Add a to_extjs function to any Sequel Dataset, it will generate json that is consumable by the ExtJS JsonStore.
Take a look at Sequel::Plugins::ExtJS::DatasetMethods.to_extjs function for more information.
# this will require the Sequel's ExtJS plugin require 'sequel_extjs' # this will add .to_extjs on the Array class, so you can use the same code for datasets and array results # not required, if you don't like additions to the Array class require 'array_extjs' class MyModel < Sequel::Model(:mymodel) is :ExtJS end # now output all MyModel records in a way the JsonStore expects: MyModel.to_extjs # or use any filters before that MyModel.filter(:status => true).to_exts # or limit it for pagination cnt = MyModel.filter(:status => true).count MyModel.filter(:status => true).limit(10,100).to_extjs(cnt) # also give it a block and it will more or less work like a 'map' MyModel.filter(:status => true).to_exts do |rec| rec[:newprop] = "Status is #{rec.status}" rec end