austinmoore / dm-chunked_query

Allows performing chunked queries with DataMapper.

dm-chunked_query

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Description

Allows performing chunked queries on DataMapper Models or Collections.

Features

• Allows random-access to chunks within a query.
• Can iterate through all chunks within a query.
• Can be used for bulk-processing of resources.
• Can also be used for pagination of resources.

Examples

Enumerate over all chunks, 20 resources per-chunk:

require 'dm-chunked_query'

MyModel.each_chunk(20) do |chunk|
  chunk.each do |resource|
    # ...
  end
end

Get the 5th chunk, containing 10 resources:

MyModel.all(:foo => 'bar').chunks(10)[5]

Process records in batches:

MyModel.batch(100) do |resource|
  # ...
end

Requirements

• dm-core ~> 1.0
• dm-aggregates ~> 1.0

Install

$ gem install dm-chunked_query

Copyright

Copyright (c) 2011 Hal Brodigan

See {file:LICENSE.txt} for details.