没有名称的 Avro Schema 数组

Question

问题 1

我想知道以下架构对于 Avro 架构是否有效。请注意，字段数组的第一个对象中缺少名称。

{
  "name": "AgentRecommendationList",
  "type": "record",
  "fields": [
      {
          "type": {
              "type": "array",
              "items": {
                  "name": "friend",
                  "type": "record",
                  "fields": [
                      {
                          "name": "Name",
                          "type": "string"
                      },
                      {
                          "name": "phoneNumber",
                          "type": "string"
                      },
                      {
                          "name": "email",
                          "type": "string"
                      }
                  ]
              }
          }
      }
  ]
}

实际上是针对以下类型的数据设计的

[
        {
            "Name": "1",
            "phoneNumber": "2",
            "email": "3"
        },
        {
            "Name": "1",
            "phoneNumber": "2",
            "email": "3"
        },
        {
            "Name": "1",
            "phoneNumber": "2",
            "email": "3"
        }
 ]

根据下面的阅读，似乎不允许这样没有名称的数组

There is no way to define and avro schema with an array without a field name.

https://avro.apache.org/docs/current/spec.html#schema_complex

name: a JSON string providing the name of the field (required), and

我怀疑以下是正确的

{
  "name": "AgentRecommendationList",
  "type": "record",
  "fields": [
      {
          "name": "friends",
          "type": {
              "type": "array",
              "items": {
                  "name": "friend",
                  "type": "record",
                  "fields": [
                      {
                          "name": "Name",
                          "type": "string"
                      },
                      {
                          "name": "phoneNumber",
                          "type": "string"
                      },
                      {
                          "name": "email",
                          "type": "string"
                      }
                  ]
              }
          }
      }
  ]
}

并且它应该有如下数据，才能成功进行 avro 转换

{
  "friends": [
      {
          "Name": "1",
          "phoneNumber": "2",
          "email": "3"
      },
      {
          "Name": "1",
          "phoneNumber": "2",
          "email": "3"
      },
      {
          "Name": "1",
          "phoneNumber": "2",
          "email": "3"
      }
  ]
}

问题 2

以下架构是否有效？这在第一个示例中以没有名称的数组为目标...

{
  "name": "AgentRecommendationList",
  "type": "array",
  "items": {
      "name": "friend",
      "type": "record",
      "fields": [
          {
              "name": "Name",
              "type": "string"
          },
          {
              "name": "phoneNumber",
              "type": "string"
          },
          {
              "name": "email",
              "type": "string"
          }
      ]
   }
}

如果有人能证实我的理解，我将不胜感激...谢谢！

Answer 1

对于问题 1...

你写的都是对的。正如您提到的，第一个模式无效，因为记录中的每个字段都需要有一个 name。更正后的架构有效且更正后的数据适用于更新后的架构。

对于问题 2...

问题二中的架构有效，但 AgentRecommendationList 名称将被忽略。数组没有名称。看完问题一中的示例后，这听起来可能很奇怪，但在这些示例中，name 是 field 规范的一部分，而不是数组。

没有名称的 Avro Schema 数组

Avro Schema array without name

avro

问题 1

问题 2