Mongoose Schema with nested optional object with required fields

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.

---

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.

---

你可能意思是这样的：

var Field2Schema = new mongoose.Schema({
  type: { type: String, required: true },
  data: String
});

var MainSchema = new mongoose.Schema({
  field1: String,
  field2: Field2Schema
});

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