"required" 关键字在 JSON 架构中

Question

我从 http://json-schema.org/examples.html, i want to know if the required keyword can only come at the top level. or it can also come within the properties if there is a property of type object.I could not find any thing related to this in the specification https://datatracker.ietf.org/doc/html/draft-fge-json-schema-validation-00#section-5.4.3 得到了以下架构。

{
    "title": "Example Schema",
    "type": "object",
    "properties": {
        "firstName": {
            "type": "string"
        },
        "lastName": {
            "type": "string"
        },
        "age": {
            "description": "Age in years",
            "type": "integer",
            "minimum": 0
        }
    },
    "required": ["firstName", "lastName"]
}

所以下面的例子是一个有效的模式

{  
   "title":"Example Schema",
   "type":"object",
   "properties":{  
      "firstName":{  
         "type":"string"
      },
      "lastName":{  
         "type":"string"
      },
      "age":{  
         "type":"object",
         "properties":{  
            "minAge":{  
               "type":"number"
            },
            "maxAge":{  
               "type":"number"
            },
            "required":[  
               "minAge",
               "maxAge"
            ]
         }
      }
   },
   "required":[  
      "firstName",
      "lastName"
   ]
}

Answer 1

required 关键字可以出现在任何架构中。所有模式关键字都是如此。

（元关键字 $schema 有一个特例，建议仅在顶层使用）

Answer 2

4.4 Keywords with the possibility to validate container instances (arrays or objects) only validate the instances themselves and not their children (array items or object properties).

所以我明白了，是的，你可以在任何级别上进行验证，但验证应该只考虑与要求相同的级别

Answer 3

是的，required 是任何架构中的有效关键字。嵌套架构没有限制。

要使用您的示例，以下是一个有效的架构，将按照您希望的方式进行验证。

{  
    "title": "Example Schema",
    "type": "object",
    "properties": {  
        "firstName": {  
            "type": "string"
        },
        "lastName": {  
            "type": "string"
        },
        "age": {  
            "type": "object",
            "properties": {  
                "minAge": {  
                    "type": "number"
                },
                "maxAge": {  
                    "type": "number"
                }
            },
            "required": [  
                "minAge",
                "maxAge"
            ]
        }
    },
    "required": [  
        "firstName",
        "lastName"
    ]
}

"required" 关键字在 JSON 架构中

"required" keyword in JSON schema

json

jsonschema