Method: ActiveRecord::AttributeMethods::PrimaryKey::ClassMethods#primary_key=

Defined in:
activerecord/lib/active_record/attribute_methods/primary_key.rb

#primary_key=(value) ⇒ Object

Sets the name of the primary key column.

class Project < ActiveRecord::Base
  self.primary_key = 'sysid'
end

You can also define the #primary_key method yourself:

class Project < ActiveRecord::Base
  def self.primary_key
    'foo_' + super
  end
end

Project.primary_key # => "foo_id"



130
131
132
133
134
135
136
137
138
139
140
 
# File 'activerecord/lib/active_record/attribute_methods/primary_key.rb', line 130

def primary_key=(value)
  @primary_key = if value.is_a?(Array)
    include CompositePrimaryKey
    @primary_key = value.map { |v| -v.to_s }.freeze
  elsif value
    -value.to_s
  end

  @composite_primary_key = value.is_a?(Array)
  @attributes_builder = nil
end