to_json is used on request, but JSON.generate is used on blank_renderer which produces inconsistent results

[davidbarratt]

When a request is made to https://github.com/airbnb/hypernova the to_json method is used:

hypernova-ruby/lib/hypernova/faraday_request.rb

Line 8 in ce24970

request.body = payload[:body].to_json

but when the service does not respond, the data is serialized with JSON.generate

hypernova-ruby/lib/hypernova/blank_renderer.rb

Line 24 in ce24970

JSON.generate(data).gsub(/&/, '&').gsub(/>/, '>')

Theoretically this should produce an identical result, but we have seen that this does not.

Could the latter instance be updated to use to_json as well?

[ljharb]

In what way does it not?

[davidbarratt]

In what way does it not?

Objects that aren't hashes will return the to_s value.

Indeed, the documentation says:

JSON.generate only allows objects or arrays to be converted to JSON syntax. to_json, however, accepts many Ruby classes even though it acts only as a method for serialization

[ljharb]

So a fix could be JSON.generate(obj.respond_to?(:to_json) ? data.to_json : data)? That seems reasonable.

[davidbarratt]

So a fix could be JSON.generate(obj.respond_to?(:to_json) ? data.to_json : data)? That seems reasonable.

I believe to_json returns a string, so I don't think passing it into JSON.generate() would work. If we are calling to_json exclusively elsewhere, it seems like it could simply be changed to:

data.to_json.gsub(/&/, '&').gsub(/>/, '>') 

right?

[ljharb]

ah right I’m thinking of .as_json