MongoDB: Set the value of array element from values another array - mongodb

Question

I want to create a new array methods[].linkToRegistry[] from methods[].settings[].linkToRegistry, i.e. I go through all the settings[] elements and extract data from the linkToRegistry fields into a new array methods[].linkToRegistry[] . The only condition is to skip empty linkToRegistry[] elements (optional, but desirable). Accordingly, for each methods[] element, the linkToRegistry[] array must be different. But I can only do this:
Source collection:
[
{
"methods": [
{
"settings": [
{
"linkToRegistry": "yes"
}
],
},
{
"settings": [
{
"linkToRegistry": "true"
},
{
"linkToRegistry": "false"
}
],
},
{
"settings": [
{
"someField": "yes"
}
],
},
],
},
{
"methods": [
{
"settings": [
{
"linkToRegistry": "NO"
}
],
},
{
"settings": [
{
"linkToRegistry": ""
}
],
}
],
}
]
The code:
db.collection.update({
"methods.settings.linkToRegistry": {
$exists: true
}
},
[
{
"$set": {
"methods.linkToRegistry": "$methods.settings.linkToRegistry"
}
}
],
{
multi: true
})
Final collection:
[
{
"_id": ObjectId("5a934e000102030405000000"),
"methods": [
{
"linkToRegistry": [
[
"yes"
],
[
"true",
"false"
],
[]
],
"settings": [
{
"linkToRegistry": "yes"
}
]
},
{
"linkToRegistry": [
[
"yes"
],
[
"true",
"false"
],
[]
],
"settings": [
{
"linkToRegistry": "true"
},
{
"linkToRegistry": "false"
}
]
},
{
"linkToRegistry": [
[
"yes"
],
[
"true",
"false"
],
[]
],
"settings": [
{
"someField": "yes"
}
]
}
]
},
{
"_id": ObjectId("5a934e000102030405000001"),
"methods": [
{
"linkToRegistry": [
[
"NO"
],
[
""
]
],
"settings": [
{
"linkToRegistry": "NO"
}
]
},
{
"linkToRegistry": [
[
"NO"
],
[
""
]
],
"settings": [
{
"linkToRegistry": ""
}
]
}
]
}
]
What I want to see:
[
{
"methods": [
{
"linkToRegistry": [
[
"yes"
]
],
"settings": [
{
"linkToRegistry": "yes"
}
]
},
{
"linkToRegistry": [
[
"true",
"false"
]
],
"settings": [
{
"linkToRegistry": "true"
},
{
"linkToRegistry": "false"
}
]
},
{
"linkToRegistry": [],
"settings": [
{
"someField": "yes"
}
]
}
]
},
{
"methods": [
{
"linkToRegistry": [
[
"NO"
]
],
"settings": [
{
"linkToRegistry": "NO"
}
]
},
{
"linkToRegistry": [
[
""
]
],
"settings": [
{
"linkToRegistry": ""
}
]
}
]
}
]
Link:
https://mongoplayground.net/p/vau9JljsjTW
How can i do this?
Thanks a lot in advance!

Answer 1

I'm complite
db.getSiblingDB("ervk_core").getCollection("supervision").find({}).forEach(function (supervision) {
if (supervision.methods instanceof Array) {
supervision.methods.forEach(function (method) {
var linkToRegistry = []
if (method.settings instanceof Array) {
method.settings.forEach(function (setting) {
linkToRegistry.push(setting.linkToRegistry);
});
db.getSiblingDB("ervk_core").getCollection("supervision").updateOne(
{
_id: supervision._id,
methods: method
},
{
'$set':
{
[`methods.$.linkToRegistry`] : linkToRegistry
}
}
);
}
});
}
});