allOf项的属性可以包含另一个allOf项定义的$ref吗？

Question

“#/allof/1/properties/body/properties/foo”是一个有效的$ref吗？
正如本文解释$ref用法时所述，看起来应该是。
但是AJV和https://www.jsonschemavalidator.net/似乎不同意。

尝试使用一个普通的JSON指针，它似乎绝对是可能的：https://repl.it/repls/wretchedspiritedmammoth

这就是我正在测试的模式。

{
  "$schema": "http://json-schema.org/draft-06/schema#",
  "type": "object",
  "allOf": [
    {
      "$schema": "http://json-schema.org/draft-06/schema#",
      "$id": "http:/example.org/example.schema.json",
      "type": "object",
      "properties": {
        "type": {
          "type": "string"
        },
        "body": {
          "type": "object"
        }
      },
      "required": [
        "type",
        "body"
      ]
    },
    {
      "properties": {
        "body": {
          "$schema": "http://json-schema.org/draft-06/schema#",
          "$id": "http://example.org/foo.schema.json",
          "type": "object",
          "properties": {
            "foo": {
              "type": "number",
              "minimum": 1
            },
            "bar": {
              "$ref": "#/allOf/1/properties/body/properties/foo"
            }
          },
          "required": [
            "foo",
            "bar"
          ]
        }
      }
    }
  ]
}

无法解析id http://example.org/foo.schema.json中的引用#/allof/1/properties/body/properties/foo“

Answer 1

尽管在子模式中设置了$id，但模式基本上是正确的。

“$id”关键字定义架构的URI，以及解析架构中其他URI引用所依据的基URI。

https://datatracker.ietf.org/doc/html/draft-handrews-json-schema-00#section-9.2

"bar": {
  "$ref": "#/properties/foo"
}

从另一个属性模式直接引用一个属性模式是有效的，但更常见的最佳实践是将这样的模式放在“definitions”关键字下，并让两个属性都引用该位置。为了最大限度地清晰，我建议如下：

{
  "$schema": "http://json-schema.org/draft-06/schema#",
  "type": "object",
  "allOf": [
    {
      "$schema": "http://json-schema.org/draft-06/schema#",
      "$id": "http:/example.org/example.schema.json",
      "type": "object",
      "properties": {
        "type": {
          "type": "string"
        },
        "body": {
          "type": "object"
        }
      },
      "required": [
        "type",
        "body"
      ]
    },
    {
      "properties": {
        "body": {
          "$schema": "http://json-schema.org/draft-06/schema#",
          "$id": "http://example.org/foo.schema.json",
          "type": "object",
          "properties": {
            "foo": {
              "$ref": "#/definitions/whateverYouWantToCallIt"
            },
            "bar": {
              "$ref": "#/definitions/whateverYouWantToCallIt"
            }
          },
          "required": [
            "foo",
            "bar"
          ]
        }
      },
      "definitions": {
        "whateverYouWantToCallIt": {
          "type": "number",
          "minimum": 1
        }
      }
    }
  ]
}