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module CouchPotato module View # Used to query views (and create them if they don't exist). Usually you won't have to use this class directly. Instead it is used internally by the CouchPotato::Database.view method. class ViewQuery def initialize(couchrest_database, design_document_name, view_name, map_function, reduce_function = nil) @database = couchrest_database @design_document_name = design_document_name @view_name = view_name @map_function = map_function @reduce_function = reduce_function end def query_view!(parameters = {}) update_view unless view_has_been_updated? begin query_view parameters rescue RestClient::ResourceNotFound update_view retry end end private def update_view design_doc = @database.get "_design/#{@design_document_name}" rescue nil original_views = design_doc && design_doc['views'].dup view_updated unless design_doc.nil? design_doc ||= empty_design_document design_doc['views'][@view_name.to_s] = view_functions @database.save_doc(design_doc) unless original_views == design_doc['views'] end def view_functions {'map' => @map_function, 'reduce' => @reduce_function} end def empty_design_document {'views' => {}, "_id" => "_design/#{@design_document_name}", "language" => "javascript"} end def view_has_been_updated? updated_views[[@design_document_name, @view_name]] end def view_updated updated_views[[@design_document_name, @view_name]] = true end def updated_views @@updated_views ||= {} @@updated_views end def query_view(parameters) @database.view view_url, parameters end def view_url "#{@design_document_name}/#{@view_name}" end end end end
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5 entries across 5 versions & 1 rubygems