Push to array based on other attributes - arrays

Question

Object structure (example only, there are thousands of callbacks in one object):
{
"_id" : ObjectId("5ce82dd1eed5a17f33ec025a"),
"id" : "AAA",
"pac" : "",
"callbacks" : [
{
"_id" : ObjectId("5ce82e29eed5a17f33ec0287"),
"timestamp" : 1558720040,
"type" : "data_bidir",
"seqNumber" : 49,
"messages" : [
{
"isCode" : true,
"_id" : ObjectId("5ce82e29eed5a17f33ec0294"),
"key" : "action",
"value" : "extra_long_press"
},
{
"isCode" : false,
"_id" : ObjectId("5ce82e29eed5a17f33ec0293"),
"key" : "version",
"value" : "6"
},
{
"isCode" : false,
"_id" : ObjectId("5ce82e29eed5a17f33ec0292"),
"key" : "firmware",
"value" : "0.45"
}
],
"created" : ISODate("2019-05-24T17:47:21.476Z")
},
{
"_id" : ObjectId("5ce82e42eed5a17f33ec0295"),
"timestamp" : 1558720040,
"type" : "service_geoloc",
"seqNumber" : 49,
"messages" : [
{
"isCode" : true,
"_id" : ObjectId("5ce82e42eed5a17f33ec029b"),
"key" : "lqi",
"value" : "Good"
},
{
"isCode" : false,
"_id" : ObjectId("5ce82e42eed5a17f33ec029a"),
"key" : "latitude",
"value" : "50.67593721530616"
},
{
"isCode" : false,
"_id" : ObjectId("5ce82e42eed5a17f33ec0299"),
"key" : "longitude",
"value" : "14.03118116624828"
},
{
"isCode" : false,
"_id" : ObjectId("5ce82e42eed5a17f33ec0298"),
"key" : "radius",
"value" : "8514"
},
{
"isCode" : true,
"_id" : ObjectId("5ce82e42eed5a17f33ec0297"),
"key" : "da_source",
"value" : "2"
},
{
"isCode" : true,
"_id" : ObjectId("5ce82e42eed5a17f33ec0296"),
"key" : "da_status",
"value" : "1"
}
],
"created" : ISODate("2019-05-24T17:47:46.547Z")
}
]
}
I need to push object to all messages only if a) callbacks.type is "service_geoloc" and b) if messages contains key = da_source and value = 2 (in sample data - the second callback would be affected).
The condition a) is easily managed by arrayFilters:
db.getCollection("devices").updateMany(
{ id: 'AAA'},
{ $push: {
"callbacks.$[c].messages" : {
$each: [{key: "action", value: "atlas_position_network", isCode: true}],
$position: 0
}
}
},
{ arrayFilters: [{"c.type": "service_geoloc"}], multi: true}
)
But I cannot figure out how to apply the condition b). I also tried elemMatch - it worked with both conditions but it updated only one message.

Answer 1

I was able to do it in 2 steps. Maybe it is impossible to do it in one step using shell.
Step 1 = push the item into messages array with general value:
db.getCollection("devices").updateMany(
{ id: 'AAA'},
{ $push: {
"callbacks.$[c].messages" : {
$each: [{key: "action", value: "atlas_position_network", isCode: true}],
$position: 0
}
}
},
{ arrayFilters: [{"c.type": "service_geoloc"}], multi: true}
)
Step 2 = Update the value based on other item on fixed position:
db.getCollection('devices').updateMany(
{ id: 'AAA' },
{ $set: { "callbacks.$[c].messages.0.value": "atlas_position_wifi"} },
{ arrayFilters: [{ "c.type": "service_geoloc", "c.messages.5.value": "6", "c.messages.5.key": "da_source" }], multi: true }
)