如何创建允许为特定日期插入唯一值的mongoose架构

const mongoose = require('mongoose');
const { Schema } = mongoose;

const uniqueValueSchema = new Schema({
  date: {
    type: Date,
    unique: true
  },
  value: String
});

const UniqueValue = mongoose.model('UniqueValue', uniqueValueSchema);

const uniqueValue = new UniqueValue({
  date: new Date(),
  value: 'Some value'
});

uniqueValue.save((err) => {
  if (err) {
    console.error(err);
  } else {
    console.log('Unique value inserted successfully.');
  }
});