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Contents
require "datagrid/columns"
module Datagrid
class OrderUnsupported < StandardError
end
module Ordering
def self.included(base)
base.extend ClassMethods
base.class_eval do
include Datagrid::Columns
datagrid_attribute :order do |value|
unless value.blank?
value = value.to_sym
column = column_by_name(value)
unless column
order_unsupported(value, "no column #{value} in #{self.class}")
end
unless column.order
order_unsupported(
name, "#{self.class}##{name} don't support order"
)
end
value
else
nil
end
end
datagrid_attribute :descending do |value|
Datagrid::Utils.booleanize(value)
end
alias descending? descending
end
base.send :include, InstanceMethods
end # self.included
module ClassMethods
def order_unsupported(name, reason)
raise Datagrid::OrderUnsupported, "Can not sort #{self.inspect} by ##{name}: #{reason}"
end
end # ClassMethods
module InstanceMethods
def assets
result = super
if self.order
column = column_by_name(self.order)
result = apply_order(result, column)
end
result
end
private
def apply_order(assets, column)
order = column.order
if self.descending?
if column.order_desc
driver.asc(assets, column.order_desc)
else
driver.desc(assets, order)
end
else
driver.asc(assets, order)
end
end
end # InstanceMethods
end
end
Version data entries
11 entries across 11 versions & 1 rubygems