Push hierarchical array in MongoDB - arrays

Question

I have the following document:
{
"_id":"575322d9585095d9929554ba",
"Level1":{
"Level2":[
{
"Level3a":{
"Level4":{
"Level5":{
"name":"John",
"surname":"Matthew"
}
}
}
},
{
"Level3a":{
"Level4":{
"Level5":{
"name":"Emma",
"surname":"Jackson"
}
}
}
}
]
}
}
I need to insert the new name and surname at Level5. I tried the $push method but I got the error that the dotted field .. is not valid for storage:
db.names.update({ "_id":"575322d9585095d9929554ba" },
{
$push: {
"Level1.Level2":
{ $each: [ { "Level3a.Level4.Level5.name": "Greg" },
{ "Level3a.Level4.Level5.surname": "Cook" }] } } } )
It seems that push does not allow the inserting new data in hierarchical arrays or I am wrong?

Answer 1

There is an issue with your query as $each is used to add multiple values to same array....
As we are going to add only one entry to array we don't need to use $each
so query looks like this:
db.vnenad.update({
"_id" : "575322d9585095d9929554ba"
},
{
$push : {
"Level1.Level2" : {
"Level3a" : {
"Level4" : {
"Level5" : {
"name" : "johnny",
"surname" : "rambo"
}
}
}
}
}
})
as I was debbuging your query I decided to create variable with document to insert inside an array, then it was easier for me to adjust your query - please see below:
var doc = {
"Level3a" : {
"Level4" : {
"Level5" : {
"name" : "johnny",
"surname" : "rambo"
}
}
}
}
db.vnenad.update({
"_id" : "575322d9585095d9929554ba"
},
{
$push : {
"Level1.Level2" : doc
}
})