primary key column values.

📝 Source code 
# File activerecord/lib/active_record/attribute_methods/primary_key.rb, line 18
      def id
        _read_attribute(@primary_key)
      end
🔎 See on GitHub

id=(value)

Sets the primary key column’s value. If the primary key is composite, raises TypeError when the set value not enumerable.

📝 Source code 
# File activerecord/lib/active_record/attribute_methods/primary_key.rb, line 28
      def id=(value)
        _write_attribute(@primary_key, value)
      end
🔎 See on GitHub

id?()

Queries the primary key column’s value. If the primary key is composite, all primary key column values must be queryable.

📝 Source code 
# File activerecord/lib/active_record/attribute_methods/primary_key.rb, line 34
      def id?
        _query_attribute(@primary_key)
      end
🔎 See on GitHub

id_before_type_cast()

Returns the primary key column’s value before type cast. If the primary key is composite, returns an array of primary key column values before type cast.

📝 Source code 
# File activerecord/lib/active_record/attribute_methods/primary_key.rb, line 40
      def id_before_type_cast
        attribute_before_type_cast(@primary_key)
      end
🔎 See on GitHub

id_in_database()

Returns the primary key column’s value from the database. If the primary key is composite, returns an array of primary key column values from database.

📝 Source code 
# File activerecord/lib/active_record/attribute_methods/primary_key.rb, line 52
      def id_in_database
        attribute_in_database(@primary_key)
      end
🔎 See on GitHub

id_was()

Returns the primary key column’s previous value. If the primary key is composite, returns an array of primary key column previous values.

📝 Source code 
# File activerecord/lib/active_record/attribute_methods/primary_key.rb, line 46
      def id_was
        attribute_was(@primary_key)
      end
🔎 See on GitHub

to_key()

Returns this record’s primary key value wrapped in an array if one is available.

📝 Source code 
# File activerecord/lib/active_record/attribute_methods/primary_key.rb, line 11
      def to_key
        key = id
        Array(key) if key
      end
🔎 See on GitHub