Bugfix for "nested => [:posts]" in ruby 1.9.2

[toastkid]

Bugfix for how the nested parent class is calculated from the :nested option in ruby 1.9.2, which has a different Array#to_s method to previous ruby versions.

Hi Jesse. I've been using your great plugin resource_this for years (thanks!) and have found a problem using it with ruby 1.9.2p0.

When calling resource_this with a nested resource, eg
resource_this :nested => [:reports]
I get an error: "can't convert Symbol into Integer"

I poked around in the plugin code and the problem seems to be how the Array#to_s method is implemented in ruby 1.9.2. In ruby 1.8.7, it behaves like this:

[:reports].to_s
=> "reports"

In ruby 1.9.2 it's more like Array#inspect:

ruby-1.9.2-p0 :001 > [:reports].to_s
=> "[:reports]"

This difference makes the following line go wrong:

/vendor/plugins/resource_this/lib.rb:22
unless options[:nested].nil?
nested = options[:nested].to_s.singularize

as it sets the nested variable to "[:reports]", which screws up subsequent attempts to process it with singularize, camelize etc.

If i change the call to

resource_this :nested => :reports

then it works fine.

I'm not sure why the :nested option was ever an array in the first place but i've changed how nested is calculated to work in ruby 1.9.2p0 and older versions, and also to work with being passed an array containing a symbol or a single symbol: the new line is

    nested                = [options[:nested]].flatten[0].to_s.singularize

Cheers, max