Parsing error with `Rails.application.config.filter_parameters`

[rubendinho]

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ActiveSupport::Notifications is throwing an exception, related to how this gem parses certain filtered objects.

To replicate, add the variables param to your list of filtered params config like so.

# config/initializers/filter_parameter_logging.rb

Rails.application.config.filter_parameters += [
  :variables
]

Then making a GraphQL query will result in

Started POST "/v1/graphql" for 127.0.0.1 at 2022-03-02 12:34:55 -0600
Processing by API::GraphQLController#create as JSON
Could not log "start_processing.action_controller" event. JSON::ParserError: 451: unexpected token at 'FILTERED]' ...

This is what the output looks like without the graphql-rails_logger turned on:

Started POST "/v1/graphql" for 127.0.0.1 at 2022-03-02 12:38:57 -0600
Processing by API::GraphQLController#create as JSON

Parameters:
{"query"=>"{\n  profile {\n    id\n  }\n}", "variables"=>"[FILTERED]", "graphql"=>{"query"=>"{\n  profile {\n    id\n  }\n}", "variables"=>"[FILTERED]"}}