Sha256: 7416d6369124d96e2d3277ef63559bfa0b2b5998bcb44ee24914c222fd68ca4a
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Size: 1.11 KB
Versions: 13
Compression:
Stored size: 1.11 KB
Contents
module ActiveRecord # :nodoc:
class Base # :nodoc:
# Synchronizes the passed in ActiveRecord instances with data
# from the database. This is like calling reload
# on an individual ActiveRecord instance but it is intended for use on
# multiple instances.
#
# This uses one query for all instance updates and then updates existing
# instances rather sending one query for each instance
def self.synchronize(instances, key=self.primary_key)
return if instances.empty?
keys = instances.map(&"#{key}".to_sym)
klass = instances.first.class
fresh_instances = klass.find( :all, :conditions=>{ key=>keys }, :order=>"#{key} ASC" )
instances.each_with_index do |instance, index|
instance.clear_aggregation_cache
instance.clear_association_cache
instance.instance_variable_set '@attributes', fresh_instances[index].attributes
end
end
# See ActiveRecord::ConnectionAdapters::AbstractAdapter.synchronize
def synchronize(instances, key=ActiveRecord::Base.primary_key)
self.class.synchronize(instances, key)
end
end
end
Version data entries
13 entries across 13 versions & 5 rubygems