Rails 2.3.11

[redminele/redminele.git] / ruby / lib / ruby / gems / 1.8 / gems / activerecord-2.3.5 / lib / active_record / batches.rb

diff --git a/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/batches.rb b/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/batches.rb
deleted file mode 100644 (file)
index 5a6cecd..0000000
--- a/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/batches.rb
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@@ -1,81 +0,0 @@
-module ActiveRecord
-  module Batches # :nodoc:
-    def self.included(base)
-      base.extend(ClassMethods)
-    end
-
-    # When processing large numbers of records, it's often a good idea to do
-    # so in batches to prevent memory ballooning.
-    module ClassMethods
-      # Yields each record that was found by the find +options+. The find is
-      # performed by find_in_batches with a batch size of 1000 (or as
-      # specified by the <tt>:batch_size</tt> option).
-      #
-      # Example:
-      #
-      #   Person.find_each(:conditions => "age > 21") do |person|
-      #     person.party_all_night!
-      #   end
-      #
-      # Note: This method is only intended to use for batch processing of
-      # large amounts of records that wouldn't fit in memory all at once. If
-      # you just need to loop over less than 1000 records, it's probably
-      # better just to use the regular find methods.
-      def find_each(options = {})
-        find_in_batches(options) do |records|
-          records.each { |record| yield record }
-        end
-
-        self
-      end
-
-      # Yields each batch of records that was found by the find +options+ as
-      # an array. The size of each batch is set by the <tt>:batch_size</tt>
-      # option; the default is 1000.
-      #
-      # You can control the starting point for the batch processing by
-      # supplying the <tt>:start</tt> option. This is especially useful if you
-      # want multiple workers dealing with the same processing queue. You can
-      # make worker 1 handle all the records between id 0 and 10,000 and
-      # worker 2 handle from 10,000 and beyond (by setting the <tt>:start</tt>
-      # option on that worker).
-      #
-      # It's not possible to set the order. That is automatically set to
-      # ascending on the primary key ("id ASC") to make the batch ordering
-      # work. This also mean that this method only works with integer-based
-      # primary keys. You can't set the limit either, that's used to control
-      # the the batch sizes.
-      #
-      # Example:
-      #
-      #   Person.find_in_batches(:conditions => "age > 21") do |group|
-      #     sleep(50) # Make sure it doesn't get too crowded in there!
-      #     group.each { |person| person.party_all_night! }
-      #   end
-      def find_in_batches(options = {})
-        raise "You can't specify an order, it's forced to be #{batch_order}" if options[:order]
-        raise "You can't specify a limit, it's forced to be the batch_size"  if options[:limit]
-
-        start = options.delete(:start).to_i
-        batch_size = options.delete(:batch_size) || 1000
-
-        with_scope(:find => options.merge(:order => batch_order, :limit => batch_size)) do
-          records = find(:all, :conditions => [ "#{table_name}.#{primary_key} >= ?", start ])
-
-          while records.any?
-            yield records
-
-            break if records.size < batch_size
-            records = find(:all, :conditions => [ "#{table_name}.#{primary_key} > ?", records.last.id ])
-          end
-        end
-      end
-      
-      
-      private
-        def batch_order
-          "#{table_name}.#{primary_key} ASC"
-        end
-    end
-  end
-end
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