Can logstash get the type of field?

[WangXiangUSTC]

OK, below is the problem I met.

How to save different type in one field?

I send logs to logstash, and then output to elasticsearch. the log is json type.for example： some like this: {"time":"2015-09-22:08:11:22", request:{"url":"192.168.0.1/test","user":"xiang"}} and others maybe: {"time":"2015-09-22:08:11:22", request:{"url":"192.168.0.1/test","user":{"name":"xiang","age":20}}} In my logstash config file: filter { json { source => "message" } } so , after deal with the first log, the type of "user" will be string in elasticsearch, but when deal with the…

so, I want to get the type of the field. for example, there are two different type log but with same field:
{"url":"192.168.0.1/test","user":"xiang"}}
{"url":"192.168.0.1/test","user":{"name":"xiang","age":20}}

then I use filter{ { json { source => "message" } } in logstash.
If the type of "user" is string , I save the value in field "user_name", if not ,save the value in field "user".
Do you have any suggest?