How to Create Nested Level Map Schema Structure in MongoDB - mongodb

Question

I was trying to create an object structure with dynamic year and months inside it & followed by data inside each month.
My expectation
{
"2022": {
"january": {
"cards": [
{
"name":"Card Name",
"amount":100,
"date": "2021-07-06T20:30:00.000Z"
}
]
},
"february": {
"cards": [
{
"name":"Card Name",
"amount":100,
"date": "2021-07-06T20:30:00.000Z"
}
]
}
},
"2023": {
"March": {
"cards": [
{
"name":"Card Name",
"amount":100,
"date": "2021-07-06T20:30:00.000Z"
}
]
}
},
}
I have found one level on the map scheme
const DynamicSchema = new Schema({
year: {
type: Map,
of: String,
}
});
I was able to create this ✅
{
"year": {
"2022": "test"
}
}
When trying with the below schema but ended up with an error❌
const DynamicSchema = new Schema({
year: {
type: Map,
of: [Map],
month: {
type: Map,
of: [Map],
}
}
});
Request payload:
{
"year": {
"2022": {
"month": "34"
}
}
}
"error": "Cast to string failed for value "{ month: '34' }" (type Object) at path "year.$*""
Is my structure possible with MongoDB or not? if yes any hint would be helpful

Answer 1

Your payload itself is wrong:
{
"year": {
"2022": {
"month": "34"
}
}
}
You have defined your schema like this:
const DynamicSchema = new Schema({
year: {
type: Map,
of: [Map],
month: {
type: Map,
of: [Map],
}
}
});
Notice that month is defined as a map here. However, you are passing a string for it 34, in your payload. So, the conversion of 34 to map fails, hence you get the error. Try sending a map, in your payload:
{
"year": {
"2022": {
"month": {
"Jan": "34"
}
}
}
}