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Changed pagination technique used by Collection

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Modified Collection to use the pagination technique described at
http://wiki.apache.org/couchdb/How_to_page_through_results where possible.
This commit is contained in:
John Wood 2009-06-22 08:39:28 -05:00 committed by Matt Aimonetti
parent a0d6204b42
commit 42482a626a
1 changed files with 17 additions and 2 deletions
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19
lib/couchrest/mixins/collection.rb
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@ -110,7 +110,8 @@ module CouchRest
# See Collection.paginate
def paginate(options = {})
page, per_page = parse_options(options)
results = @database.view(@view_name, @view_options.merge(pagination_options(page, per_page)))
results = @database.view(@view_name, pagination_options(page, per_page))
remember_where_we_left_off(results, page)
convert_to_container_array(results)
end
@ -186,7 +187,14 @@ module CouchRest
end
def pagination_options(page, per_page)
{ :limit => per_page, :skip => per_page * (page - 1) }
view_options = @view_options.clone
if @last_key && @last_docid && @last_page == page - 1
view_options.delete(:key)
options = { :startkey => @last_key, :startkey_docid => @last_docid, :limit => per_page, :skip => 1 }
else
options = { :limit => per_page, :skip => per_page * (page - 1) }
end
view_options.merge(options)
end
def parse_options(options)
@ -198,6 +206,13 @@ module CouchRest
def strip_pagination_options(options)
parse_options(options)
end
def remember_where_we_left_off(results, page)
last_row = results['rows'].last
@last_key = last_row['key']
@last_docid = last_row['id']
@last_page = page
end
end
end