MongoDB 将一个 $jsonSchema 链接到另一个 $jsonSchema

Question

我有两个具有 1 对 N 关系的模式。一个是书，另一个是作者。

我在下面创建了三个文件名：book.js、genre.js 和 author.js。如您所见，我在书中引用了其他文件中的流派和作者。

author: {
               $ref: "./models/author.js"
            },

和

"genre" : {
               $ref: "./models/genre.js",
               description: "must be a string and is required"
        }

但是，当我在 mongo> 中发出该命令时，我得到以下信息：

{
"ok" : 0,
"errmsg" : "$jsonSchema keyword '$ref' is not currently supported",
"code" : 9,
"codeName" : "FailedToParse"

}

我想知道我该怎么做？

// book.js
var book = {
   validator: {
      $jsonSchema: {
         bsonType: "object",
         required: [ "title", "author", "summary", "isbn", "genre" ],
         properties: {
            title: {
               bsonType: "string",
               description: "must be a string and is required"
            },
            author: {
               $ref: "./models/author.js"
            },
            isbn: {
               bsonType: "int",
               minimum: 2017,
               maximum: 3017,
               exclusiveMaximum: false,
               description: "must be an integer in [ 2017, 3017 ] and is required"
            },
            "summary" : {
               bsonType: "string",
               description: "must be a string and is required"
            },
            "genre" : {
               $ref: "./models/genre.js"
            }
         }
      }
   }
};

module.exports = book;

//genre.js
var genre = {
   validator: {
      $jsonSchema: {
         bsonType: "object",
         required: [ "name"],
         properties: {
            first_name: {
               bsonType: "string",
               size: 100,
               description: "must be a string and is required"
            },
            url: {
               bsonType: "string",
               minLength:3,
               maxLength:20,
               description: "must be a string and size between [3, 100] is not required"
            }
        }
      }
   }
};
module.exports = genre;

//author.js
var Author = {
   validator: {
      $jsonSchema: {
         bsonType: "object",
         required: [ "first_name", "family_name" ],
         properties: {
            first_name: {
               bsonType: "string",
               maxLength:100,
               description: "must be a string and is required"
            },
            family_name: {
               bsonType: "string",
               maxLength:100,
               description: "must be a string and is not required"
            },
            date_of_birth: {
               bsonType: "int",
               minimum: 0,
               maximum: 2018,
               exclusiveMaximum: false,
               description: "must be an integer in [ 0, 3017 ] and is required"
            },
            date_of_death: {
               bsonType: "int",
               minimum: 0,
               maximum: 2018,
               exclusiveMaximum: false,
               description: "must be an integer in [ 0, 2018 ] and is required"
            }
         }
      }
   }
};
module.exports = Author;

手册参考似乎不起作用：

$jsonSchema: {
         bsonType: "object",
         required: [ "title", "author_id", "summary", "isbn", "genre" ],
         properties: {
            title: {
               bsonType: "string",
               description: "must be a string and is required"
            },
            author_id: {
               bsonType: ObjectId(),
               description: "must be a string and is required"
            },
            isbn: {

作为

{
    "ok" : 0,
    "errmsg" : "$jsonSchema keyword 'bsonType' must be either a string or an array of strings",
    "code" : 14,
    "codeName" : "TypeMismatch"
}

Answer 1

"$jsonSchema keyword '$ref' is not currently supported",

根据您遇到的错误消息，JSON Schema 的实现（在 MongoDB 4.0 中）不支持引用 ($ref)。由于 $jsonSchema 正在数据库服务器上进行验证，因此相对文件路径不合适；您应该改为内联所需的模式验证规则。

如果您想要更大的灵活性，您可以寻找可在您的应用程序代码中使用的验证库。 NPM 上有几个 JSON 模式包以及替代方法，例如对象文档映射器（例如，Mongoose）。

It seems the Manual References does not work
     bsonType: ObjectId(),

此处的 ObjectId() 用法无效 JSON。您需要使用 BSON type 指定字符串值：bsonType: "objectId".

有关详细信息，请参阅您服务器版本的 MongoDB 文档中的 $jsonSchema Extensions and Omissions。

Answer 2

非常感谢。 bsonType："objectId"。老实说，我不喜欢使用 Mongoose。使用手动引用：

original_author_id = ObjectId()

db.author.insert({ "_id": original_author_id, first_name: "ghadamali", family_name: "sarami", date_of_birth：NumberInt(1944) }); original_genre_id = ObjectId()

db.genre.insert({ "_id": original_genre_id, 姓名："action", url: "www.action.com" });

db.book.insert({

title:"az range gol",
author_id: original_author_id, 
summary: "shekle senasi shahname", 
isbn: NumberInt(12312), 
genre:original_genre_id

});

MongoDB 将一个 $jsonSchema 链接到另一个 $jsonSchema

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