JSON extractor adds "." in field names of nested JSON objects

[the-Pretender]

Problem description

JSON extractor adds "." in field names of nested JSON objects. This is a problem as it is not supported by elasticsearch 2.* hence the fields are missing.

Steps to reproduce the problem

1. Create a Syslog TCP input and send a message containing {"test": {"foo":"bar"}}
2. JSON extractor preview shows "desired" output, but field is never created.

Environment

• Graylog Version: 2.0.0 alpha 3
• Elasticsearch Version: 2.2.0
• MongoDB Version: not applicable
• Operating System: not applicable

[joschi]

@the-Pretender Thanks for reporting this. We've changed the default value for the JSON extractor in d07f06f but it seems that we forgot to update the front end part (https://github.com/Graylog2/graylog2-server/blob/2.0.0-alpha.3/graylog2-web-interface/src/components/extractors/extractors_configuration/JSONExtractorConfiguration.jsx#L27-L30).