def construct_association(record, join, row)
case join.reflection.macro
when :has_many, :has_and_belongs_to_many
collection = record.send(join.reflection.name)
collection.loaded
return nil if record.id.to_s != join.parent.record_id(row).to_s or row[join.aliased_primary_key].nil?
association = join.instantiate(row)
collection.target.push(association) unless collection.target.include?(association)
when :has_one, :belongs_to
return if record.id.to_s != join.parent.record_id(row).to_s or row[join.aliased_primary_key].nil?
association = join.instantiate(row)
record.send("set_#{join.reflection.name}_target", association)
else
raise ConfigurationError, "unknown macro: #{join.reflection.macro}"
end
return association
end