Reporting on a single collection via a MongoDB database

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1

After installing metabase, I'm starting to love this software but I'm also hitting a few walls. This might be a stupid question but I haven't yet found a way to it the gui, so far.

Given a mongoDB of metrics for software builds how can I tabulate data from just one collection (build) only.

Each collection in the db looks something like:

db.database.find().pretty()
{
"_id" : ObjectId("5d080a131c387759ce1a6b1f"),
"target" : "Build_Target_A",
"build-tag" : "190616",
"date" : "Tue Apr 16 10:11:36 2019",
"hierarchy" : {
"level_1A" : "499.4035",
"level_1B" : "1022168.4899",
"level_1C" : "4616.3981",
"level_1D" : "4517.0497",
"level_1E" : "1229678.3424"
},
"optimization_groups" : {
"grp_1243" : {
"best" : "+0.076",
"sum" : "0",
"counter1" : "0",
"counter2" : "4"
},
"grp_442" : {
"best" : "-13.162",
"sum" : "-6510",
"counter1" : "1665",
"counter2" : "22"
},
"grp_23345" : {
"best" : -107.945,
"sum" : -303250,
"counter1" : 8786,
"counter2" : "32"
}
},
"primitives" : {
"ClassA" : {
"count" : 125444,
"area" : 1017409.32
},
"ClassB" : {
"count" : 365555,
"area" : 6066699.52
},
"ClassC" : {
"count" : 176,
"area" : 1261744.76
}
}
}

If I filter on an ID, ask for the raw data, and choose a few of the nested elements to show, I get the raw numbers but all three table entries have the same column name ("Count"). Also it doesn't look the row has been named (it should really follow the id, in this example). Hence, I can't really apply any visualization.

If this is a GUI limitation, is there a good reference for writing the queries in the native format (mongoDB in my case)?

Alternatively, Is there a better schema for the input, maybe?

2

Here's the results I mentioned, btw

image
image1579×355 24.5 KB

3

Hi @Anton
Which version of Metabase?
I don’t know MongoDB, but there’s a few issues open about nested data:
https://github.com/metabase/metabase/issues?q=is%3Aissue+label%3ADatabase%2FMongo+nested
So I don’t know if you’re limited by the GUI, but using Native Query is just regular MongoDB code, so you should be able to make regular queries.
If you need help with writing queries, I would recommend looking at stackoverflow.com

4

Hi @flamber, thanks for the reply. I’m using version v0.32.8 of metabase (running on centos linux).

I think the mongo query is working for me here. That table give me three numbers extracted from the nexted data based on whatever db path I specify. My problem is getting metabase to visualize the data. Most options but ‘number’ and ‘table’ are grayed out.

What form does the data need to be in to plot, say a pie chart of those three numbers?

5

@Anton
As I don’t know MongoDB, then it’s hard to give a precise answer, but you need to flatten the result, so Metabase has simple (not nested) data to work with.