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sfilatov/named_scopes.rb

Created August 11, 2011 12:55
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Object#chain
Raw
named_scopes.rb
# sort by price after sort by date if active projects listed
collection.sort_by_date_asc.chain(|c| c.active.sort_by_price_asc if params[:active]).sort_by_customer_name_desc
Raw
object_ext.rb
class Object
# obj.chain{|x|...} => obj or block result
#
#
# Yields <code>x</code> to the block, and then returns <code>x</code>.
# The primary purpose of this method is to 'tap into' method chain
# in order to modify object or return another object
#
# obj = 100
# obj.chain{|object| object.is_a?(Array) ? object : [object] } => [100]
# obj.chain{|object| [object] unless object.is_a?(Array) } => [100]
# obj.chain => 100
#
def chain
return self unless block_given?
yield(self) || self
end
end
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