Class: Wallaby::IdRegexp

Inherits:
ResourcesRegexp show all
Defined in:
lib/routes/wallaby/id_regexp.rb

Instance Method Summary collapse

Instance Method Details

#execute ⇒ Object

This method works with Map.resources_regexp to complete the constraint restriction in config/routes.rb. This regular expression matches the ids which have all the possible resources names in front

It looks like ((?<=products/)|(?<=orders/)|(?<=order/items/)|...|(?<!.))[^/]+:

  • (?<=products/) is a positive lookbehind assertion, it means the ids must have products/ in front of itself, but the match data won't include products/. it matches string e.g. /admin/products/1, and the match data is 1.
  • (?<!.) is a negative lookbehind assertion, it means the ids must have nothing in front of itself. it matches string e.g. 1, and the match data is 1. this is required for URL helper when :id param is given, e.g. resources_path(action: 'show', resources: 'products', id: 1)
  • [^/]+ is to match id. id can be anything as long as it doesn't contain | character.


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# File 'lib/routes/wallaby/id_regexp.rb', line 19

def execute
  Regexp.new("    (\n      \#{resources_sources.map { |resources| \"(?<=\#{resources}/)\" }.join('|')} # all the possible resources names in front of the id\n      |(?<!.) # nothing is in front of the id, this is needed by URL helpers\n    )\n    [^/]+ # id\n  REGEXP\nend\n", Regexp::EXTENDED)