Question

似乎jsonschema 3.0.1版不接受使用$ refs的多阶段模式（虽然它与jsonschema 2.6.0版一起使用）。

仅因为我的代码将在具有不同环境的不同计算机上运行，我必须使其在多个模块版本下工作。

我在https://www.jsonschemavalidator.net/上验证了我的json（感谢在另一个StackOverflow问题中找到此链接）。

我尝试过：

  jsonschema -i myjson.json noRefs.schema.json      --> 2.6.0 = OK, 3.0.1 OK
  jsonschema -i myjson.json usingRefs.schema.json   --> 2.6.0 = OK, 3.0.1 KO

注意： * .schema.json都适用于https://www.jsonschemavalidator.net/

文件myjson.json：

{
  "TopProperty" : {
    "LowerProperty" : {"toto" : "plop"}
  }
}

文件noRefs.schema.json：

{
  "type": "object",

  "properties": {
    "TopProperty": {"$ref": "#/schemaTopProperty"}
  },

  "schemaTopProperty": {
    "$id": "schemaTopProperty",
    "type": "object",

    "properties": {
      "LowerProperty": {
        "type": "object",
        "properties": {
          "toto": {"type": "string"}
        }
      }
    }
  }
}

usingRefs.schema.json的文件：

{
  "type": "object",

  "properties": {
    "TopProperty": {"$ref": "#/schemaTopProperty"}
  },

  "schemaTopProperty": {
    "$id": "schemaTopProperty",
    "type": "object",

    "properties": {
      "LowerProperty": {
        "type": "object",
        "properties": {
          "toto": {"$ref": "#/justAString"}
        }
      }
    }
  },

  "justAString": {
    "$id": "justAString",
    "type": "string"
  }

}

收到错误消息：

Traceback (most recent call last):                                                                                                         
  File "/usr/bin/jsonschema", line 11, in <module>                                                                                         
    sys.exit(main())                                                                                                                       
  File "/usr/lib/python2.7/site-packages/jsonschema/cli.py", line 67, in main                                                              
    sys.exit(run(arguments=parse_args(args=args)))                                                                                         
  File "/usr/lib/python2.7/site-packages/jsonschema/cli.py", line 78, in run                                                               
    for error in validator.iter_errors(instance):                                                                                          
  File "/usr/lib/python2.7/site-packages/jsonschema/validators.py", line 323, in iter_errors                                               
    for error in errors:                                                                                                                   
  File "/usr/lib/python2.7/site-packages/jsonschema/_validators.py", line 274, in properties                                               
    schema_path=property,                                                                                                                  
  File "/usr/lib/python2.7/site-packages/jsonschema/validators.py", line 339, in descend                                                   
    for error in self.iter_errors(instance, schema):
  File "/usr/lib/python2.7/site-packages/jsonschema/validators.py", line 323, in iter_errors
    for error in errors:
  File "/usr/lib/python2.7/site-packages/jsonschema/_validators.py", line 251, in ref
    for error in validator.descend(instance, resolved):
  File "/usr/lib/python2.7/site-packages/jsonschema/validators.py", line 339, in descend
    for error in self.iter_errors(instance, schema):
  File "/usr/lib/python2.7/site-packages/jsonschema/validators.py", line 323, in iter_errors
    for error in errors:
  File "/usr/lib/python2.7/site-packages/jsonschema/_validators.py", line 274, in properties
    schema_path=property,
  File "/usr/lib/python2.7/site-packages/jsonschema/validators.py", line 339, in descend
    for error in self.iter_errors(instance, schema):
  File "/usr/lib/python2.7/site-packages/jsonschema/validators.py", line 323, in iter_errors
    for error in errors:
  File "/usr/lib/python2.7/site-packages/jsonschema/_validators.py", line 73, in items
    for error in validator.descend(item, items, path=index):
  File "/usr/lib/python2.7/site-packages/jsonschema/validators.py", line 339, in descend
    for error in self.iter_errors(instance, schema):
  File "/usr/lib/python2.7/site-packages/jsonschema/validators.py", line 323, in iter_errors
    for error in errors:
  File "/usr/lib/python2.7/site-packages/jsonschema/_validators.py", line 274, in properties
    schema_path=property,
  File "/usr/lib/python2.7/site-packages/jsonschema/validators.py", line 339, in descend
    for error in self.iter_errors(instance, schema):
  File "/usr/lib/python2.7/site-packages/jsonschema/validators.py", line 323, in iter_errors
    for error in errors:
  File "/usr/lib/python2.7/site-packages/jsonschema/_validators.py", line 247, in ref
    scope, resolved = validator.resolver.resolve(ref)
  File "/usr/lib/python2.7/site-packages/jsonschema/validators.py", line 734, in resolve
    return url, self._remote_cache(url)
  File "/usr/lib/python2.7/site-packages/functools32/functools32.py", line 400, in wrapper
    result = user_function(*args, **kwds)
  File "/usr/lib/python2.7/site-packages/jsonschema/validators.py", line 744, in resolve_from_url
    raise exceptions.RefResolutionError(exc)
jsonschema.exceptions.RefResolutionError: unknown url type: schemaTopProperty

Answer 1

编辑：我之前的答案不正确。

TL; DR：您有两个选择：

从定义中删除$id属性
在#/属性中使用$id（例如：{"$id": "#/justAString"}）

详细信息：

问题在于ID，直到草稿04为止，$ref和$id都以票面价值对待，没什么特别的，但是从草稿06开始，这些是uri-reference ，在这种情况下，解析到{"$id": "schemaTopProperty"}时，不再{"$ref": "justAString"}在根结构中寻找片段justAString，而是在/justAString下寻找schemaTopProperty主机，这是一个远程参考。

因此，我的解决方案可以删除导致定义为URL（实际上是主机）的$id，或者将$id定义为当前架构中的片段。

多阶段$ ref不适用于jsonschema版本3.0.1

1 个答案: