GraphQL stops query for child_stops throws error when parent_station column not exists

[landonreed]

Observed behavior

When making a GraphQL query for stops with nested child_stops, the query hits an error if the column does not exist in the stops table.

Expected behavior

There should not be an error thrown when the parent_station field does not exist.

Steps to reproduce the problem

Load a gtfs file with a stops file that has no parent_station column (e.g. sfmta). Run GraphQLMain and make the following query (be sure to include namespace variable).

query stopsQuery(
  $namespace: String
) {
  feed (namespace: $namespace) {
    stops {
      stop_id
      stop_name
      parent_station
      child_stops {
        stop_id
        stop_name
      }
    }
  }
}

Notes on configuration and files required to reproduce the issue

N/A

[landonreed]

🎉 This issue has been resolved in version 4.3.2 🎉

The release is available on GitHub release

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