Define Pathname#as_json

[tricknotes]

Summary

When the Pathname object is converted as JSON,
it should be a string that means itself.

Expected:

>> Pathname.new('/path/to/somewhere.txt').as_json
"/path/to/somewhere.txt"

Actual:

>> Pathname.new('/path/to/somewhere.txt').as_json
{"path"=>"/path/to/somewhere.txt"}

[rails-bot]

r? @sgrif

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[sgrif]

Thanks, but we aren't going to implement this for every type in the standard library without a compelling use case. This seems like a more appropriate patch for Ruby itself.

[chancancode]

I discussed this with @sgrif and I think we can probably merge this. While I agree it seems relatively unlikely to come up in practice, given the symmetry between URI and Pathname, it would feel a bit inconsistent if one works out-of-the-box and the other doesn't.