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Versions: 12
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Contents
module ActiveRecord
module AttributeMethods
module PrimaryKey
extend ActiveSupport::Concern
# Returns this record's primary key value wrapped in an Array
# or nil if the record is a new_record?
def to_key
new_record? ? nil : [ id ]
end
module ClassMethods
# Defines the primary key field -- can be overridden in subclasses. Overwriting will negate any effect of the
# primary_key_prefix_type setting, though.
def primary_key
reset_primary_key
end
def reset_primary_key #:nodoc:
key = get_primary_key(base_class.name)
set_primary_key(key)
key
end
def get_primary_key(base_name) #:nodoc:
key = 'id'
case primary_key_prefix_type
when :table_name
key = base_name.to_s.foreign_key(false)
when :table_name_with_underscore
key = base_name.to_s.foreign_key
end
key
end
# Sets the name of the primary key column to use to the given value,
# or (if the value is nil or false) to the value returned by the given
# block.
#
# class Project < ActiveRecord::Base
# set_primary_key "sysid"
# end
def set_primary_key(value = nil, &block)
define_attr_method :primary_key, value, &block
end
alias :primary_key= :set_primary_key
end
end
end
end
Version data entries
12 entries across 12 versions & 1 rubygems