如何使可選的字段基於Mongoose中的其他字段？

Question

我想在Mongoose模式中設置可選字段。我的Log模式。

var logSchema = new Schema({ 
    logType: { 
     type: String, 
     enum: ['user', 'lead', 'knowledgecenter'], 
     required: true 
    }, 
    userLog: { 
     name: { 
      type: String, 
      required: true 
     }, 
     userId: { 
      type: Schema.Types.ObjectId, 
      required: true 
     } 
    }, 
    leadLog: { 
     title: { 
      type: String, 
      required: true 
     }, 
     leadId: { 
      type: Schema.Types.ObjectId, 
      required: true 
     } 
    } 
}); 

我想插入上面Log架構文檔或者與{logType:'user',userLog:{userId:'5fcJFjslkka4lsdk'}}或{logType:'lead',leadLog:{leadId:'5fcJFjslkka4lsdk'}}。

但此時貓鼬ValidatorError: Path required錯誤。

Answer 1

而不是將required設置爲true您可以將其設置爲只在需要時才返回true的函數。

這應該做的伎倆：

var logSchema = new Schema({ 
    logType: { 
     type: String, 
     enum: ['user', 'lead', 'knowledgecenter'], 
     required: true 
    }, 
    userLog: { 
     name: { 
      type: String, 
      required: function() { return this.logType === 'user'; } 
     }, 
     userId: { 
      type: Schema.Types.ObjectId, 
      required: function() { return this.logType === 'user'; } 
     } 
    }, 
    leadLog: { 
     title: { 
     type: String, 
     required: function() { return this.logType === 'lead'; } 
     }, 
     leadId: { 
     type: Schema.Types.ObjectId, 
     required: function() { return this.logType === 'lead'; } 
     } 
    } 
});