method

new

v5.0.0.1 - Show latest stable - 0 notes - Class: Core

1.0.0
1.1.6
1.2.6
2.0.3
2.1.0
2.2.1
2.3.8
3.0.0
3.0.9
3.1.0
3.2.1
3.2.8
3.2.13
4.0.2 (0)
4.1.8 (0)
4.2.1 (0)
4.2.7 (0)
4.2.9 (0)
5.0.0.1 (0)
5.1.7 (0)
5.2.3 (0)
6.0.0 (0)
6.1.3.1 (0)
6.1.7.7 (0)
7.0.0
7.1.3.2 (0)
7.1.3.4 (0)
What's this?

new(attributes = nil) public

New objects can be instantiated as either empty (pass no construction parameter) or pre-set with attributes but not yet saved (pass a hash with key names matching the associated table column names). In both instances, valid attribute keys are determined by the column names of the associated table – hence you can’t have attributes that aren’t part of the table columns.

Example:

# Instantiates a single new object
User.new(first_name: 'Jamie')

Show source

# File activerecord/lib/active_record/core.rb, line 312
    def initialize(attributes = nil)
      @attributes = self.class._default_attributes.deep_dup
      self.class.define_attribute_methods

      init_internals
      initialize_internals_callback

      assign_attributes(attributes) if attributes

      yield self if block_given?
      _run_initialize_callbacks
    end

new

Related methods

Example: