我想自定义Mongoose模型生成的验证消息。
我倾向于不直接对模式对象进行验证（例如，required），因为没有自定义错误消息的自由。

sourceAccountId: {
  type: Schema.ObjectId,
  require: true,
  ref: 'Account'
}

而是执行以下操作。

sourceAccountId: {
  type: Schema.ObjectId,
  ref: 'Account'
}

ConnectionRequestSchema.path('sourceAccountId').required(true, 'Source Account is required.');

当字段具有枚举约束时，我无法找到覆盖默认枚举消息的方法。
下面列出了我的模型，状态验证消息对required正常工作，但对enum不正常。

'use strict';

var _ = require('lodash');

var mongoose = require('mongoose');

var Schema = mongoose.Schema;

var ConnectionRequestSchema = new Schema({
  created_at: { type: Date },
  updated_at: { type: Date },

  sourceAccountId: {
    type: Schema.ObjectId,
    ref: 'Account'
  },

  status: {
    type: String,
    enum: ['pending', 'accept', 'decline'],
    trim: true
  }
});

// ------------------------------------------------------------
// Validations
// ------------------------------------------------------------

ConnectionRequestSchema.path('sourceAccountId').required(true, 'Source Account is required.');
ConnectionRequestSchema.path('status').required(true, 'Status is required.');
//ConnectionRequestSchema.path('status').enum(['pending', 'accept', 'decline'], 'Status is invalid, valid values include [pending, accept, decline]');

// ------------------------------------------------------------
// Save
// ------------------------------------------------------------

ConnectionRequestSchema.pre('save', function (next) {
  var now = new Date().getTime();

  this.updated_at = now;
  if (!this.created_at) {
    this.created_at = now;
  }

  next();
});

module.exports = mongoose.model('ConnectionRequest', ConnectionRequestSchema);