我正在尝试在用户注册时强制使用“唯一电子邮件地址”。但是猫鼬似乎并没有遵循我的架构中的unique: true标志。

// NPM Packages
import * as mongoose from 'mongoose';
import * as bcrypt from 'bcrypt';

export const UserSchema = new mongoose.Schema(
  {
    firstName: {
      type: String,trim: true,required: [true,'Please enter First Name'],},lastName: {
      type: String,'Please enter Last Name'],email: {
      type: String,match: [
        /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/,'Please add a valid email address.',],'Please enter Email Address'],unique: true,lowercase: true,password: {
      type: String,'Please enter a password'],minlength: [6,'Password must be at least 6 characters'],select: false,{ timestamps: true },);

// Encrypt User Password
UserSchema.pre('save',async function(next) {
  const salt = await bcrypt.genSalt(10); // Recommended in bcryptjs doc
  this.password = await bcrypt.hash(this.password,salt);
});