Mongoose Schema with nested optional object with required fields

Question

I'd like to create a Mongoose Schema that validates the object below with the following restrictions:

• field2 is optional (0-1 relationship),
• field2.type is required if field2 exists (notice that the name of the field is "type" as mongoose reserved word for type definitions),
• field2 and the the base object must be in the same document.

Code example

{
  field1: "data",
  field2: {
    type: "data",
    data: "data"
  }
}

Thanks in advance.

Answer 1

You can refer to this answer:

{
  field1: "your data",
  field2: {
    type: {
      "your data"
    },
    required: false
  }
}

So an example would be:

{
  field1: String,
  field2: {
    type: {
      nestedField1: { type: String, required: true },
      nestedField2: String
    },
    required:false
  }
}

If field2 exists, then nestedField1 would be required.