How to break nested objects and lists into individual events?

dasaed — Fri, 18 Feb 2022 16:07:54 GMT

I have an event with multiple levels of nested objects and lists, that I need to break down into individual events. For example, a single event can look like:

And I need to conver that event into a table like this:

Group_name	Sub_group	Subsubgroup	Some other info …
alpha	alpha1	beta
alpha	alpha1	gamma
alpha	alpha2	a
alpha	alpha2	b
alpha	alpha3	uno

I've tried multiple combinations of mvexpand, table, and stats, but I keep getting erroneous results. The command flatten doesn't seem to work, and I fear I might need some crazy regex to parse all the embedded objects and list of objects, not to mention this is only one event, in reality I would have multiple other groups with their corresponding subgroups and stuff.

Re: How to break nested objects and lists into individual events?

yuanliu — Sat, 19 Feb 2022 09:18:06 GMT

First of all, please post sample data in text, not in screenshot. It is much easier for other people to help.

Secondly, the screenshot shows invalid JSON syntax.

Assuming actual data are conformant, the following should give you the desired outcome

| spath path=group_name | spath output=sub_groups path=group.sub_groups{} | mvexpand sub_groups | spath input=sub_groups path=subgroup | spath input=sub_groups output=subsubgroup path=subsubgroup{} | fields - sub_groups ``` just to clear view, not part of calculation ``` | mvexpand subsubgroup | spath input=subsubgroup | table group_name subgroup team "some other info"

In the above, I didn't bother to rename fields; for example, "team" is subsubgroup, etc. In input data, I assumed that there is a field "some other info" under subsubgroup.

Given test data as follows (which you should have supplied in text):

{"event":"A", "group_name":"alpha", "group":{ "group_name":"alpha", "sub_groups":[ {"subgroup":"alpha1", "subsubgroup": [ {"team":"beta"}, {"team":"gamma", "some other info":"foo"}] }, {"subgroup":"alpha2", "subsubgroup": [ {"team":"a"}, {"team":"b", "some other info":"bar"}] }, {"subgroup": "alpha3", "subsubgroup": [ {"team": "uno", "some other info":"baz"}] } ] } }

output would be

group_name	subgroup	team	some other info
alpha	alpha1	beta
alpha	alpha1	gamma	foo
alpha	alpha2	a
alpha	alpha2	b	bar
alpha	alpha3	uno	baz

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How to break nested objects and lists into individual events?

Re: How to break nested objects and lists into individual events?