/usr/lib/ruby/vendor_ruby/active_record/associations/belongs_to_polymorphic_association.rb is in ruby-activerecord-2.3 2.3.14-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 | module ActiveRecord
module Associations
class BelongsToPolymorphicAssociation < AssociationProxy #:nodoc:
def replace(record)
if record.nil?
@target = @owner[@reflection.primary_key_name] = @owner[@reflection.options[:foreign_type]] = nil
else
@target = (AssociationProxy === record ? record.target : record)
@owner[@reflection.primary_key_name] = record_id(record)
@owner[@reflection.options[:foreign_type]] = record.class.base_class.name.to_s
@updated = true
end
set_inverse_instance(record, @owner)
loaded
record
end
def updated?
@updated
end
private
# NOTE - for now, we're only supporting inverse setting from belongs_to back onto
# has_one associations.
def we_can_set_the_inverse_on_this?(record)
if @reflection.has_inverse?
inverse_association = @reflection.polymorphic_inverse_of(record.class)
inverse_association && inverse_association.macro == :has_one
else
false
end
end
def set_inverse_instance(record, instance)
return if record.nil? || !we_can_set_the_inverse_on_this?(record)
inverse_relationship = @reflection.polymorphic_inverse_of(record.class)
unless inverse_relationship.nil?
record.send(:"set_#{inverse_relationship.name}_target", instance)
end
end
def find_target
return nil if association_class.nil?
target =
if @reflection.options[:conditions]
association_class.find(
@owner[@reflection.primary_key_name],
:select => @reflection.options[:select],
:conditions => conditions,
:include => @reflection.options[:include]
)
else
association_class.find(@owner[@reflection.primary_key_name], :select => @reflection.options[:select], :include => @reflection.options[:include])
end
set_inverse_instance(target, @owner)
target
end
def foreign_key_present
!@owner[@reflection.primary_key_name].nil?
end
def record_id(record)
record.send(@reflection.options[:primary_key] || :id)
end
def association_class
@owner[@reflection.options[:foreign_type]] ? @owner[@reflection.options[:foreign_type]].constantize : nil
end
end
end
end
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