Mongoose / MongoDb，如何针对另一个模型验证ID数组

I have 2 moongose Schema:

我有2个moongose架构:

var Schema2 = new Schema({
    creator : { type: String, ref: 'User'},
    schema_name : [{ type: String}],
});

var Schema1 = new Schema({
    creator : { type: String, ref: 'User'},
    schema_ref : [{ type: String, ref: 'Schema2' }],
});
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