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class Object
# Alias of <tt>to_s</tt>.
def to_param
to_s
end
end
class NilClass
# Returns +self+.
def to_param
self
end
end
class TrueClass
# Returns +self+.
def to_param
self
end
end
class FalseClass
# Returns +self+.
def to_param
self
end
end
class Array
# Calls <tt>to_param</tt> on all its elements and joins the result with
# slashes. This is used by <tt>url_for</tt> in Action Pack.
def to_param
collect { |e| e.to_param }.join '/'
end
end
class Hash
# Returns a string representation of the receiver suitable for use as a URL
# query string:
#
# {name: 'David', nationality: 'Danish'}.to_param
# # => "name=David&nationality=Danish"
#
# An optional namespace can be passed to enclose the param names:
#
# {name: 'David', nationality: 'Danish'}.to_param('user')
# # => "user[name]=David&user[nationality]=Danish"
#
# The string pairs "key=value" that conform the query string
# are sorted lexicographically in ascending order.
#
# This method is also aliased as +to_query+.
def to_param(namespace = nil)
collect do |key, value|
unless (value.is_a?(Hash) || value.is_a?(Array)) && value.empty?
value.to_query(namespace ? "#{namespace}[#{key}]" : key)
else
nil
end
end.compact.sort! * '&'
end
end
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